{"id":3811,"date":"2024-01-05T09:09:24","date_gmt":"2024-01-05T01:09:24","guid":{"rendered":"http:\/\/www.ponybai.com\/?p=3811"},"modified":"2023-12-02T10:26:09","modified_gmt":"2023-12-02T02:26:09","slug":"%e7%bb%84%e4%bb%b6","status":"publish","type":"post","link":"http:\/\/www.ponybai.com\/?p=3811","title":{"rendered":"\u7ec4\u4ef6"},"content":{"rendered":"\n

\u60a8\u53ef\u4ee5\u5728\u53e6\u4e00\u4e2a\u7ec4\u4ef6\u7684\u4e3b\u4f53\u4e2d\u6dfb\u52a0\u7ec4\u4ef6\u3002\u7ec4\u5408\u4f7f\u60a8\u80fd\u591f\u4ece\u66f4\u7b80\u5355\u7684\u6784\u5efa\u5757\u7ec4\u4ef6\u6784\u5efa\u590d\u6742\u7684\u7ec4\u4ef6\u3002<\/p>\n\n\n\n

\u6ce8\u610f<\/p>\n\n\n\n

\u5141\u8bb8\u7ee7\u627f\uff0c\u4f46\u4e0d\u5efa\u8bae\u8fd9\u6837\u505a\uff0c\u56e0\u4e3a\u7ec4\u5408\u901a\u5e38\u66f4\u6709\u6548\u3002\u82e5\u8981\u5728\u7ec4\u4ef6\u4e4b\u95f4\u5171\u4eab\u903b\u8f91\uff0c\u8bf7\u4f7f\u7528\u4ec5\u5305\u542b\u903b\u8f91\u7684\u6a21\u5757\u3002\u8bf7\u53c2\u9605\u5176\u4ed6 JavaScript \u6587\u4ef6\u3002\u5982\u679c\u60a8\u9009\u62e9\u4f7f\u7528\u7ee7\u627f\uff0c\u8bf7\u6ce8\u610f\uff0c\u5b83\u4e0d\u9002\u7528\u4e8e Lightning Locker \u4e0b\u7684\u547d\u540d\u7a7a\u95f4\u3002\u60a8\u5fc5\u987b\u542f\u7528 LWS \u624d\u80fd\u8de8\u547d\u540d\u7a7a\u95f4\u4f7f\u7528\u7ee7\u627f\u3002\u4e0d\u80fd\u5728\u4efb\u4e00\u5b89\u5168\u4f53\u7cfb\u7ed3\u6784\u4e2d\u6269\u5c55\u547d\u540d\u7a7a\u95f4\u3002lightning<\/code><\/p>\n\n\n\n

Compose \u7ec4\u4ef6<\/h1>\n\n\n\n

\u4f7f\u7528\u4e00\u7ec4\u8f83\u5c0f\u7684\u7ec4\u4ef6\u7ec4\u5408\u5e94\u7528\u548c\u7ec4\u4ef6\u975e\u5e38\u6709\u7528\uff0c\u4ee5\u4f7f\u4ee3\u7801\u66f4\u6613\u4e8e\u91cd\u7528\u548c\u7ef4\u62a4\u3002\u547d\u540d\u7a7a\u95f4\u5305\u542b\u8bb8\u591a\u57fa\u672c\u7ec4\u4ef6\uff0c\u4f8b\u5982 \uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u7ec4\u4ef6\u6765\u6784\u5efa\u7ec4\u4ef6\u3002lightning<\/code>lightning-button<\/code><\/p>\n\n\n\n

\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u7531\u7ec4\u4ef6\u7ec4\u6210\u7684\u7b80\u5355\u5e94\u7528\u7a0b\u5e8f\u3002\u6807\u8bb0\u662f\u4eba\u4e3a\u7684\uff0c\u56e0\u4e3a\u6211\u4eec\u60f3\u8bf4\u660e\u6240\u6709\u8005<\/em>\u548c\u5bb9\u5668<\/em>\u7684\u6982\u5ff5\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5b9e\u4f8b\u7684\u6570\u91cf\u662f\u53ef\u53d8\u7684\uff0c\u5e76\u5728\u5faa\u73af\u4e2d\u52a8\u6001\u586b\u5145\u3002c-todo-item<\/code>for:each<\/code><\/p>\n\n\n\n

<!-- todoApp.html -->\n<template>\n  <c-todo-wrapper>\n    <c-todo-item item-name=\"Milk\"><\/c-todo-item>\n    <c-todo-item item-name=\"Bread\"><\/c-todo-item>\n  <\/c-todo-wrapper>\n  <template><\/template\n><\/template><\/code><\/pre>\n\n\n\n
\u6240\u6709\u8005<\/p>\n\n\n\n
\u6240\u6709\u8005\u662f\u62e5\u6709\u6a21\u677f\u7684\u7ec4\u4ef6\u3002\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6240\u6709\u8005\u662f\u7ec4\u4ef6\u3002\u6240\u6709\u8005\u63a7\u5236\u5176\u5305\u542b\u7684\u6240\u6709\u7ec4\u5408\u7ec4\u4ef6\u3002\u6240\u6709\u8005\u53ef\u4ee5\uff1ac-todo-app<\/code><\/p>\n\n\n\n
    \n
  • \u5728\u7ec4\u5408\u7ec4\u4ef6\u4e0a\u8bbe\u7f6e\u516c\u5171\u5c5e\u6027<\/li>\n\n\n\n
  • \u5728\u7ec4\u5408\u7ec4\u4ef6\u4e0a\u8c03\u7528\u65b9\u6cd5<\/li>\n\n\n\n
  • \u4fa6\u542c\u7ec4\u5408\u7ec4\u4ef6\u89e6\u53d1\u7684\u4efb\u4f55\u4e8b\u4ef6<\/li>\n<\/ul>\n\n\n\n
    \u5bb9\u5668<\/p>\n\n\n\n
    \u5bb9\u5668\u5305\u542b\u5176\u4ed6\u7ec4\u4ef6\uff0c\u4f46\u5176\u672c\u8eab\u5305\u542b\u5728\u6240\u6709\u8005\u7ec4\u4ef6\u4e2d\u3002\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u662f\u4e00\u4e2a\u5bb9\u5668\u3002\u5bb9\u5668\u4e0d\u5982\u6240\u6709\u8005\u5f3a\u5927\u3002\u5bb9\u5668\u53ef\u4ee5\uff1ac-todo-wrapper<\/code><\/p>\n\n\n\n
      \n
    • \u8bfb\u53d6\u4f46\u4e0d\u80fd\u66f4\u6539\u5305\u542b\u7ec4\u4ef6\u4e2d\u7684\u516c\u5171\u5c5e\u6027<\/li>\n\n\n\n
    • \u5728\u7ec4\u5408\u7ec4\u4ef6\u4e0a\u8c03\u7528\u65b9\u6cd5<\/li>\n\n\n\n
    • \u4fa6\u542c\u5b83\u6240\u5305\u542b\u7684\u7ec4\u4ef6\u5192\u6ce1\u7684\u4e00\u4e9b\uff08\u4f46\u4e0d\u4e00\u5b9a\u662f\u5168\u90e8\uff09\u4e8b\u4ef6\u3002<\/li>\n<\/ul>\n\n\n\n
      \u7236\u6bcd\u548c\u5b69\u5b50<\/p>\n\n\n\n
      \u5f53\u4e00\u4e2a\u7ec4\u4ef6\u5305\u542b\u53e6\u4e00\u4e2a\u7ec4\u4ef6\u65f6\uff0c\u53e6\u4e00\u4e2a\u7ec4\u4ef6\u53c8\u53ef\u4ee5\u5305\u542b\u5176\u4ed6\u7ec4\u4ef6\uff0c\u6211\u4eec\u6709\u4e00\u4e2a\u5305\u542b\u5c42\u6b21\u7ed3\u6784\u3002\u5728\u6587\u6863\u4e2d\uff0c\u6211\u4eec\u6709\u65f6\u4f1a\u8ba8\u8bba\u7236\u7ec4\u4ef6\u548c\u5b50\u7ec4\u4ef6\u3002\u7236\u7ec4\u4ef6\u5305\u542b\u5b50\u7ec4\u4ef6\u3002\u7236\u7ec4\u4ef6\u53ef\u4ee5\u662f\u6240\u6709\u8005\uff0c\u4e5f\u53ef\u4ee5\u662f\u5bb9\u5668\u3002<\/p>\n\n\n\n
      \u8bbe\u7f6e\u5b50\u7ec4\u4ef6\u7684\u5c5e\u6027<\/h1>\n\n\n\n
      \u82e5\u8981\u5411\u4e0b\u901a\u4fe1\u5305\u542b\u5c42\u6b21\u7ed3\u6784\uff0c\u6240\u6709\u8005\u53ef\u4ee5\u5728\u5b50\u7ec4\u4ef6\u4e0a\u8bbe\u7f6e\u5c5e\u6027\u3002HTML \u4e2d\u7684\u5c5e\u6027\u53d8\u6210\u4e86 JavaScript \u4e2d\u7684\u5c5e\u6027\u8d4b\u503c\u3002<\/p>\n\n\n\n
      \u7236\u7ec4\u4ef6\u53ef\u4ee5\u5728\u5b50\u7ec4\u4ef6\u4e0a\u8bbe\u7f6e\u57fa\u5143\u503c\uff0c\u5982\u5b57\u7b26\u4e32\u6216\u6570\u5b57\u3002\u4f46\u662f\uff0c\u4f20\u9012\u7ed9\u7ec4\u4ef6\u7684\u5bf9\u8c61\u6216\u6570\u7ec4\u7b49\u975e\u539f\u59cb\u503c\u662f\u53ea\u8bfb\u7684\uff0c\u60a8\u5fc5\u987b\u8fdb\u884c\u6d45\u62f7\u8d1d\u624d\u80fd\u4fee\u6539\u4efb\u4f55\u5d4c\u5957\u503c\u3002<\/p>\n\n\n\n
      \u5728\u5b50\u7ec4\u4ef6\u4e0a\u8bbe\u7f6e\u57fa\u5143\u503c<\/h2>\n\n\n\n
      \u8ba9\u6211\u4eec\u770b\u4e00\u4e0b\u6240\u6709\u8005 \uff0c \u5982\u4f55\u5728 \u7684\u4e24\u4e2a\u5b9e\u4f8b\u4e0a\u8bbe\u7f6e\u516c\u5171\u5c5e\u6027\u3002c-todo-app<\/code>c-todo-item<\/code><\/p>\n\n\n\n
      \u770b\u3002\u4fee\u9970\u5668\u5c06\u5b57\u6bb5\u516c\u5f00\u4e3a\u516c\u5171\u5c5e\u6027\u3002todoItem.js<\/code>@api<\/code>itemName<\/code><\/p>\n\n\n\n
      \/\/ todoItem.js\nimport { LightningElement, api } from \"lwc\";\nexport default class TodoItem extends LightningElement {\n  @api itemName;\n}<\/code><\/pre>\n\n\n\n
      \u82e5\u8981\u8bbe\u7f6e\u516c\u5171\u5c5e\u6027\uff0c\u8bf7\u5728\u6bcf\u4e2a\u7ec4\u4ef6\u4e0a\u8bbe\u7f6e\u8be5\u5c5e\u6027\u3002itemName<\/code>todoApp.html<\/code>item-name<\/code>c-todo-item<\/code><\/p>\n\n\n\n
      <!-- todoApp.html -->\n<template>\n  <c-todo-item item-name=\"Milk\"><\/c-todo-item>\n  <c-todo-item item-name=\"Bread\"><\/c-todo-item>\n<\/template><\/code><\/pre>\n\n\n\n
      JavaScript \u4e2d\u7684\u5c5e\u6027\u540d\u79f0\u91c7\u7528\u9a7c\u5cf0\u5927\u5c0f\u5199\uff0c\u800c HTML \u5c5e\u6027\u540d\u79f0\u91c7\u7528\u70e4\u8089\u4e32\u5927\u5c0f\u5199\uff08\u7834\u6298\u53f7\u5206\u9694\uff09\u4ee5\u5339\u914d HTML \u6807\u51c6\u3002\u5728 \u4e2d\uff0c\u6807\u8bb0\u4e2d\u7684\u5c5e\u6027\u6620\u5c04\u5230 \u7684 JavaScript \u5c5e\u6027\u3002todoApp.html<\/code>item-name<\/code>itemName<\/code>c-todo-item<\/code><\/p>\n\n\n\n
      \u63d0\u793a<\/p>\n\n\n\n
      \u6b64\u793a\u4f8b\u4f7f\u7528 \u548c \u7684\u9759\u6001\u503c\uff0c\u4f46\u5b9e\u9645\u7ec4\u4ef6\u901a\u5e38\u4f1a\u5bf9\u6240\u6709\u8005\u7684 JavaScript \u6587\u4ef6 .Milk<\/code>Bread<\/code>for:each<\/code>todoApp.js<\/code><\/p>\n\n\n\n
      \u6709\u5173\u7a0d\u5fae\u590d\u6742\u7684\u793a\u4f8b\uff0c\u8bf7\u53c2\u9605\u00a0lwc-recipes \u5b58\u50a8\u5e93\u4e2d\u7684\u7ec4\u5408\u57fa\u672c\u914d\u65b9\u3002<\/p>\n\n\n\n
      \u60a8\u8fd8\u53ef\u4ee5\u5728\u00a0lwc.dev\u00a0\u7684 Playground \u4e2d\u4f7f\u7528\u7c7b\u4f3c\u7684\u4ee3\u7801\uff0c\u8fd9\u662f Lightning Web \u7ec4\u4ef6\uff1a\u5f00\u6e90\u5f00\u53d1\u4eba\u5458\u7f51\u7ad9\u3002<\/p>\n\n\n\n
      \u5728\u5b50\u7ec4\u4ef6\u4e0a\u8bbe\u7f6e\u975e\u57fa\u5143\u503c<\/h2>\n\n\n\n
      \u4f20\u9012\u7ed9\u7ec4\u4ef6\u7684\u975e\u57fa\u5143\u503c\uff08\u5982\u5bf9\u8c61\u6216\u6570\u7ec4\uff09\u662f\u53ea\u8bfb\u7684\u3002\u82e5\u8981\u66f4\u6539\u6570\u636e\uff0c\u8bf7\u521b\u5efa\u8981\u66f4\u6539\u7684\u5bf9\u8c61\u7684\u6d45\u62f7\u8d1d\u3002<\/p>\n\n\n\n
      \u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u7236\u7ec4\u4ef6\uff0c\u5b83\u5c06\u5bf9\u8c61\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\uff0c\u7136\u540e\u8ba9\u5b50\u7ec4\u4ef6\u66f4\u65b0\u5176\u503c\u3002<\/p>\n\n\n\n
      <!-- parent.html -->\n<template>\n  <div>Parent: {serializedObj}<\/div>\n  <c-child obj=\"{obj}\"><\/c-child>\n<\/template><\/code><\/pre>\n\n\n\n
      \u5728 JavaScript \u4e2d\u8bbe\u7f6e\u503c\u3002<\/p>\n\n\n\n
      \/\/ parent.js\nimport { LightningElement } from \"lwc\";\n\nexport default class Parent extends LightningElement {\n  obj = {\n    msg: \"hello\",\n  };\n\n  get serializedObj() {\n    return JSON.stringify(this.obj);\n  }\n}<\/code><\/pre>\n\n\n\n
      \u53cd\u5e94\u5f0f\u5bf9\u8c61\u4ece\u7236\u7ec4\u4ef6\u4f20\u9012\u5230\u5b50\u7ec4\u4ef6\u3002\u5b50\u7ec4\u4ef6\u663e\u793a\u5e26\u6709\u4e24\u4e2a\u6309\u94ae\u7684\u5e8f\u5217\u5316\u5bf9\u8c61\u5b57\u7b26\u4e32\uff0c\u8fd9\u4e24\u4e2a\u6309\u94ae\u901a\u8fc7\u66f4\u65b0\u539f\u59cb\u5bf9\u8c61\u6216\u5176\u6d45\u8868\u526f\u672c\u6765\u66f4\u65b0\u5bf9\u8c61\u503c\u3002obj<\/code><\/p>\n\n\n\n
      <!-- child.html -->\n<template>\n  <div>Child: {serializedObj}<\/div>\n\n  <button onclick=\"{updateOriginal}\">Update original<\/button>\n  <button onclick=\"{updateShallow}\">Update shallow<\/button>\n<\/template><\/code><\/pre>\n\n\n\n
      \u8be5\u7ec4\u4ef6\u65e0\u6cd5\u66f4\u6539\u5bf9\u8c61\u6216\u6570\u7ec4\u7684\u5185\u5bb9\u3002\u5f53\u60a8\u5c1d\u8bd5\u66f4\u65b0\u539f\u59cb\u5bf9\u8c61\u503c\u65f6\uff0c\u4f1a\u5f15\u53d1\u9519\u8bef\uff0c\u56e0\u4e3a\u5b50\u7ec4\u4ef6\u6b63\u5728\u5c1d\u8bd5\u6539\u53d8\u5bf9\u8c61\u4e0a\u7684\u5c5e\u6027\u3002Uncaught Error: Invalid mutation: Cannot set \"msg\" on \"[object Object]\". \"[object Object]\" is read-only.<\/code><\/p>\n\n\n\n
      \/\/ child.js\nimport { LightningElement, api } from \"lwc\";\n\nexport default class Child extends LightningElement {\n  @api obj;\n\n  get serializedObj() {\n    return JSON.stringify(this.obj);\n  }\n\n  updateOriginal() {\n    this.obj.msg += \"!!!\"; \/\/ throws an invalid mutation error\n  }\n\n  updateShallow() {\n    this.obj = { ...this.obj, msg: this.obj.msg + \"!\" };\n  }\n}<\/code><\/pre>\n\n\n\n
      \u5177\u6709\u6765\u81ea\u7236\u7ec4\u4ef6\u7684\u5f15\u7528\u7684\u975e\u57fa\u5143\u503c\uff08\u5982 \u6240\u793a\uff09\u5305\u88c5\u5728\u4ee3\u7406\u4e2d\uff0c\u65e0\u6cd5\u4fee\u6539\u3002\u4f46\u662f\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u975e\u57fa\u5143\u7684\u6d45\u62f7\u8d1d\u6765\u4fee\u6539\u5176\u5185\u5bb9\u3002this.obj<\/code><\/p>\n\n\n\n
      \u5f53\u629b\u51fa\u65e0\u6548\u7684\u7a81\u53d8\u9519\u8bef\u65f6\uff0c\u503c\u8d4b\u503c\u4ec5\u66f4\u65b0\u5b50\u7ec4\u4ef6\u4e0a\u7684\u503c\u3002\u7236\u7ec4\u4ef6\u4e0a\u7684\u503c\u4e0d\u4f1a\u66f4\u65b0\u3002this.obj.msg<\/code>this.obj<\/code>updateShallow()<\/code>{serializedObj}<\/code>{serializedObj}<\/code><\/p>\n\n\n\n
      \u6570\u636e\u6d41<\/h1>\n\n\n\n
      \u4e3a\u4e86\u9632\u6b62\u4ee3\u7801\u590d\u6742\u6027\u548c\u610f\u5916\u7684\u526f\u4f5c\u7528\uff0c\u6570\u636e\u5e94\u8be5\u6cbf\u4e00\u4e2a\u65b9\u5411\u6d41\u52a8\uff0c\u4ece\u7236\u7ea7\u6d41\u5411\u5b50\u7ea7\u3002<\/p>\n\n\n\n
      \u5f53\u7ec4\u4ef6\u4fee\u9970\u5b57\u6bb5\u4ee5\u5c06\u5176\u516c\u5f00\u4e3a\u516c\u5171\u5c5e\u6027\u65f6\uff0c\u5b83\u5e94\u8be5\u4ec5\u5728\u521d\u59cb\u5316\u5b57\u6bb5\u65f6\u8bbe\u7f6e\u8be5\u503c\u3002\u521d\u59cb\u5316\u5b57\u6bb5\u540e\uff0c\u53ea\u6709\u6240\u6709\u8005\u7ec4\u4ef6\u624d\u80fd\u8bbe\u7f6e\u8be5\u503c\u3002\u7ec4\u4ef6\u5e94\u5c06\u4f20\u9012\u7ed9\u5b83\u7684\u503c\u89c6\u4e3a\u53ea\u8bfb\u3002@api<\/code><\/p>\n\n\n\n
      \u82e5\u8981\u89e6\u53d1\u6240\u6709\u8005\u7ec4\u4ef6\u63d0\u4f9b\u7684\u5c5e\u6027\u503c\u7684\u7a81\u53d8\uff0c\u5b50\u7ec4\u4ef6\u53ef\u4ee5\u5411\u7236\u7ec4\u4ef6\u53d1\u9001\u4e8b\u4ef6\u3002\u5982\u679c\u7236\u7ea7\u62e5\u6709\u6570\u636e\uff0c\u5219\u7236\u7ea7\u53ef\u4ee5\u66f4\u6539\u5c5e\u6027\u503c\uff0c\u8be5\u5c5e\u6027\u503c\u901a\u8fc7\u5355\u5411\u6570\u636e\u7ed1\u5b9a\u5411\u4e0b\u4f20\u64ad\u5230\u5b50\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
      \u4f20\u9012\u7ed9\u7ec4\u4ef6\u7684\u5bf9\u8c61\u662f\u53ea\u8bfb\u7684<\/h2>\n\n\n\n
      \u4f20\u9012\u7ed9\u7ec4\u4ef6\u7684\u975e\u57fa\u5143\u503c\uff08\u5982\u5bf9\u8c61\u6216\u6570\u7ec4\uff09\u662f\u53ea\u8bfb\u7684\u3002\u8be5\u7ec4\u4ef6\u65e0\u6cd5\u66f4\u6539\u5bf9\u8c61\u6216\u6570\u7ec4\u7684\u5185\u5bb9\u3002\u5982\u679c\u7ec4\u4ef6\u5c1d\u8bd5\u66f4\u6539\u5185\u5bb9\uff0c\u60a8\u4f1a\u5728\u6d4f\u89c8\u5668\u63a7\u5236\u53f0\u4e2d\u770b\u5230\u9519\u8bef\uff1aUncaught Error: Invalid mutation: Cannot set \"msg\" on \"[object Object]\". \"[object Object]\" is read-only.<\/code><\/p>\n\n\n\n
      \u82e5\u8981\u66f4\u6539\u6570\u636e\uff0c\u8bf7\u521b\u5efa\u8981\u66f4\u6539\u7684\u5bf9\u8c61\u7684\u6d45\u62f7\u8d1d\u3002\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b\u66f4\u65b0\u5bf9\u8c61\u503c\u7684\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
      <!-- myCmp.html -->\n<template>\n  <p>{serializedObj}<\/p>\n  <button onclick=\"{updateShallowCopy}\">Update<\/button>\n<\/template><\/code><\/pre>\n\n\n\n
      \u521b\u5efa\u5bf9\u8c61\u7684\u6d45\u62f7\u8d1d\uff0c\u8be5\u62f7\u8d1d\u4ec5\u590d\u5236\u9876\u7ea7\u5c5e\u6027\u3002\u4e0d\u4f1a\u590d\u5236\u5d4c\u5957\u5bf9\u8c61\u7684\u503c\u3002\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u66f4\u65b0\u4e3a\u5355\u51fb\u6309\u94ae\u65f6\u3002{\"msg\":\"hello\"}<\/code>{\"msg\":\"hello!\"}<\/code><\/p>\n\n\n\n
      \/\/ myCmp.js\nimport { LightningElement, api } from \"lwc\";\n\nexport default class extends LightningElement {\n  obj = {\n    msg: \"hello\",\n  };\n\n  get serializedObj() {\n    return JSON.stringify(this.obj);\n  }\n\n  updateShallowCopy() {\n    this.obj = { ...this.obj, msg: this.obj.msg + \"!\" };\n  }\n}<\/code><\/pre>\n\n\n\n
      \u4e5f\u53ef\u4ee5\u4f7f\u7528 \u91cd\u65b0\u5206\u914d\u5bf9\u8c61\u7684\u503c\u3002\u8be5\u7ec4\u4ef6\u62e5\u6709\u8be5\u5b57\u6bb5\uff0c\u5e76\u4e14\u53ef\u4ee5\u4e3a\u8be5\u5b57\u6bb5\u5206\u914d\u4e00\u4e2a\u65b0\u503c\u3002\u76f8\u53cd\uff0c\u5982\u679c\u7ec4\u4ef6\u5c1d\u8bd5\u4f7f\u7528 \u66f4\u6539\u5bf9\u8c61\u4e0a\u7684\u5d4c\u5957\u503c\uff0c\u5219\u4f1a\u5728 Web \u63a7\u5236\u53f0\u4e2d\u6536\u5230\u65e0\u6548\u7684\u7a81\u53d8\u9519\u8bef\u3002this.obj = { msg: 'My new message' }<\/code>myCmp<\/code>obj<\/code>this.obj.msg = 'new value'<\/code><\/p>\n\n\n\n
      \u540c\u6837\uff0c\u5177\u6709\u6765\u81ea\u7236\u7ec4\u4ef6\u7684\u5f15\u7528\u7684\u975e\u57fa\u5143\u503c\u5305\u88c5\u5728\u4ee3\u7406\u4e2d\uff0c\u5e76\u4e14\u65e0\u6cd5\u4fee\u6539\u3002\u8bf7\u53c2\u89c1\u8bbe\u7f6e\u5b50\u7ec4\u4ef6\u7684\u5c5e\u6027\u3002<\/p>\n\n\n\n
      \u82e5\u8981\u89e6\u53d1\u6240\u6709\u8005\u7ec4\u4ef6\u63d0\u4f9b\u7684\u5c5e\u6027\u503c\u7684\u7a81\u53d8\uff0c\u7ec4\u4ef6\u5e94\u5411\u6240\u6709\u8005\u53d1\u9001\u4e8b\u4ef6\u3002<\/p>\n\n\n\n
      \u5bf9\u516c\u5171\u5c5e\u6027\u4f7f\u7528\u57fa\u5143\u503c<\/h2>\n\n\n\n
      \u5efa\u8bae\u5bf9\u5c5e\u6027\u4f7f\u7528\u57fa\u5143\u6570\u636e\u7c7b\u578b\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u5bf9\u8c61\u6570\u636e\u7c7b\u578b\u3002\u5728\u66f4\u9ad8\u7ea7\u522b\u7684\u7ec4\u4ef6\u4e2d\u5bf9\u590d\u6742\u7684\u6570\u636e\u7ed3\u6784\u8fdb\u884c\u5207\u7247\uff0c\u5e76\u5c06\u57fa\u5143\u503c\u4f20\u9012\u7ed9\u7ec4\u4ef6\u540e\u4ee3\u3002<\/p>\n\n\n\n
      \u6700\u597d\u4f7f\u7528\u57fa\u5143\u503c\u6709\u51e0\u4e2a\u539f\u56e0\u3002<\/p>\n\n\n\n
        \n
      • \u57fa\u5143\u503c\u9700\u8981\u660e\u786e\u5b9a\u4e49\u6570\u636e\u5f62\u72b6\u7684\u7279\u5b9a\u5c5e\u6027\u3002\u63a5\u53d7\u5bf9\u8c61\u6216\u6570\u7ec4\u9700\u8981\u6587\u6863\u6765\u6307\u5b9a\u5f62\u72b6\u3002\u5982\u679c\u5bf9\u8c61\u5f62\u72b6\u53d1\u751f\u53d8\u5316\uff0c\u4f7f\u7528\u8005\u5c31\u4f1a\u4e2d\u65ad\u3002@api<\/code><\/li>\n\n\n\n
      • \u6807\u51c6 HTML \u5143\u7d20\u4ec5\u63a5\u53d7\u5c5e\u6027\u7684\u57fa\u5143\u503c\u3002\u5f53\u6807\u51c6 HTML \u5143\u7d20\u9700\u8981\u590d\u6742\u5f62\u72b6\u65f6\uff0c\u5b83\u4f7f\u7528\u5b50\u7ec4\u4ef6\u3002\u4f8b\u5982\uff0c\u5143\u7d20\u4f7f\u7528 \u548c \u5143\u7d20\u3002\u53ea\u80fd\u5728 HTML \u4e2d\u5b9a\u4e49\u57fa\u5143\u7c7b\u578b\u3002\u4f8b\u5982\uff0c\u5728 HTML \u4e2d\u4e0d\u662f\u503c\uff0c\u800c\u662f\u5728 Lightning Web \u7ec4\u4ef6\u4e2d\u3002table<\/code>tr<\/code>td<\/code><table data={...}><\/code><\/li>\n<\/ul>\n\n\n\n
        \u5728\u5b50\u7ec4\u4ef6\u4e0a\u8c03\u7528\u65b9\u6cd5<\/h1>\n\n\n\n
        \u82e5\u8981\u516c\u5f00\u516c\u5171\u65b9\u6cd5\uff0c\u8bf7\u4f7f\u7528 .\u516c\u5171\u65b9\u6cd5\u662f\u7ec4\u4ef6 API \u7684\u4e00\u90e8\u5206\u3002\u82e5\u8981\u5728\u5305\u542b\u5c42\u6b21\u7ed3\u6784\u4e2d\u5411\u4e0b\u901a\u4fe1\uff0c\u6240\u6709\u8005\u548c\u7236\u7ec4\u4ef6\u53ef\u4ee5\u5728\u5b50\u7ec4\u4ef6\u4e0a\u8c03\u7528 JavaScript \u65b9\u6cd5\u3002@api<\/code><\/p>\n\n\n\n
        \u6ce8\u610f<\/p>\n\n\n\n
        \u82e5\u8981\u5728\u5305\u542b\u5c42\u6b21\u7ed3\u6784\u4e2d\u5411\u4e0a\u901a\u4fe1\uff0c\u8bf7\u5728\u5b50\u7ec4\u4ef6\u4e2d\u89e6\u53d1\u4e8b\u4ef6\uff0c\u5e76\u5728\u6240\u6709\u8005\u6216\u5bb9\u5668\u7ec4\u4ef6\u4e2d\u5904\u7406\u8be5\u4e8b\u4ef6\u3002\u8bf7\u53c2\u9605\u4e0e\u4e8b\u4ef6\u901a\u4fe1\u3002<\/p>\n\n\n\n
        \u67e5\u770b\u00a0lwc-recipes\u00a0\u5b58\u50a8\u5e93\u4e2d\u7684\u7ec4\u4ef6\uff08\u4ee5\u524d\u547d\u540d\u4e3a \uff09\uff0c\u8be5\u7ec4\u4ef6\u5728\u5176\u5b50\u7ec4\u4ef6\u4e0a\u8c03\u7528\u65b9\u6cd5\u3002apiMethodapiFunctionclock<\/code><\/p>\n\n\n\n
        \u5b9a\u4e49\u65b9\u6cd5<\/h2>\n\n\n\n
        \u6b64\u793a\u4f8b\u901a\u8fc7\u5411\u7ec4\u4ef6\u4e2d\u6dfb\u52a0\u88c5\u9970\u5668\u6765\u516c\u5f00\u5c5e\u6027\u548c \u548c\u65b9\u6cd5\u7684 getter\u3002\u5305\u542b\u7684\u7236\u7ec4\u4ef6\u53ef\u4ee5\u8bfb\u53d6\u5c5e\u6027\u5e76\u8c03\u7528\u65b9\u6cd5\u3002\u4e0b\u9762\u662f JavaScript \u6587\u4ef6\u3002isPlaying<\/code>play()<\/code>pause()<\/code>c-video-player<\/code>@api<\/code>c-video-player<\/code><\/p>\n\n\n\n
        \/\/ videoPlayer.js\nimport { LightningElement, api } from \"lwc\";\n\nexport default class VideoPlayer extends LightningElement {\n  @api videoUrl;\n\n  @api\n  get isPlaying() {\n    const player = this.template.querySelector(\"video\");\n    return player !== null && player.paused === false;\n  }\n\n  @api\n  play() {\n    const player = this.template.querySelector(\"video\");\n    \/\/ the player might not be in the DOM just yet\n    if (player) {\n      player.play();\n    }\n  }\n\n  @api\n  pause() {\n    const player = this.template.querySelector(\"video\");\n    if (player) {\n      \/\/ the player might not be in the DOM just yet\n      player.pause();\n    }\n  }\n\n  \/\/ private getter for computed value\n  get videoType() {\n    return \"video\/\" + this.videoUrl.split(\".\").pop();\n  }\n}<\/code><\/pre>\n\n\n\n
        videoUrl<\/code>\u662f\u516c\u5171\u8d22\u4ea7\u3002\u88c5\u9970\u5668\u53ef\u7528\u4e8e\u5728\u7ec4\u4ef6\u4e0a\u5b9a\u4e49\u516c\u5171\u5c5e\u6027\u548c\u516c\u5171 JavaScript \u65b9\u6cd5\u3002\u516c\u5171\u5c5e\u6027\u662f\u7ec4\u4ef6\u516c\u5171 API \u7684\u53e6\u4e00\u90e8\u5206\u3002@api<\/code><\/p>\n\n\n\n
        \u6ce8\u610f<\/p>\n\n\n\n
        \u82e5\u8981\u8bbf\u95ee\u6a21\u677f\u62e5\u6709\u7684\u5143\u7d20\uff0c\u4ee3\u7801\u5c06\u4f7f\u7528\u00a0template<\/code>\u00a0\u5c5e\u6027\u3002<\/p>\n\n\n\n
        \u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b\u5b9a\u4e49 video \u5143\u7d20\u7684 HTML \u6587\u4ef6\u3002<\/p>\n\n\n\n
        <!-- videoPlayer.html -->\n<template>\n  <div class=\"fancy-border\">\n    <video autoplay>\n      <source src={videoUrl} type={videoType} \/>\n    <\/video>\n  <\/div>\n<\/template><\/code><\/pre>\n\n\n\n
        \u5728\u5b9e\u9645\u7ec4\u4ef6\u4e2d\uff0c\u901a\u5e38\u5177\u6709\u64ad\u653e\u6216\u6682\u505c\u89c6\u9891\u672c\u8eab\u7684\u63a7\u4ef6\u3002\u4e3a\u4e86\u8bf4\u660e\u516c\u5171 API \u7684\u8bbe\u8ba1\uff0c\u6b64\u793a\u4f8b\u4e2d\u63a7\u4ef6\u4f4d\u4e8e\u8c03\u7528\u516c\u5171\u65b9\u6cd5\u7684\u7236\u7ec4\u4ef6\u4e2d\u3002c-video-player<\/code><\/p>\n\n\n\n
        \u8c03\u7528\u65b9\u6cd5<\/h2>\n\n\n\n
        \u8be5\u7ec4\u4ef6\u5305\u542b\u5e76\u5177\u6709\u7528\u4e8e\u8c03\u7528 \u4e2d\u7684 \u548c \u65b9\u6cd5\u7684\u6309\u94ae\u3002\u4e0b\u9762\u662f HTML\u3002c-method-caller<\/code>c-video-player<\/code>play()<\/code>pause()<\/code>c-video-player<\/code><\/p>\n\n\n\n
        <!-- methodCaller.html -->\n<template>\n  <div>\n    <c-video-player video-url={video}><\/c-video-player>\n    <button onclick={handlePlay}>Play<\/button>\n    <button onclick={handlePause}>Pause<\/button>\n  <\/div>\n<\/template><\/code><\/pre>\n\n\n\n
        \u5355\u51fb\u4e2d\u7684\u6309\u94ae\u5c06\u5728\u6211\u4eec\u8fde\u63a5 \u4e2d\u7684 \u548c \u65b9\u6cd5\u540e\u64ad\u653e\u6216\u6682\u505c\u89c6\u9891\u3002c-method-caller<\/code>c-video-player<\/code>handlePlay<\/code>handlePause<\/code>c-method-caller<\/code><\/p>\n\n\n\n
        \u4e0b\u9762\u662f \u7684 JavaScript \u6587\u4ef6\u3002c-method-caller<\/code><\/p>\n\n\n\n
        \/\/ methodCaller.js\nimport { LightningElement } from \"lwc\";\n\nexport default class MethodCaller extends LightningElement {\n  video = \"https:\/\/www.w3schools.com\/tags\/movie.mp4\";\n\n  handlePlay() {\n    this.template.querySelector(\"c-video-player\").play();\n  }\n\n  handlePause() {\n    this.template.querySelector(\"c-video-player\").pause();\n  }\n}<\/code><\/pre>\n\n\n\n
        \u4e2d\u7684\u51fd\u6570\u8c03\u7528\u5143\u7d20\u4e2d\u7684\u65b9\u6cd5\u3002 \u8fd4\u56de \u4e2d\u7684\u5143\u7d20\u3002\u8be5\u8c03\u7528\u53ef\u7528\u4e8e\u8bbf\u95ee\u5b50\u7ec4\u4ef6\uff0c\u4ee5\u4fbf\u53ef\u4ee5\u5728\u7ec4\u4ef6\u4e0a\u8c03\u7528\u65b9\u6cd5\u3002handlePlay()<\/code>c-method-caller<\/code>play()<\/code>c-video-player<\/code>this.template.querySelector('c-video-player')<\/code>c-video-player<\/code>methodCaller.html<\/code>this.template.querySelector()<\/code><\/p>\n\n\n\n
        \u4e2d\u7684\u51fd\u6570\u8c03\u7528\u5143\u7d20\u4e2d\u7684\u65b9\u6cd5\u3002handlePause()<\/code>c-method-caller<\/code>pause()<\/code>c-video-player<\/code><\/p>\n\n\n\n
        \u8fd4\u56de\u503c<\/h2>\n\n\n\n
        \u82e5\u8981\u4ece JavaScript \u65b9\u6cd5\u8fd4\u56de\u503c\uff0c\u8bf7\u4f7f\u7528\u8be5\u8bed\u53e5\u3002\u4f8b\u5982\uff0c\u8bf7\u53c2\u89c1\u4e2d\u7684\u65b9\u6cd5\u3002return<\/code>isPlaying()<\/code>c-video-player<\/code><\/p>\n\n\n\n
        @api get isPlaying() {\n    const player = this.template.querySelector('video');\n    return player !== null && player.paused === false;\n}<\/code><\/pre>\n\n\n\n
        \u65b9\u6cd5\u53c2\u6570<\/h2>\n\n\n\n
        \u82e5\u8981\u5c06\u6570\u636e\u4f20\u9012\u7ed9 JavaScript \u65b9\u6cd5\uff0c\u8bf7\u4e3a\u8be5\u65b9\u6cd5\u5b9a\u4e49\u4e00\u4e2a\u6216\u591a\u4e2a\u53c2\u6570\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u5b9a\u4e49\u91c7\u7528\u63a7\u5236\u89c6\u9891\u64ad\u653e\u901f\u5ea6\u7684\u53c2\u6570\u7684\u65b9\u6cd5\u3002play()<\/code>speed<\/code><\/p>\n\n\n\n
        @api play(speed) { \u2026 }<\/code><\/pre>\n\n\n\n
        \u67e5\u8be2\u9009\u62e9\u5668<\/h2>\n\n\n\n
        \u8be5\u65b9\u6cd5\u662f\u4e00\u4e2a\u6807\u51c6\u7684 DOM API\uff0c\u5b83\u8fd4\u56de\u4e0e\u9009\u62e9\u5668\u5339\u914d\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002querySelector()<\/code><\/p>\n\n\n\n
        \u5982\u679c\u8981\u904d\u5386\u6570\u7ec4\uff0c\u8bf7\u8003\u8651\u5411\u5143\u7d20\u6dfb\u52a0\u4e00\u4e9b\u5176\u4ed6\u5c5e\u6027\uff0c\u4f8b\u5982 \u6216 value\uff0c\u5e76\u4f7f\u7528\u5b83\u6765\u9009\u62e9\u6240\u9700\u7684\u5143\u7d20\u3002class<\/code>data-*<\/code><\/p>\n\n\n\n
        \u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a DOM \u5143\u7d20\u6570\u7ec4\u3002querySelectorAll()<\/code><\/p>\n\n\n\n
        \u6ce8\u610f<\/p>\n\n\n\n
        \u4e0d\u8981\u5c06 \u4f20\u9012\u7ed9\u67e5\u8be2\u65b9\u6cd5\uff0c\u4f8b\u5982 \u3002\u5448\u73b0 HTML \u6a21\u677f\u65f6\uff0c\u53ef\u4ee5\u5c06\u503c\u8f6c\u6362\u4e3a\u5168\u5c40\u552f\u4e00\u503c\u3002\u5982\u679c\u5728 JavaScript \u4e2d\u4f7f\u7528\u9009\u62e9\u5668\uff0c\u5219\u5b83\u4e0e\u8f6c\u6362\u540e\u7684 .id<\/code>querySelector<\/code>id<\/code>id<\/code>id<\/code><\/p>\n\n\n\n
        \u6709\u5173\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u00a0developer.mozilla.org\/en-US\/docs\/Web\/API\/Element\/querySelectorAll\u00a0\u548c\u00a0developer.mozilla.org\/en-US\/docs\/Web\/API\/Element\/querySelector\u3002<\/p>\n\n\n\n
        \u5b50\u7ec4\u4ef6\u4e0a\u7684 Spread \u5c5e\u6027<\/h1>\n\n\n\n
        \u4f7f\u7528\u6307\u4ee4\u5c06\u5bf9\u8c61\u4e2d\u7684\u4e00\u7ec4\u5c5e\u6027\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\u3002 \u8fd8\u4f7f\u5143\u7d20\u80fd\u591f\u63a5\u53d7\u5728\u8fd0\u884c\u65f6\u7ed1\u5b9a\u4e3a\u5c5e\u6027\u7684\u5bf9\u8c61\u3002lwc:spread<\/code>lwc:spread<\/code><\/p>\n\n\n\n
        \u63d0\u793a<\/p>\n\n\n\n
        lwc-recipes\u00a0\u5b58\u50a8\u5e93\u6709\u4e00\u4e2a\u6f14\u793a\u6307\u4ee4\u7684\u7ec4\u4ef6\u3002apiSpreadlwc:spread<\/code><\/p>\n\n\n\n
        \u8be5\u6307\u4ee4\u63a5\u53d7\u4e00\u4e2a\u5bf9\u8c61\u3002lwc:spread<\/code><\/p>\n\n\n\n
        <!-- app.html -->\n<template>\n  <c-child lwc:spread={childProps}><\/c-child>\n<\/template><\/code><\/pre>\n\n\n\n
        \u4f7f\u7528\u5177\u6709\u952e\u503c\u5bf9\u7684\u5bf9\u8c61\uff0c\u5176\u4e2d\u952e\u662f\u5c5e\u6027\u540d\u79f0\u3002<\/p>\n\n\n\n
        \/\/ app.js\nimport { LightningElement } from \"lwc\";\n\nexport default class extends LightningElement {\n  childProps = { name: \"James Smith\", country: \"USA\" };\n}<\/code><\/pre>\n\n\n\n
        \u5728\u5b50\u7ec4\u4ef6\u4e2d\uff0c\u4f7f\u7528\u6a21\u677f\u4e2d\u7684\u5c5e\u6027\u3002<\/p>\n\n\n\n
        <!-- child.html -->\n<template>\n  <p>Name: {name}<\/p>\n  <p>Country : {country}<\/p>\n<\/template><\/code><\/pre>\n\n\n\n
        \u4f7f\u7528\u4fee\u9970\u5668\u5411\u7236\u7ec4\u4ef6\u516c\u5f00\u5c5e\u6027\u3002@api<\/code><\/p>\n\n\n\n
        \/\/ child.js\nimport { LightningElement, api } from \"lwc\";\n\nexport default class Child extends LightningElement {\n  @api name;\n  @api country;\n}<\/code><\/pre>\n\n\n\n
        lwc:spread<\/code>\u59cb\u7ec8\u6700\u540e\u5e94\u7528\uff0c\u56e0\u6b64\u5b83\u4f1a\u8986\u76d6\u6a21\u677f\u4e2d\u76f4\u63a5\u58f0\u660e\u7684\u4efb\u4f55\u5c5e\u6027\u3002\u4e00\u4e2a\u6307\u4ee4\u53ea\u80fd\u4f7f\u7528\u4e00\u4e2a\u5b9e\u4f8b\u3002lwc:spread<\/code><\/p>\n\n\n\n
        <!-- app.html -->\n<template>\n  <c-child name=\"lwc\" lwc:spread={childProps}><\/c-child>\n<\/template><\/code><\/pre>\n\n\n\n
        \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u5373\u4f7f\u7236\u7ec4\u4ef6\u4f20\u5165\uff0c\u4e5f\u8981\u4f20\u9012 \u3002\u6700\u7ec8\uff0c\u5b50\u7ec4\u4ef6\u5c06\u91c7\u7528\u8be5\u540d\u79f0\u3002c-child<\/code>name<\/code>Lightning Web Components<\/code>name=\"lwc\"<\/code>\"lwc\"<\/code><\/p>\n\n\n\n
        \/\/ app.js\nimport { LightningElement } from \"lwc\";\n\nexport default class extends LightningElement {\n  childProps = { name: \"Lightning Web Components\" };\n}<\/code><\/pre>\n\n\n\n
        lwc:spread<\/code>\u4e0d\u5c06\u7ec4\u4ef6\u7ed1\u5b9a\u5230\u6a21\u677f\u4e2d\u5b9a\u4e49\u7684\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5728\u5bf9\u8c61\u4e2d\u4f20\u5165\u5904\u7406\u7a0b\u5e8f\u4f5c\u4e3a\u5c5e\u6027\u540d\u79f0\u3002onclick<\/code><\/p>\n\n\n\n
        <!-- app.html -->\n<template>\n  <c-child lwc:spread={simpleProps}><\/c-child>\n<\/template><\/code><\/pre>\n\n\n\n
        \u5728\u8fd9\u91cc\uff0c\u4f5c\u4e3a .\u5355\u51fb c-child \u5143\u7d20\u65f6\uff0c\u5c06\u66ff\u6362\u4e3a \u3002c-child<\/code>name<\/code>LWC<\/code>spreadClick()<\/code>name<\/code>Lightning Web Components<\/code><\/p>\n\n\n\n
        \/\/ app.js\nimport { LightningElement } from \"lwc\";\n\nexport default class extends LightningElement {\n  simpleProps = { name: \"LWC\", onclick: this.spreadClick.bind(this) };\n  spreadClick() {\n    this.simpleProps = { name: \"Lightning Web Components\" };\n  }\n}<\/code><\/pre>\n\n\n\n
        \u867d\u7136\u6211\u4eec\u6ca1\u6709\u5305\u542b\u5728 \u4e2d\uff0c\u4f46\u5143\u7d20\u5305\u542b\u4e4b\u524d\u901a\u8fc7\u5bf9\u8c61\u5206\u914d\u7ed9\u5b83\u7684\u5143\u7d20\u3002onclick<\/code>spreadClick()<\/code>onclick<\/code>simpleProps<\/code><\/p>\n\n\n\n
        \u5728\u5b50\u7ec4\u4ef6\u4e0a\u53cd\u6620 HTML \u5c5e\u6027<\/h2>\n\n\n\n
        \u5927\u591a\u6570 HTML \u5c5e\u6027\u90fd\u53cd\u6620\u4e3a\u5c5e\u6027\u3002\u4f8b\u5982\uff0c\u5c5e\u6027\u53cd\u6620\u4e3a\u5c5e\u6027\u3002classclassName<\/code><\/p>\n\n\n\n
        \u5047\u8bbe\u60a8\u5c06\u5c5e\u6027\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
        <!-- app.html -->\n<template>\n  <c-child lwc:spread={spanProps}><\/c-child>\n<\/template><\/code><\/pre>\n\n\n\n
        \u56e0\u6b64\uff0c\u8be5\u5c5e\u6027\u4f1a\u5bfc\u81f4\u5143\u7d20\u5448\u73b0\u4e3a \u3002spanProps<\/code><c-child class=\"spanclass\" id=\"mySpan\"><\/c-child><\/code><\/p>\n\n\n\n
        \/\/ app.js\nimport { LightningElement } from \"lwc\";\n\nexport default class extends LightningElement {\n  spanProps = { className: \"spanclass\", id: \"myspan\" };\n}<\/code><\/pre>\n\n\n\n
        \u5c06\u6807\u8bb0\u4f20\u9012\u5230\u63d2\u69fd\u4e2d<\/h1>\n\n\n\n
        \u5c06\u69fd\u6dfb\u52a0\u5230\u7ec4\u4ef6\u7684 HTML \u6587\u4ef6\u4e2d\uff0c\u4ee5\u4fbf\u7236\u7ec4\u4ef6\u53ef\u4ee5\u5c06\u6807\u8bb0\u4f20\u9012\u5230\u7ec4\u4ef6\u4e2d\u3002\u4e00\u4e2a\u7ec4\u4ef6\u53ef\u4ee5\u6709\u96f6\u4e2a\u6216\u591a\u4e2a\u63d2\u69fd\u3002<\/p>\n\n\n\n
        \u63d2\u69fd \uff08\uff09 \u662f\u7236\u7ec4\u4ef6\u4f20\u9012\u5230\u7ec4\u4ef6\u4e3b\u4f53\u4e2d\u7684\u6807\u8bb0\u7684\u5360\u4f4d\u7b26\u3002<slot><\/slot><\/code><\/p>\n\n\n\n
        \u91cd\u8981<\/p>\n\n\n\n
        \u60a8\u65e0\u6cd5\u5c06 Aura \u7ec4\u4ef6\u4f20\u9012\u5230\u63d2\u69fd\u4e2d\u3002\u5982\u679c\u5c06 Lightning Web \u7ec4\u4ef6\u5d4c\u5957\u5728 Aura \u7ec4\u4ef6\u4e2d\uff0c\u5219\u4e5f\u65e0\u6cd5\u5c06\u5176\u4f20\u9012\u5230\u63d2\u69fd\u4e2d\u3002<\/p>\n\n\n\n
        \u672a\u547d\u540d\u63d2\u69fd<\/h2>\n\n\n\n
        \u6b64\u793a\u4f8b\u6709\u4e00\u4e2a\u672a\u547d\u540d\u7684\u63d2\u69fd\u3002\u672a\u547d\u540d\u7684\u63d2\u69fd\u4f7f\u7528\u8be5\u5143\u7d20\u4f5c\u4e3a\u7236\u7ec4\u4ef6\u4f20\u9012\u5230 \u4e3b\u4f53\u4e2d\u7684\u4efb\u4f55\u6807\u8bb0\u7684\u5360\u4f4d\u7b26\u3002<slot><\/code>c-slot-demo<\/code><\/p>\n\n\n\n
        <!-- slotDemo.html -->\n<template>\n  <h1>Add content to slot<\/h1>\n  <div>\n    <slot><\/slot>\n  <\/div>\n<\/template><\/code><\/pre>\n\n\n\n
        \u4e0b\u9762\u662f\u4f7f\u7528 .c-slot-demo<\/code><\/p>\n\n\n\n
        <!-- slotWrapper.html -->\n<template>\n  <c-slot-demo>\n    <p>content from parent<\/p>\n  <\/c-slot-demo>\n<\/template><\/code><\/pre>\n\n\n\n
        \u5448\u73b0\u65f6\uff0c\u672a\u547d\u540d\u7684\u63d2\u69fd\u5c06\u66ff\u6362\u4e3a\u4f20\u9012\u5230 \u6b63\u6587\u4e2d\u7684\u6807\u8bb0\u3002\u4e0b\u9762\u662f \u7684\u6e32\u67d3\u8f93\u51fa\u3002c-slot-demo<\/code>c-slot-demo<\/code>c-slot-wrapper<\/code><\/p>\n\n\n\n
        <h1>Add content to slot<\/h1>\n<div>\n  <slot>\n    <p>content from parent<\/p>\n  <\/slot>\n<\/div><\/code><\/pre>\n\n\n\n
        \u5982\u679c\u7ec4\u4ef6\u5177\u6709\u591a\u4e2a\u672a\u547d\u540d\u69fd\uff0c\u5219\u4f20\u9012\u5230\u7ec4\u4ef6\u4e3b\u4f53\u4e2d\u7684\u6807\u8bb0\u5c06\u63d2\u5165\u5230\u6240\u6709\u672a\u547d\u540d\u69fd\u4e2d\u3002\u4f46\u662f\uff0c\u4e00\u4e2a\u7ec4\u4ef6\u901a\u5e38\u6709\u96f6\u4e2a\u6216\u4e00\u4e2a\u672a\u547d\u540d\u7684\u63d2\u69fd\u3002<\/p>\n\n\n\n
        \u547d\u540d\u63d2\u69fd<\/h2>\n\n\n\n
        \u6b64\u793a\u4f8b\u7ec4\u4ef6\u6709\u4e24\u4e2a\u547d\u540d\u69fd\u548c\u4e00\u4e2a\u672a\u547d\u540d\u69fd\u3002<\/p>\n\n\n\n
        <!-- namedSlots.html -->\n<template>\n  <p>First Name: <slot name=\"firstName\">Default first name<\/slot><\/p>\n  <p>Last Name: <slot name=\"lastName\">Default last name<\/slot><\/p>\n  <p>Description: <slot>Default description<\/slot><\/p>\n<\/template><\/code><\/pre>\n\n\n\n
        \u60a8\u53ef\u4ee5\u4e3a HTML \u5143\u7d20\u7684\u5c5e\u6027\u8bbe\u7f6e\u52a8\u6001\u503c\u3002\u5728\u8fd9\u91cc\uff0c\u8be5\u5143\u7d20\u7684\u5c5e\u6027\u8bbe\u7f6e\u4e3a\u53d8\u91cf \u3002slot<\/code><span><\/code>slot<\/code>dynamicName<\/code><\/p>\n\n\n\n
        <template>\n  <c-item>\n    <span slot={dynamicName}><\/span>\n  <\/c-item>\n<\/template><\/code><\/pre>\n\n\n\n
        \u4f20\u9012\u5230\u5c5e\u6027\u4e2d\u7684\u52a8\u6001\u503c\u88ab\u5f3a\u5236\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5c06\u6570\u5b57 4 \u4f20\u9012\u7ed9\u5c5e\u6027\uff0c\u5219\u8be5\u5c5e\u6027\u5c06\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32 \u3002\u5982\u679c\u4f20\u5165\u65e0\u6cd5\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u7684\u6570\u636e\u7c7b\u578b\uff08\u5982 \uff09\uff0c\u5219\u4f1a\u5f15\u53d1 TypeError\u3002slot<\/code>\"4\"<\/code>Symbol()<\/code><\/p>\n\n\n\n
        \u6b64\u66f4\u6539\u4e0d\u4f1a\u5f71\u54cd\u5143\u7d20\u7684\u5c5e\u6027\u3002\u4f8b\u5982\uff0c\u60a8\u4ecd\u7136\u5fc5\u987b\u5c06\u9759\u6001\u5b57\u7b26\u4e32\u4f20\u9012\u5230\u5143\u7d20\u7684\u5c5e\u6027\u4e2d\u3002<slot><\/code>name<\/code><slot><\/code><\/p>\n\n\n\n
        <template>\n  <slot name=\"\u201dstaticName\u201d\"> <\/slot>\n<\/template><\/code><\/pre>\n\n\n\n
        \u4e0b\u9762\u662f\u4f7f\u7528 .c-named-slots<\/code><\/p>\n\n\n\n
        <!-- slotsWrapper.html -->\n<template>\n  <c-named-slots>\n    <span slot=\"firstName\">Willy<\/span>\n    <span slot=\"lastName\">Wonka<\/span>\n    <span>Chocolatier<\/span>\n  <\/c-named-slots>\n<\/template><\/code><\/pre>\n\n\n\n
        \u8be5\u7ec4\u4ef6\u901a\u8fc7\uff1ac-slots-wrapper<\/code><\/p>\n\n\n\n
          \n
        • Willy<\/code>\u8fdb\u5165\u63d2\u69fdfirstName<\/code><\/li>\n\n\n\n
        • Wonka<\/code>\u8fdb\u5165\u63d2\u69fdlastName<\/code><\/li>\n\n\n\n
        • Chocolatier<\/code>\u8fdb\u5165\u672a\u547d\u540d\u7684\u63d2\u69fd<\/li>\n<\/ul>\n\n\n\n
          \u4e0b\u9762\u662f\u5448\u73b0\u7684\u8f93\u51fa\u3002<\/p>\n\n\n\n
          <c-named-slots>\n  <p>\n    First Name:\n    <slot name=\"firstName\"><span slot=\"firstName\">Willy<\/span><\/slot>\n  <\/p>\n  <p>\n    Last Name:\n    <slot name=\"lastName\"><span slot=\"lastName\">Wonka<\/span><\/slot>\n  <\/p>\n  <p>\n    Description:\n    <slot><span>Chocolatier<\/span><\/slot>\n  <\/p>\n<\/c-named-slots><\/code><\/pre>\n\n\n\n
          \u901a\u8fc7\u63d2\u69fd\u4f20\u9012\u7684\u8bbf\u95ee\u5143\u7d20<\/h2>\n\n\n\n
          \u8be5\u5143\u7d20\u662f\u7ec4\u4ef6\u5f71\u5b50\u6811\u7684\u4e00\u90e8\u5206\u3002\u8981\u8bbf\u95ee\u5176\u5f71\u5b50\u6811\u4e2d\u7684\u5143\u7d20\uff0c\u7ec4\u4ef6\u5c06\u8c03\u7528 \u548c .<slot><\/slot><\/code>this.template.querySelector()<\/code>this.template.querySelectorAll()<\/code><\/p>\n\n\n\n
          \u4f46\u662f\uff0c\u4f20\u9012\u5230\u63d2\u69fd\u4e2d\u7684 DOM \u5143\u7d20\u4e0d\u662f\u7ec4\u4ef6\u5f71\u5b50\u6811\u7684\u4e00\u90e8\u5206\u3002\u8981\u8bbf\u95ee\u901a\u8fc7\u63d2\u69fd\u4f20\u9012\u7684\u5143\u7d20\uff0c\u7ec4\u4ef6\u5c06\u8c03\u7528 \u548c .this.querySelector()<\/code>this.querySelectorAll()<\/code><\/p>\n\n\n\n
          \u6b64\u793a\u4f8b\u6f14\u793a\u5982\u4f55\u5c06 DOM \u5143\u7d20\u4ece\u5b50\u7ec4\u4ef6\u7684\u4e0a\u4e0b\u6587\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\u3002\u4e3a \u548c \u63d0\u4f9b\u9009\u62e9\u5668\u540d\u79f0\uff0c\u4f8b\u5982\u5143\u7d20\u3002this.querySelector()<\/code>this.querySelectorAll()<\/code><\/p>\n\n\n\n
          \/\/ namedSlots.js\nimport { LightningElement } from \"lwc\";\n\nexport default class NamedSlots extends LightningElement {\n  renderedCallback() {\n    this.querySelector(\"span\"); \/\/ <span>push the green button.<\/span>\n    this.querySelectorAll(\"span\"); \/\/ [<span>push the green button<\/span>, <span>push the red button<\/span>]\n  }\n}<\/code><\/pre>\n\n\n\n
          \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u63a5\u53d7\u5143\u7d20 .querySelector<\/code>span<\/code><\/p>\n\n\n\n
          \u6ce8\u610f<\/p>\n\n\n\n
          \u4e0d\u8981\u5c06 \u4f20\u9012\u7ed9\u67e5\u8be2\u65b9\u6cd5\uff0c\u4f8b\u5982 \u3002\u5448\u73b0 HTML \u6a21\u677f\u65f6\uff0c\u53ef\u4ee5\u5c06\u503c\u8f6c\u6362\u4e3a\u5168\u5c40\u552f\u4e00\u503c\u3002\u5982\u679c\u5728 JavaScript \u4e2d\u4f7f\u7528\u9009\u62e9\u5668\uff0c\u5219\u5b83\u4e0e\u8f6c\u6362\u540e\u7684 .id<\/code>querySelector<\/code>id<\/code>id<\/code>id<\/code><\/p>\n\n\n\n
          \u6709\u6761\u4ef6\u5730\u6e32\u67d3\u63d2\u69fd<\/h2>\n\n\n\n
          \u8981\u6709\u6761\u4ef6\u5730\u5448\u73b0\u63d2\u69fd\uff0c\u8bf7\u4f7f\u7528 \u3001 \u548c\/\u6216\u6307\u4ee4\u5c06\u63d2\u69fd\u5d4c\u5957\u5728\u6807\u8bb0\u4e2d\u3002<template><\/code>lwc:if<\/code>lwc:else<\/code>lwc:elseif<\/code><\/p>\n\n\n\n
          <template>\n  <template lwc:if={expression}>\n    <div class=\"my-class\">\n      <slot><\/slot>\n    <\/div>\n  <\/template>\n  <template lwc:else>\n    <slot><\/slot>\n  <\/template>\n<\/template><\/code><\/pre>\n\n\n\n
          \u6a21\u677f\u7f16\u8bd1\u5668\u5c06\u6761\u4ef6\u6307\u4ee4\u89c6\u4e3a\u6709\u6548\u7684\u7528\u4f8b\uff0c\u5e76\u4e14\u77e5\u9053\u4e0d\u4f1a\u5448\u73b0\u4e24\u6b21\u3002<slot><\/code><\/p>\n\n\n\n
          \u5982\u679c\u4f7f\u7528 legacy \u548c \u6307\u4ee4\uff0c\u7f16\u8bd1\u5668\u4f1a\u8b66\u544a\u4f60\u91cd\u590d\u7684\u63d2\u69fd\uff0c\u56e0\u4e3a\u4e0d\u6e05\u695a\u662f\u5426\u53ea\u4f1a\u5448\u73b0\u4e00\u6b21\u3002\u4f8b\u5982\uff0cgetter \u6bcf\u6b21\u7684\u8fd4\u56de\u503c\u90fd\u53ef\u80fd\u4e0d\u4e00\u81f4\u3002if:true<\/code>if:false<\/code><slot><\/code>expression<\/code><\/p>\n\n\n\n
          \u5728 slotchange \u4e0a\u8fd0\u884c\u4ee3\u7801<\/h2>\n\n\n\n
          \u6240\u6709\u5143\u7d20\u90fd\u652f\u6301\u8be5\u4e8b\u4ef6\u3002\u5f53\u5143\u7d20\u4e2d\u8282\u70b9\u7684\u76f4\u63a5\u5b50\u8282\u70b9\u53d1\u751f\u66f4\u6539\u65f6\uff0c\u5c06\u89e6\u53d1\u8be5\u4e8b\u4ef6\u3002\u4f8b\u5982\uff0c\u5f53\u8ffd\u52a0\u6216\u5220\u9664\u65b0\u5185\u5bb9\u65f6\uff0c\u4f1a\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u3002\u53ea\u6709\u5143\u7d20\u652f\u6301\u6b64\u4e8b\u4ef6\u3002<slot><\/code>slotchange<\/code>slotchange<\/code><slot><\/code><slot><\/code><\/p>\n\n\n\n
          \u5143\u7d20\u7684\u5b50\u5143\u7d20\u4e2d\u7684\u66f4\u6539\u4e0d\u4f1a\u89e6\u53d1\u4e8b\u4ef6\u3002<slot><\/code>slotchange<\/code><\/p>\n\n\n\n
          \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u5143\u7d20\u5904\u7406\u4e8b\u4ef6\u3002<slot><\/code>slotchange<\/code><\/p>\n\n\n\n
          <!-- container.html -->\n<template>\n  <slot onslotchange={handleSlotChange}><\/slot>\n<\/template><\/code><\/pre>\n\n\n\n
          \/\/ container.js\nhandleSlotChange (e) {\n   console.log(\"New slotted content has been added or removed!\");\n}<\/code><\/pre>\n\n\n\n
          \u5143\u4ef6\u88ab\u4f20\u9012\u5230\u63d2\u69fd\u4e2d\u3002c-child<\/code><\/p>\n\n\n\n
          <c-container>\n  <c-child><\/c-child>\n  <template lwc:if={addOneMore}>\n    <c-child><\/c-child>\n  <\/template>\n<\/c-container><\/code><\/pre>\n\n\n\n
          \u5982\u679c\u8be5\u6807\u5fd7\u8bbe\u7f6e\u4e3a True\uff0c\u5219\u63a7\u5236\u53f0\u5c06\u5728\u9996\u6b21\u5448\u73b0\u7ec4\u4ef6\u65f6\u6253\u5370\u3002addOneMore<\/code><\/p>\n\n\n\n
          <!-- child.html -->\n<template>\n  <button onclick={handleClick}>Toggle Footer<\/button>\n  <template lwc:if={showFooter}>\n    <footer>Footer content<\/footer>\n  <\/template>\n<\/template><\/code><\/pre>\n\n\n\n
          \u5373\u4f7f\u4e3a true \u5e76\u4e14\u8ffd\u52a0\u4e86\u9875\u811a\u5143\u7d20\uff0c\u4e5f\u4e0d\u4f1a\u89e6\u53d1\u8be5\u4e8b\u4ef6\u3002slotchange<\/code>showFooter<\/code><\/p>\n\n\n\n
          \u4f7f\u7528\u63d2\u69fd\u4e0e\u6570\u636e\u7ec4\u5408\u7ec4\u4ef6<\/h1>\n\n\n\n
          \u521b\u5efa\u5305\u542b\u5176\u4ed6\u7ec4\u4ef6\u7684\u7ec4\u4ef6\u65f6\uff0c\u8bf7\u8003\u8651\u7ec4\u4ef6\u5c42\u6b21\u7ed3\u6784\u7684\u751f\u547d\u5468\u671f\uff0c\u4f7f\u7528\u5e26\u6709\u69fd\u7684\u58f0\u660e\u6027\u65b9\u6cd5\uff0c\u6216\u6570\u636e\u9a71\u52a8\u65b9\u6cd5\uff0c\u5176\u4e2d\u5b50\u7ec4\u4ef6\u5bf9\u5176\u7236\u7ec4\u4ef6\u7684\u6570\u636e\u66f4\u6539\u505a\u51fa\u53cd\u5e94\u3002<\/p>\n\n\n\n
          \u4ee5\u58f0\u660e\u65b9\u5f0f\u6784\u5efa\u7ec4\u4ef6\u7684\u5e38\u89c1\u6a21\u5f0f\u5982\u4e0b\u6240\u793a\u3002<\/p>\n\n\n\n
          <c-parent>\n  <c-custom-child><\/c-custom-child>\n  <c-custom-child><\/c-custom-child>\n<\/c-parent><\/code><\/pre>\n\n\n\n
          \u6b64\u793a\u4f8b\u5177\u6709\u4f7f\u7528\u5143\u7d20\u7684\u7ec4\u4ef6\u3002\u5c3d\u7ba1\u5bf9\u4f7f\u7528\u8005\u6765\u8bf4\u5f88\u65b9\u4fbf\uff0c\u4f46\u60a8\u5fc5\u987b\u7ba1\u7406\u901a\u8fc7\u5143\u7d20\u4f20\u9012\u7684\u5185\u5bb9\u7684\u751f\u547d\u5468\u671f\u3002c-parent<\/code>slot<\/code>slot<\/code><\/p>\n\n\n\n
          \u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u7ba1\u7406\u4f20\u9012\u5230\u69fd\u4e2d\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n
            \n
          • \u4f7f\u7528\u00a0slotchange<\/code>\u00a0\u4e8b\u4ef6\u3002\u8fd9\u662f\u63a8\u8350\u7684\u65b9\u6cd5\u3002 \u901a\u8fc7 DOM \u5411\u4e0a\u5192\u6ce1\uff0c\u4f46\u4e0d\u4f1a\u8d8a\u8fc7\u9634\u5f71\u8fb9\u754c\uff0c\u4ece\u800c\u4f7f\u5305\u542b\u63d2\u69fd\u7684\u7236\u7ec4\u4ef6\u80fd\u591f\u5bf9\u5176\u505a\u51fa\u53cd\u5e94\u3002slotchange<\/code><\/li>\n\n\n\n
          • \u4f7f\u7528\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u5c06\u5b50\u7ec4\u4ef6\u7684\u66f4\u6539\u901a\u77e5\u7236\u7ec4\u4ef6\uff0c\u8fd9\u4f7f\u60a8\u80fd\u591f\u5c06\u8981\u4e0e\u4e4b\u4ea4\u4e92\u7684\u7ec4\u4ef6\u4e0a\u7684\u65b9\u6cd5\u8bbe\u4e3a\u79c1\u6709\u3002\u6211\u4eec\u4e0d\u518d\u5efa\u8bae\u4f7f\u7528\u6b64\u65b9\u6cd5\uff0c\u56e0\u4e3a\u6211\u4eec\u6b63\u5728\u9010\u6b65\u8fc1\u79fb\u7ec4\u4ef6\u4ee5\u4f7f\u7528\u672c\u673a\u5f71\u5b50\uff0c\u8fd9\u4f1a\u5f3a\u5236\u7ec4\u4ef6\u4f7f\u7528\u8be5\u4e8b\u4ef6\u3002slotchange<\/code><\/li>\n<\/ul>\n\n\n\n
            \u5c06 slotchange \u4e8b\u4ef6\u4e0e\u63d2\u69fd\u4e00\u8d77\u4f7f\u7528<\/h2>\n\n\n\n
            \u4f7f\u7528\u5e26\u6709\u69fd\u7684\u4e8b\u4ef6\uff0c\u53ef\u4ee5\u7ba1\u7406\u7236\u7ec4\u4ef6\u548c\u5b50\u7ec4\u4ef6\u4e4b\u95f4\u5185\u5bb9\u7684\u751f\u547d\u5468\u671f\u3002\u6b64\u6a21\u5f0f\u7684\u4e00\u4e2a\u793a\u4f8b\u662f\u5177\u6709\u5b50\u7ec4\u4ef6\u7684\u57fa\u672c\u7ec4\u4ef6\u3002slotchange<\/code>slot<\/code>lightning-button-group<\/code>lightning-button<\/code><\/p>\n\n\n\n
            <lightning-button-group>\n  <lightning-button label=\"Refresh\"><\/lightning-button>\n  <lightning-button label=\"Edit\"><\/lightning-button>\n  <lightning-button label=\"Save\"><\/lightning-button>\n<\/lightning-button-group><\/code><\/pre>\n\n\n\n
            \u7236\u7ec4\u4ef6\u5305\u542b\u4e00\u4e2a\u5e26\u6709\u4e8b\u4ef6\u7684\u5143\u7d20\uff0c\u7528\u4e8e\u7ba1\u7406\u4f20\u5165\u5185\u5bb9\u7684\u751f\u547d\u5468\u671f\u3002lightning-button-group<\/code>slot<\/code>onslotchange<\/code><\/p>\n\n\n\n
            <!-- buttonGroup.html -->\n<template>\n  <slot onslotchange={handleSlotChange}><\/slot>\n<\/template><\/code><\/pre>\n\n\n\n
            \u6ce8\u610f<\/p>\n\n\n\n
            \u57fa\u672c\u7ec4\u4ef6\u793a\u4f8b\u4ec5\u7528\u4e8e\u6f14\u793a\u76ee\u7684\u3002\u57fa\u672c\u7ec4\u4ef6\u5185\u90e8\u7ed3\u6784\u53ef\u80fd\u4f1a\u53d1\u751f\u53d8\u5316\u3002\u6211\u4eec\u8bb0\u5f55\u4e86\u5bf9\u7ec4\u4ef6\u529f\u80fd\u548c\u884c\u4e3a\u7684\u66f4\u6539\uff0c\u4f46\u4e0d\u8bb0\u5f55\u5bf9\u5176\u5185\u90e8\u7684\u66f4\u6539\u3002\u6709\u5173\u57fa\u672c\u7ec4\u4ef6\u7684\u516c\u5171\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u8bf7\u53c2\u9605\u7ec4\u4ef6\u53c2\u8003\u3002<\/p>\n\n\n\n
            \u5f53\u69fd\u7684\u5185\u5bb9\u53d1\u751f\u66f4\u6539\u65f6\uff0c\u5904\u7406\u7a0b\u5e8f\u5c06\u5904\u7406\u5bf9\u69fd\u5143\u7d20\u7684\u66f4\u65b0\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7236\u7ec4\u4ef6\u6839\u636e\u5b50\u7ec4\u4ef6\u5728\u7ec4\u4e2d\u7684\u663e\u793a\u987a\u5e8f\uff08\u7b2c\u4e00\u4e2a\u3001\u4e2d\u95f4\u3001\u6700\u540e\u4e00\u4e2a\uff0c\u6216\u8005\u5b83\u662f\u5426\u662f\u7ec4\u4e2d\u7684\u552f\u4e00\u6309\u94ae\uff09\u6765\u786e\u5b9a\u5b50\u7ec4\u4ef6\u4e0a\u7684 CSS \u7c7b\u3002slotchange<\/code>lightning-button-group<\/code>lightning-button<\/code><\/p>\n\n\n\n
            \/\/ buttonGroup.js\nhandleSlotChange(event) {\n  const slot = event.target;\n  const children = slot.assignedElements() || [];\n\n  \/\/ Loop through each child and\n  \/\/ set the order value based on position in the group\n  this.updateGroupOrder(children); }<\/code><\/pre>\n\n\n\n
            \u4f7f\u7528 getter \u4fee\u6539\u6309\u94ae\u7c7b\u3002<\/p>\n\n\n\n
            <!-- button.html -->\n<template>\n  <button class={computedButtonClass} ...>{label}<\/button>\n<\/template><\/code><\/pre>\n\n\n\n
            \/\/ button.js\nget computedButtonClass() {\n    return classSet('slds-button')\n    .add({\n        \/\/ Other button classes here\n        'slds-button_first': this._order === 'first',\n        'slds-button_middle': this._order === 'middle',\n        'slds-button_last': this._order === 'last'\n    })\n    .toString();\n}<\/code><\/pre>\n\n\n\n
            \u89e6\u53d1\u5bc4\u5b58\u5668\u4e8b\u4ef6\uff0c\u4ee5\u4fbf\u7ec4\u4ef6\u53ef\u4ee5\u6ce8\u518c\u7ec4\u4ef6\u3002lightning-button-group<\/code>lightning-button<\/code><\/p>\n\n\n\n
            \/\/ button.js\nconnectedCallback() {\n  this._connected = true;\n    const privatebuttonregister = new CustomEvent('privatebuttonregister', {\n        bubbles: true,\n        detail: {\n            callbacks: {\n                setOrder: this.setOrder.bind(this),\n                setDeRegistrationCallback: (deRegistrationCallback) => {\n                    this._deRegistrationCallback = deRegistrationCallback;\n                }\n            }\n        }\n    });\n\n    this.dispatchEvent(privatebuttonregister);\n}<\/code><\/pre>\n\n\n\n
            \u5f53\u5b50\u7ec4\u4ef6\u4e0d\u518d\u53ef\u7528\u65f6\u901a\u77e5\u7236\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
            \/\/ button.js\ndisconnectedCallback() {\n  this._connected = false;\n  if (this._deRegistrationCallback) {\n      this._deRegistrationCallback();\n  }\n}<\/code><\/pre>\n\n\n\n
            \u4f7f\u7528\u6570\u636e\u9a71\u52a8\u578b\u65b9\u6cd5<\/h2>\n\n\n\n
            \u4f7f\u7528\u6570\u636e\u9a71\u52a8\u7684\u65b9\u6cd5\uff0c\u5f53\u6570\u636e\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u7ec4\u4ef6\u4f1a\u4ee5\u53cd\u5e94\u6027\u65b9\u5f0f\u83b7\u53d6\u66f4\u6539\u3002<\/p>\n\n\n\n
            \u6b64\u793a\u4f8b\u4f7f\u7528\u6570\u636e\u9a71\u52a8\u65b9\u6cd5\u7f16\u5199\u5b50\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
            <template>\n  <div class=\"c-parent\">\n    <template for:each={itemsData} for:item=\"itemData\">\n      <c-child onclick={onItemSelect} id={itemData.id} key={itemData.id}> <\/c-child>\n    <\/template>\n  <\/div>\n<\/template><\/code><\/pre>\n\n\n\n
            \u82e5\u8981\u4f20\u5165\u6570\u636e\uff0c\u8bf7\u4f7f\u7528 JavaScript \u5bf9\u8c61\u3002\u5b50\u7ec4\u4ef6\u4ec5\u5bf9\u6765\u81ea\u5176\u7236\u7ec4\u4ef6\u7684\u6570\u636e\u66f4\u6539\u505a\u51fa\u53cd\u5e94\u3002<\/p>\n\n\n\n
            itemsData = [\n    {\n        label : 'custom label 1',\n        id : 'custom-id-1'\n        selected : false\n    },\n    {\n        label : 'custom label 2',\n        id : 'custom-id-2'\n        selected : false\n    }\n]<\/code><\/pre>\n\n\n\n
            \u5f53\u60a8\u6709\u590d\u6742\u7684\u7528\u4f8b\u65f6\uff0c\u5efa\u8bae\u91c7\u7528\u6570\u636e\u9a71\u52a8\u7684\u65b9\u6cd5\u3002\u4f7f\u7528\u6570\u636e\u9a71\u52a8\u65b9\u6cd5\u521b\u5efa\u7684\u57fa\u672c\u7ec4\u4ef6\u7684\u4e00\u4e2a\u793a\u4f8b\u662f\u00a0lightning-datatable<\/code>\u3002<\/p>\n\n\n\n
            \u67e5\u770b\u7ec4\u4ef6\u4f9d\u8d56\u5173\u7cfb<\/h1>\n\n\n\n
            \u4f7f\u7528\u4f9d\u8d56\u9879\u6811\u67e5\u770b\u5668\u53ef\u67e5\u770b\u7ec4\u4ef6\u4f7f\u7528\u7684\u81ea\u5b9a\u4e49\u7ec4\u4ef6\u548c Apex \u7c7b\u3002\u60a8\u53ef\u4ee5\u5feb\u901f\u67e5\u770b\u7ec4\u4ef6\u7684\u7ed3\u6784\u5e76\u5bfc\u822a\u5230\u5176\u4f9d\u8d56\u9879\u7684\u6e90\u3002<\/p>\n\n\n\n
            \u5728\u201c\u8bbe\u7f6e\u201d\u7684\u201c\u5feb\u901f\u67e5\u627e\u201d\u6846\u4e2d\uff0c\u8f93\u5165 \uff0c\u7136\u540e\u9009\u62e9 Lightning \u7ec4\u4ef6<\/strong>\u3002Lightning Components<\/code><\/p>\n\n\n\n
              \n
            • \u8981\u5728\u8be6\u7ec6\u4fe1\u606f\u9875\u9762\u4e0a\u67e5\u770b Lightning Web \u7ec4\u4ef6\u7684\u4f9d\u8d56\u5173\u7cfb\uff0c\u8bf7\u5355\u51fb\u5176\u540d\u79f0\u65c1\u8fb9\u7684 V \u5f62\u56fe\u6807\uff0c\u5c55\u5f00 Lightning Web \u7ec4\u4ef6\u884c\u3002<\/li>\n\n\n\n
            • \u82e5\u8981\u67e5\u770b\u5176\u4e2d\u4e00\u4e2a\u4f9d\u8d56\u9879\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u5355\u51fb\u201c\u540d\u79f0\u201d\u5217\u4e2d\u7684\u94fe\u63a5\u3002<\/li>\n<\/ul>\n\n\n\n
              \"\u67e5\u770b\u7ec4\u4ef6\u4f9d\u8d56\u5173\u7cfb\u6811\"\/<\/figure>\n\n\n\n
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