{"id":38619,"date":"2022-11-11T06:08:11","date_gmt":"2023-03-18T21:05:25","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%b1%e4%ba%8eangular%e6%b2%a1%e6%9c%89props%e6%a6%82%e5%bf%b5%ef%bc%8c%e5%9b%a0%e6%ad%a4%e9%9c%80%e8%a6%81%e5%ad%a6%e4%b9%a0props%e3%80%82\/"},"modified":"2024-01-15T09:58:47","modified_gmt":"2024-01-15T01:58:47","slug":"%e7%94%b1%e4%ba%8eangular%e6%b2%a1%e6%9c%89props%e6%a6%82%e5%bf%b5%ef%bc%8c%e5%9b%a0%e6%ad%a4%e9%9c%80%e8%a6%81%e5%ad%a6%e4%b9%a0props%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%b1%e4%ba%8eangular%e6%b2%a1%e6%9c%89props%e6%a6%82%e5%bf%b5%ef%bc%8c%e5%9b%a0%e6%ad%a4%e9%9c%80%e8%a6%81%e5%ad%a6%e4%b9%a0props%e3%80%82\/","title":{"rendered":"\u7531\u4e8eAngular\u6ca1\u6709props\u6982\u5ff5\uff0c\u56e0\u6b64\u9700\u8981\u5b66\u4e60props"},"content":{"rendered":"

\u6211\u6b63\u5728\u4f7f\u7528ChatGPT\u5b66\u4e60\u3002
\n\u9996\u5148\uff0c\u6211\u7ecf\u5e38\u5728Angular\u4e0a\u5f00\u53d1\u3002<\/p>\n

\u5728Angular\u4e2d\uff0c\u662f\u5426\u6709props\u5c5e\u6027\uff1f<\/h2>\n

\u5728Angular\u4e2d\uff0c\u5b58\u5728\u7740\u4e0eReact\u7684props\u76f4\u63a5\u5bf9\u5e94\u7684\u6982\u5ff5\uff0c\u5373\u300c\u8f93\u5165\uff08Inputs\uff09\u300d\u548c\u300c\u8f93\u51fa\uff08Outputs\uff09\u300d\u3002<\/p>\n

\u5728React\u4e2d\uff0c\u4f7f\u7528props\u5c06\u6570\u636e\u4ece\u7236\u7ec4\u4ef6\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\u3002\u540c\u6837\u5730\uff0c\u5728Angular\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528@Input()\u88c5\u9970\u5668\u5c06\u6570\u636e\u4ece\u7236\u7ec4\u4ef6\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\u3002<\/p>\n

\u6839\u636e\u8f93\u5165\u548c\u8f93\u51fa\u7684\u5b9e\u9645\u793a\u4f8b\u6765\u4f7f\u7528\u65b9\u6cd5\u3002<\/h2>\n

\u5f53\u7136\uff0c\u6211\u4eec\u4f1a\u8be6\u7ec6\u8bf4\u660e\u4f7f\u7528Angular\u7684@Input()\u548c@Output()\u88c5\u9970\u5668\u5728\u7236\u5b50\u7ec4\u4ef6\u4e4b\u95f4\u8fdb\u884c\u6570\u636e\u4f20\u9012\u548c\u4e8b\u4ef6\u4f20\u64ad\u7684\u65b9\u6cd5\u3002<\/p>\n

\u4f7f\u7528@Input()\u5c06\u6570\u636e\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\u3002<\/h3>\n

\u8ba9\u6211\u4eec\u770b\u4e00\u4e0bParentComponent\u5c06\u6570\u636e\u4f20\u9012\u7ed9ChildComponent\u7684\u793a\u4f8b\u3002<\/p>\n

\u7236\u7ec4\u4ef6<\/p>\n

@<\/span>Component<\/span>({<\/span>\r\n  selector<\/span>:<\/span> '<\/span>app-parent<\/span>'<\/span>,<\/span>\r\n  template<\/span>:<\/span> `\r\n    <app-child [childMessage]=\"parentMessage\"><\/app-child>\r\n  `<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> ParentComponent<\/span> {<\/span>\r\n  parentMessage<\/span> =<\/span> '<\/span>Hello from Parent Component!<\/span>'<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
ChildComponent: \u5b50\u7ec4\u4ef6<\/p>\n
@<\/span>Component<\/span>({<\/span>\r\n  selector<\/span>:<\/span> '<\/span>app-child<\/span>'<\/span>,<\/span>\r\n  template<\/span>:<\/span> `\r\n    <div>{{ childMessage }}<\/div>\r\n  `<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> ChildComponent<\/span> {<\/span>\r\n  @<\/span>Input<\/span>()<\/span> childMessage<\/span>:<\/span> string<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cParentComponent\u901a\u8fc7\u540d\u4e3achildMessage\u7684@Input()\u5c06\u6570\u636e\u4f20\u9012\u7ed9ChildComponent\u3002<\/p>\n
\u4f7f\u7528@Output()\u5c06\u4e8b\u4ef6\u4ece\u5b50\u7ec4\u4ef6\u4f20\u64ad\u5230\u7236\u7ec4\u4ef6\u3002<\/h3>\n
\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u5c06\u5b50\u7ec4\u4ef6\u7684\u6309\u94ae\u70b9\u51fb\u4e8b\u4ef6\u4f20\u9012\u7ed9\u7236\u7ec4\u4ef6\u7684\u4f8b\u5b50\u3002<\/p>\n
\u5b50\u7ec4\u4ef6<\/p>\n
import<\/span> {<\/span> Component<\/span>,<\/span> Output<\/span>,<\/span> EventEmitter<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\n\r\n@<\/span>Component<\/span>({<\/span>\r\n  selector<\/span>:<\/span> '<\/span>app-child<\/span>'<\/span>,<\/span>\r\n  template<\/span>:<\/span> `\r\n    <button (click)=\"sendEvent()\">Click me!<\/button>\r\n  `<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> ChildComponent<\/span> {<\/span>\r\n  @<\/span>Output<\/span>()<\/span> childEvent<\/span> =<\/span> new<\/span> EventEmitter<\/span><<\/span>string<\/span>><\/span>();<\/span>\r\n\r\n  sendEvent<\/span>()<\/span> {<\/span>\r\n    this<\/span>.<\/span>childEvent<\/span>.<\/span>emit<\/span>(<\/span>'<\/span>Event from Child Component<\/span>'<\/span>);<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5bb6\u957f\u7ec4\u4ef6<\/p>\n
@<\/span>Component<\/span>({<\/span>\r\n  selector<\/span>:<\/span> '<\/span>app-parent<\/span>'<\/span>,<\/span>\r\n  template<\/span>:<\/span> `\r\n    <app-child (childEvent)=\"handleChildEvent($event)\"><\/app-child>\r\n  `<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> ParentComponent<\/span> {<\/span>\r\n  handleChildEvent<\/span>(<\/span>event<\/span>:<\/span> string<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>event<\/span>);<\/span>  \/\/ Will log: \"Event from Child Component\"<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cChildComponent\u89e6\u53d1\u4e86\u540d\u4e3achildEvent\u7684@Output()\u4e8b\u4ef6\uff0c\u7136\u540eParentComponent\u63a5\u6536\u5230\u4e86\u8fd9\u4e2a\u4e8b\u4ef6\u3002<\/p>\n
\u901a\u8fc7\u4f7f\u7528Angular\u7684@Input()\u548c@Output()\u88c5\u9970\u5668\uff0c\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u7236\u5b50\u7ec4\u4ef6\u95f4\u7684\u6570\u636e\u4f20\u9012\u548c\u4e8b\u4ef6\u4f20\u64ad\u3002<\/p>\n
React\u7684props\u662f\u6307\u5c5e\u6027\u6216\u5c5e\u6027\u5bf9\u8c61\u3002<\/h2>\n
React\u7684props\u6307\u7684\u662f\u4f5c\u4e3aReact\u7ec4\u4ef6\u8f93\u5165\u7684\u6570\u636e\u3002props\u5728\u5c06\u6570\u636e\u4ece\u7236\u7ec4\u4ef6\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\u65f6\u4f7f\u7528\uff0c\u4ee5\u63d0\u9ad8\u7ec4\u4ef6\u7684\u53ef\u91cd\u7528\u6027\u3002props\u662f\u53ea\u8bfb\u7684\uff0c\u4e0d\u5141\u8bb8\u5728\u5b50\u7ec4\u4ef6\u5185\u90e8\u4fee\u6539\u5176\u503c\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5c55\u793aReact props\u57fa\u672c\u4f7f\u7528\u65b9\u6cd5\u7684\u4f8b\u5b50\u3002<\/p>\n
Family component:<\/p>\n
function<\/span> ParentComponent<\/span>()<\/span> {<\/span>\r\n  return<\/span> <<\/span>ChildComponent<\/span> message<\/span>=<\/span>\"<\/span>Hello from Parent!<\/span>\"<\/span> \/><\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b50\u7ec4\u4ef6\uff1a<\/p>\n
function<\/span> ChildComponent<\/span>(<\/span>props<\/span>)<\/span> {<\/span>\r\n  return<\/span> <<\/span>div<\/span>><\/span>{<\/span>props<\/span>.<\/span>message<\/span>}<\/span><<\/span>\/div><\/span>;\r\n<\/span>}<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4eceParentComponent\u4f20\u9012\u4e86\u4e00\u4e2a\u540d\u4e3amessage\u7684props\u5230ChildComponent\u3002\u5728\u5b50\u7ec4\u4ef6\u5185\u90e8\uff0c\u4f7f\u7528\u8fd9\u4e2aprops\u6765\u663e\u793a\u6d88\u606f\u3002<\/p>\n
props\u7684\u7279\u70b9\uff1a<\/p>\n
    \n
  1. \n
      \u53ea\u8bfb\u5c5e\u6027\uff1aprops\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u5728\u7ec4\u4ef6\u5185\u90e8\u4e0d\u80fd\u6539\u53d8\u5b83\u7684\u503c\u3002<\/ol>\n<\/li>\n<\/ol>\n
      \u4ece\u7236\u7ec4\u4ef6\u5230\u5b50\u7ec4\u4ef6\uff1aprops\u59cb\u7ec8\u7528\u4e8e\u4ece\u7236\u7ec4\u4ef6\u5411\u5b50\u7ec4\u4ef6\u4f20\u9012\u6570\u636e\u3002<\/p>\n
      \u53ef\u4ee5\u4f20\u9012\u4efb\u610f\u7c7b\u578b\u7684\u6570\u636e\uff1a\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u3001\u6570\u5b57\u3001\u6570\u7ec4\u3001\u5bf9\u8c61\u3001\u51fd\u6570\u3001React\u5143\u7d20\u7b49\u51e0\u4e4e\u6240\u6709\u7c7b\u578b\u7684\u6570\u636e\u4f5c\u4e3aprops\u4f20\u9012\u3002<\/p>\n
      \u7c7b\u578b\u68c0\u67e5\uff1a\u901a\u8fc7\u4f7f\u7528propTypes\uff0c\u53ef\u4ee5\u6307\u5b9aprops\u7684\u7c7b\u578b\uff0c\u5e76\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u6536\u5230\u4e0e\u7c7b\u578b\u4e0d\u5339\u914d\u76f8\u5173\u7684\u8b66\u544a\u3002<\/p>\n
      \u603b\u4f53\u800c\u8a00\uff0cprops\u662fReact\u7ec4\u4ef6\u4e4b\u95f4\u6570\u636e\u4f20\u9012\u7684\u91cd\u8981\u6982\u5ff5\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u63d0\u9ad8\u7ec4\u4ef6\u7684\u53ef\u91cd\u7528\u6027\u548c\u53ef\u9884\u6d4b\u6027\u3002<\/p>\n
      \u9053\u5177\u7684\u5b9e\u73b0\u793a\u4f8b<\/h2>\n
      \u5f53\u7136\uff0c\u6211\u5c06\u6839\u636e\u4e0a\u8ff0\u7684\u5b9e\u73b0\u793a\u4f8b\uff0c\u8be6\u7ec6\u89e3\u91caReact\u7684props\u7684\u7528\u6cd5\u548c\u5b9e\u73b0\u8981\u70b9\u3002<\/p>\n
      1. props\u7684\u57fa\u672c\u4f7f\u7528\u65b9\u5f0f<\/h3>\n
      \u5982\u679c\u8981\u5c06\u6570\u636e\u4ece\u7236\u7ec4\u4ef6\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\uff0c\u5728\u7236\u7ec4\u4ef6\u7684JSX\u5185\u90e8\uff0c\u5c06\u6570\u636e\u4f5c\u4e3a\u5c5e\u6027\u8fdb\u884c\u8bbe\u7f6e\u3002<\/p>\n
      \u7236\u7ec4\u4ef6<\/p>\n
      function<\/span> ParentComponent<\/span>()<\/span> {<\/span>\r\n  return<\/span> <<\/span>ChildComponent<\/span> message<\/span>=<\/span>\"<\/span>Hello from Parent!<\/span>\"<\/span> \/><\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
      \u5728\u5b50\u7ec4\u4ef6\u4e2d\uff0c\u901a\u8fc7props\u5bf9\u8c61\u63a5\u6536\u6b64\u6570\u636e\u3002<\/p>\n
      \u5b50\u7ec4\u4ef6\uff1a<\/p>\n
      function<\/span> ChildComponent<\/span>(<\/span>props<\/span>)<\/span> {<\/span>\r\n  return<\/span> <<\/span>div<\/span>><\/span>{<\/span>props<\/span>.<\/span>message<\/span>}<\/span><<\/span>\/div><\/span>;\r\n<\/span>}<\/span>\r\n<\/code><\/pre>\n
      2. \u4f20\u9012\u591a\u4e2a\u9053\u5177<\/h3>\n
      \u53ef\u4ee5\u5c06\u4e00\u4e2a\u6216\u591a\u4e2aprops\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\u3002<\/p>\n
      function<\/span> ParentComponent<\/span>()<\/span> {<\/span>\r\n  return<\/span> <<\/span>ChildComponent<\/span> message<\/span>=<\/span>\"<\/span>Hello<\/span>\"<\/span> author<\/span>=<\/span>\"<\/span>Parent<\/span>\"<\/span> \/><\/span>;<\/span>\r\n}<\/span>\r\n\r\nfunction<\/span> ChildComponent<\/span>(<\/span>props<\/span>)<\/span> {<\/span>\r\n  return<\/span> <<\/span>div<\/span>><\/span>{<\/span>props<\/span>.<\/span>message<\/span>}<\/span> from<\/span> {<\/span>props<\/span>.<\/span>author<\/span>}<\/span>!<<\/span>\/div><\/span>;\r\n<\/span>}<\/span>\r\n<\/code><\/pre>\n
      3. \u4e0d\u8981\u5728\u5b50\u7ec4\u4ef6\u5185\u4fee\u6539props\u7684\u503c<\/h3>\n
      props\u662f\u53ea\u8bfb\u7684\uff0c\u65e0\u6cd5\u5728\u5b50\u7ec4\u4ef6\u5185\u76f4\u63a5\u4fee\u6539\u3002\u5982\u679c\u5c1d\u8bd5\u8fdb\u884c\u4fee\u6539\uff0cReact\u4f1a\u629b\u51fa\u9519\u8bef\u3002<\/p>\n
      4. \u8bbe\u7f6e\u9ed8\u8ba4\u7684props<\/h3>\n
      \u60a8\u53ef\u4ee5\u4f7f\u7528defaultProps\u4e3aprops\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u3002<\/p>\n
      function<\/span> ChildComponent<\/span>(<\/span>props<\/span>)<\/span> {<\/span>\r\n  return<\/span> <<\/span>div<\/span>><\/span>{<\/span>props<\/span>.<\/span>message<\/span>}<\/span><<\/span>\/div><\/span>;\r\n<\/span>}<\/span>\r\n\r\nChildComponent<\/span>.<\/span>defaultProps<\/span> =<\/span> {<\/span>\r\n  message<\/span>:<\/span> \"<\/span>Default Message<\/span>\"<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
      5. \u5bf9 props \u8fdb\u884c\u7c7b\u578b\u68c0\u67e5<\/h3>\n
      \u4f7f\u7528`propTypes`\u6765\u4e3aprops\u6307\u5b9a\u7c7b\u578b\uff0c\u5e76\u4e14\u80fd\u591f\u6536\u5230\u6709\u5173\u7c7b\u578b\u4e0d\u5339\u914d\u7684\u8b66\u544a\u3002\u60a8\u9700\u8981\u4f7f\u7528`prop-types`\u5e93\u3002<\/p>\n
      import<\/span> PropTypes<\/span> from<\/span> '<\/span>prop-types<\/span>'<\/span>;<\/span>\r\n\r\nfunction<\/span> ChildComponent<\/span>(<\/span>props<\/span>)<\/span> {<\/span>\r\n  return<\/span> <<\/span>div<\/span>><\/span>{<\/span>props<\/span>.<\/span>message<\/span>}<\/span><<\/span>\/div><\/span>;\r\n<\/span>}<\/span>\r\n\r\nChildComponent<\/span>.<\/span>propTypes<\/span> =<\/span> {<\/span>\r\n  message<\/span>:<\/span> PropTypes<\/span>.<\/span>string<\/span>.<\/span>isRequired<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
      \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u671f\u671bmessage\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5e76\u4e14\u5b83\u662f\u5fc5\u9700\u7684props\u3002<\/p>\n
      6. \u6570\u636e\u4f20\u9012\u4ece\u5b50\u4ee3\u5230\u7236\u4ee3<\/h3>\n
      \u5b50\u7ec4\u4ef6\u53ef\u4ee5\u901a\u8fc7\u5c06\u51fd\u6570\u4f5c\u4e3a props \u63a5\u6536\uff0c\u5e76\u901a\u8fc7\u6267\u884c\u8be5\u51fd\u6570\u5411\u7236\u7ec4\u4ef6\u4f20\u9012\u6570\u636e\u6216\u4e8b\u4ef6\u3002<\/p>\n
      function<\/span> ParentComponent<\/span>()<\/span> {<\/span>\r\n  function<\/span> handleChildClick<\/span>(<\/span>data<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>data<\/span>);<\/span>\r\n  }<\/span>\r\n  \r\n  return<\/span> <<\/span>ChildComponent<\/span> onClick<\/span>=<\/span>{<\/span>handleChildClick<\/span>}<\/span> \/><\/span>;\r\n<\/span>}<\/span>\r\n\r\nfunction<\/span> ChildComponent<\/span>(<\/span>props<\/span>)<\/span> {<\/span>\r\n  return<\/span> <<\/span>button<\/span> onClick<\/span>=<\/span>{()<\/span> =><\/span> props<\/span>.<\/span>onClick<\/span>(<\/span>\"<\/span>Data from Child<\/span>\"<\/span>)}<\/span>><\/span>Click<\/span> me<\/span><<\/span>\/button><\/span>;\r\n<\/span>}<\/span>\r\n<\/code><\/pre>\n
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