{"id":38505,"date":"2023-03-16T19:05:59","date_gmt":"2023-07-01T17:10:53","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e8%af%bbreact%e7%9a%84%e5%ae%98%e6%96%b9%e6%96%87%e6%a1%a3%ef%bc%8c%e4%bb%a5%e6%8f%90%e5%8d%87%e6%88%91%e7%9a%84%e6%b0%b4%e5%b9%b3%ef%bc%81\/"},"modified":"2024-04-29T19:10:02","modified_gmt":"2024-04-29T11:10:02","slug":"%e6%88%91%e6%83%b3%e8%af%bbreact%e7%9a%84%e5%ae%98%e6%96%b9%e6%96%87%e6%a1%a3%ef%bc%8c%e4%bb%a5%e6%8f%90%e5%8d%87%e6%88%91%e7%9a%84%e6%b0%b4%e5%b9%b3%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e8%af%bbreact%e7%9a%84%e5%ae%98%e6%96%b9%e6%96%87%e6%a1%a3%ef%bc%8c%e4%bb%a5%e6%8f%90%e5%8d%87%e6%88%91%e7%9a%84%e6%b0%b4%e5%b9%b3%ef%bc%81\/","title":{"rendered":"\u6211\u60f3\u8bfbReact\u7684\u5b98\u65b9\u6587\u6863\uff0c\u4ee5\u63d0\u5347\u6211\u7684\u6c34\u5e73\uff01"},"content":{"rendered":"

\u6700\u8fd1\u6211\u9605\u8bfb\u4e86React\u5b98\u65b9\u6587\u6863\uff0c\u53d1\u73b0\u4e86\u5f88\u591a\u65b0\u9896\u7684\u60f3\u6cd5\u3002\u6211\u8ba4\u4e3a\u5728\u81ea\u5b66React\u7684\u8fc7\u7a0b\u4e2d\uff0c\u53ef\u80fd\u4f1a\u5ffd\u7565\u8bb8\u591a\u7c7b\u4f3c\u7684\u6280\u5de7\uff0c\u6240\u4ee5\u4eca\u5929\u6211\u60f3\u6574\u7406\u4e00\u4e9b\u76f8\u5173\u6280\u5de7\u3002<\/p>\n

\u6211\u5011\u5e0c\u671b\u76e1\u53ef\u80fd\u7c21\u6f54\u5730\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\u4ecb\u7d39\uff0c\u5982\u679c\u60a8\u60f3\u8981\u66f4\u8a73\u7d30\u7684\u4e86\u89e3\uff0c\u53ef\u4ee5\u9ede\u64ca\u9023\u7d50\u67e5\u770b\u3002<\/p>\n

\u53e6\u5916\uff0c\u57fa\u672c\u4e0a\u6211\u4eec\u662f\u4f7f\u7528\u6700\u65b0\u7248\u7684 React 18 \u8fdb\u884c\u64cd\u4f5c\u9a8c\u8bc1\u3002<\/p>\n

\u53cd\u5e94.\u788e\u7247<\/h1>\n

\u7ec4\u4ef6\u5e94\u8be5\u8fd4\u56deJSX.Element\uff0c\u4f46\u4f7f\u7528React.Fragment\u53ef\u4ee5\u5c06\u591a\u4e2a\u5143\u7d20\u8fde\u63a5\u5728\u4e00\u8d77\u8fd4\u56de\u3002<\/p>\n

return <\/span>(<\/span>\r\n  <><\/span>\r\n    <<\/span>h1<\/span>><\/span>My Profile<\/<\/span>h1<\/span>><\/span>\r\n    <<\/span>p<\/span>><\/span>I am an office worker.<\/<\/span>p<\/span>><\/span>\r\n  <\/><\/span>\r\n);<\/span>\r\n<\/code><\/pre>\n
\u4ee5\u4e0a\u7684\u4ee3\u7801\u662f\u4ee5\u4e0b\u4ee3\u7801\u7684\u7b80\u5199\u5f62\u5f0f\u3002<\/p>\n
return <\/span>(<\/span>\r\n  <<\/span>React<\/span>.<\/span>Fragment<\/span>><\/span>\r\n    <<\/span>h1<\/span>><\/span>My Profile<\/<\/span>h1<\/span>><\/span>\r\n    <<\/span>p<\/span>><\/span>I am an office worker.<\/<\/span>p<\/span>><\/span>\r\n  <\/<\/span>React<\/span>.<\/span>Fragment<\/span>><\/span>\r\n);<\/span>\r\n<\/code><\/pre>\n
\u5728\u4f7f\u7528\u5faa\u73af\u65f6\uff0c\u5728 React.Fragment \u4e0a\u6307\u5b9a key \u5c5e\u6027\u3002<\/p>\n
{<\/span>products<\/span>.<\/span>map<\/span>((<\/span>product<\/span>)<\/span> =><\/span>\r\n  <<\/span>React<\/span>.<\/span>Fragment<\/span> key<\/span>=<\/span>{<\/span>product<\/span>.<\/span>id<\/span>}<\/span>><\/span>\r\n    <<\/span>h2<\/span>><\/span>{<\/span>product<\/span>.<\/span>name<\/span>}<\/span><\/<\/span>h2<\/span>><\/span>\r\n    <<\/span>p<\/span>><\/span>{<\/span>product<\/span>.<\/span>description<\/span>}<\/span><\/<\/span>p<\/span>><\/span>\r\n  <\/<\/span>React<\/span>.<\/span>Fragment<\/span>><\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u901a\u8fc7\u903b\u8f91\u548c\u8fd0\u7b97\u7b26\u5b9e\u73b0\u7684\u6761\u4ef6\u6e32\u67d3\u3002<\/h1>\n
\u5728JSX\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528&&\u8fd0\u7b97\u7b26\u6765\u5b9e\u73b0\u4ee5\u4e0b\u7c7b\u4f3c\u7684\u5199\u6cd5\u3002<\/p>\n
{<\/span> condition<\/span> &&<\/span> expression<\/span> }<\/span>\r\n<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u8fc7\u53bb\u6211\u4eec\u53ef\u80fd\u4f1a\u7528\u4e09\u5143\u64cd\u4f5c\u7b26\u6765\u5199\u4e0b\u8ff0\u7684\u8868\u8fbe\u5f0f\u3002<\/p>\n
  {<\/span>notifications<\/span>.<\/span>length<\/span> >=<\/span> 0<\/span>\r\n- <\/span>    ?<\/span> <<\/span>span<\/span> class<\/span>=<\/span>\"badge\"<\/span>><\/span>{<\/span>notifications<\/span>.<\/span>length<\/span>}<\/span><\/<\/span>span<\/span>><\/span>\r\n<\/span>- <\/span>    :<\/span> <><\/><\/span>\r\n<\/span>+ <\/span>    &&<\/span> <<\/span>span<\/span> class<\/span>=<\/span>\"badge\"<\/span>><\/span>{<\/span>notifications<\/span>.<\/span>length<\/span>}<\/span><\/<\/span>span<\/span>><\/span>\r\n<\/span>  }<\/span>\r\n<\/code><\/pre>\n
\u5728JSX\u4e2d\uff0c\u5982\u679c\u8868\u8fbe\u5f0f\u8fd4\u56defalse\uff0cReact\u5c06\u4e0d\u4f1a\u6e32\u67d3\u4efb\u4f55\u5185\u5bb9\u3002\u540c\u6837\uff0c\u5982\u679c\u8fd4\u56detrue\u3001null\u6216undefined\uff0c\u4e5f\u4e0d\u4f1a\u6709\u4efb\u4f55\u5185\u5bb9\u88ab\u6e32\u67d3\u3002<\/p>\n
\u542c\u8bf4\u5982\u679c\u4f7f\u7528 TypeScript \u548c eslint\uff0c\u6700\u597d\u542f\u7528 strict-boolean-expressions\u3002<\/p>\n
\u4e8b\u4ef6\u76ee\u6807\u540d\u79f0<\/h1>\n
\u5728React\u4e2d\uff0c\u5f53\u8868\u5355\u7684\u503c\u88ab\u66f4\u65b0\u65f6\uff0c\u53ef\u80fd\u4f1a\u7f16\u5199\u4ee5\u4e0b\u7c7b\u578b\u7684\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u3002\u5728\u4e0b\u9762\u7684\u793a\u4f8b\u4ee3\u7801\u4e2d\uff0c\u6709\u4e00\u4e2a\u7528\u4e8e\u6307\u5b9aname\u548cemail\u7684\u6587\u672c\u6846\uff0c\u5f53\u5b83\u4eec\u7684\u503c\u88ab\u66f4\u65b0\u65f6\uff0c\u5047\u8bbe\u4f1a\u8c03\u7528\u8fd9\u4e9b\u51fd\u6570\u3002<\/p>\n
const<\/span> [<\/span>name<\/span>,<\/span> setName<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>''<\/span>);<\/span>\r\nconst<\/span> [<\/span>email<\/span>,<\/span> setEmail<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>''<\/span>);<\/span>\r\n\r\nfunction<\/span> handleChangeName<\/span>(<\/span>event<\/span>)<\/span> {<\/span>\r\n  setName<\/span>(<\/span>event<\/span>.<\/span>target<\/span>.<\/span>value<\/span>);<\/span>\r\n}<\/span>\r\n\r\nfunction<\/span> handleChangeEmail<\/span>(<\/span>event<\/span>)<\/span> {<\/span>\r\n  setEmail<\/span>(<\/span>event<\/span>.<\/span>target<\/span>.<\/span>value<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e5f\u8bb8\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528event.target.name\u5c06\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u6574\u5408\u5728\u4e00\u8d77\u3002<\/p>\n
const<\/span> [<\/span>formData<\/span>,<\/span> setFormData<\/span>]<\/span> =<\/span> useState<\/span>({<\/span> name<\/span>:<\/span> ''<\/span>,<\/span> email<\/span>:<\/span> ''<\/span> });<\/span>\r\n\r\nfunction<\/span> handleChangeText<\/span>(<\/span>event<\/span>)<\/span> {<\/span>\r\n  const<\/span> newFormData<\/span> =<\/span> {...<\/span>formData<\/span>};<\/span>\r\n  newFormData<\/span>[<\/span>event<\/span>.<\/span>target<\/span>.<\/span>name<\/span>]<\/span> =<\/span> event<\/span>.<\/span>target<\/span>.<\/span>value<\/span>;<\/span>\r\n  setFormData<\/span>(<\/span>newFormData<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6b64\u5916\uff0c\u5728\u5b98\u65b9\u6587\u4ef6\u4e2d\uff0c\u4f7f\u7528\u8ba1\u7b97\u5c5e\u6027\u540d\u79f0\u6765\u7f16\u5199\u3002\u5982\u679c\u4f7f\u7528\u8ba1\u7b97\u5c5e\u6027\u540d\u79f0\u6765\u91cd\u5199\u4e0a\u8ff0\u793a\u4f8b\uff0c\u5c06\u4f1a\u53d8\u6210\u4ee5\u4e0b\u7684\u6837\u5b50\u3002<\/p>\n
function<\/span> handleChangeText<\/span>(<\/span>event<\/span>)<\/span> {<\/span>\r\n  setFormData<\/span>({...<\/span>formData<\/span>,<\/span> [<\/span>event<\/span>.<\/span>target<\/span>.<\/span>name<\/span>]:<\/span> event<\/span>.<\/span>target<\/span>.<\/span>value<\/span>});<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u9009\u62e9\u6807\u7b7e\u548c\u6587\u672c\u533a\u6807\u7b7e\u7684 value \u5c5e\u6027<\/h1>\n
\u5728 select \u6807\u7b7e\u548c textarea \u6807\u7b7e\u4e2d\uff0c\u6dfb\u52a0\u4e86 value \u5c5e\u6027\uff0c\u8fd9\u5728 HTML \u4e2d\u672c\u5e94\u8be5\u4e0d\u5b58\u5728\u3002<\/p>\n
 <\/p>\n
\u6b64\u5916\uff0c\u5bf9\u4e8e input[type=”checkbox”] \u548c input[type=”radio”] \u6807\u7b7e\uff0c\u73b0\u5728\u4e5f\u53ef\u4ee5\u6307\u5b9a checked \u5c5e\u6027\u3002<\/p>\n
 <\/p>\n
\u901a\u8fc7\u8fd9\u6837\u505a\uff0c\u53ef\u4ee5\u6d88\u9664\u5197\u957f\u7684\u4ee3\u7801\uff0c\u5e76\u8f7b\u677e\u7ba1\u7406\u53d7\u63a7\u7ec4\u4ef6\u3002<\/p>\n
<<\/span>select<\/span> value<\/span>=<\/span>{<\/span>selectedItem<\/span>}<\/span>><\/span>\r\n  <<\/span>option<\/span> value<\/span>=<\/span>\"strawberry\"<\/span>><\/span>\u30a4\u30c1\u30b4<\/<\/span>option<\/span>><\/span>\r\n  <<\/span>option<\/span> value<\/span>=<\/span>\"mint\"<\/span>><\/span>\u30df\u30f3\u30c8<\/<\/span>option<\/span>><\/span>\r\n  <<\/span>option<\/span> value<\/span>=<\/span>\"chocolate\"<\/span>><\/span>\u30c1\u30e7\u30b3\u30ec\u30fc\u30c8<\/<\/span>option<\/span>><\/span>\r\n<\/<\/span>select<\/span>><\/span>\r\n<<\/span>textarea<\/span> value<\/span>=<\/span>{<\/span>myVeryLongText<\/span>}<\/span> \/><\/span>\r\n<<\/span>input<\/span> type<\/span>=<\/span>\"checkbox\"<\/span> checked<\/span>=<\/span>{<\/span>isChecked<\/span>}<\/span> \/><\/span>\u30c1\u30a7\u30c3\u30af\u30dc\u30c3\u30af\u30b9<\/span>\r\n<\/code><\/pre>\n
\u7ec4\u4ef6\u7684\u5b50\u5143\u7d20<\/h1>\n
\u5728React\u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u7279\u6b8a\u7684props\u79f0\u4e3achildren\u3002\u88ab\u5305\u542b\u5728\u6807\u7b7e\u4e2d\u7684\u5b50\u5143\u7d20\u53ef\u4ee5\u901a\u8fc7props.children\u6765\u63a5\u6536\uff0c\u5e76\u81ea\u7531\u5730\u653e\u7f6e\u5728\u7ec4\u4ef6\u5185\u3002<\/p>\n
<<\/span>FancyBorderComponent<\/span>><\/span>\r\n  <<\/span>h1<\/span>><\/span>Hello World<\/<\/span>h1<\/span>><\/span>\r\n  Welcome to React!\r\n<\/<\/span>FancyBorderComponent<\/span>><\/span>\r\n<\/code><\/pre>\n
\/\/ \u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u6d3e\u624b\u306a\u30dc\u30fc\u30c0\u30fc\u3092\u8ffd\u52a0\u3059\u308b<\/span>\r\nfunction<\/span> FancyBorderComponent<\/span>(<\/span>props<\/span>)<\/span> {<\/span>\r\n  return <\/span>(<\/span>\r\n    <<\/span>div<\/span> class<\/span>=<\/span>\"fancy-border\"<\/span>><\/span>\r\n      {<\/span>props<\/span>.<\/span>children<\/span>}<\/span>\r\n    <\/<\/span>div<\/span>><\/span>\r\n  );<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u60a8\u6b63\u5728\u4f7f\u7528TypeScript\uff0c\u5efa\u8bae\u5c06props.children\u6307\u5b9a\u4e3aReact.Node\u7c7b\u578b\u3002<\/p>\n
\u5982\u679c\u7701\u7565\u6837\u5f0f\u5355\u4f4d\uff0c\u9ed8\u8ba4\u4e3a px\u3002<\/h1>\n
\u5728CSS\u4e2d\uff0c\u65e0\u6cd5\u7701\u7565\u9664\u4e860\u4ee5\u5916\u7684\u6570\u5b57\u5355\u4f4d\uff0c\u4f46\u5728React\u4e2d\u53ef\u4ee5\u7701\u7565\u3002<\/p>\n
\u53e6\u5916\uff0c\u6839\u636eCSS\u5c5e\u6027\u7684\u4e0d\u540c\uff0c\u6709\u4e9b\u60c5\u51b5\u4e0b\u4f1a\u81ea\u52a8\u6dfb\u52a0\u5355\u4f4d\uff0c\u800c\u6709\u4e9b\u60c5\u51b5\u4e0b\u5219\u4e0d\u4f1a\u3002\u5982\u679c\u6307\u5b9a\u4e3a\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u786e\u4fdd\u4e0d\u4f1a\u52a0\u4e0a\u5355\u4f4d\uff0c\u56e0\u6b64\u5982\u679c\u4e0d\u60f3\u52a0\u5355\u4f4d\uff0c\u6211\u8ba4\u4e3a\u8fd9\u662f\u6700\u53ef\u9760\u7684\u9009\u62e9\u3002<\/p>\n
\u60a8\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u6216\u6570\u5b57\u4f5c\u4e3a\u503c\u4f20\u9012\u3002\u5982\u679c\u60a8\u4f20\u9012\u4e00\u4e2a\u6570\u5b57\uff0c\u6bd4\u5982\u5bbd\u5ea6: 100\uff0cReact\u5c06\u81ea\u52a8\u5c06px\uff08\u201c\u50cf\u7d20\u201d\uff09\u9644\u52a0\u5230\u8be5\u503c\u4e0a\uff0c\u9664\u975e\u5b83\u662f\u4e00\u4e2a\u65e0\u5355\u4f4d\u7684\u5c5e\u6027\u3002<\/p><\/blockquote>\n
 <\/p>\n
<<\/span>div<\/span> style<\/span>=<\/span>{<\/span>{<\/span> height<\/span>:<\/span> 150<\/span>,<\/span> padding<\/span>:<\/span> 50<\/span>,<\/span> opacity<\/span>:<\/span> 0.5<\/span>,<\/span> backgroundColor<\/span>:<\/span> '<\/span>red<\/span>'<\/span> }<\/span>}<\/span>><\/span>\r\n  Hello World!\r\n<\/<\/span>div<\/span>><\/span>\r\n<<\/span>div<\/span> className<\/span>=<\/span>\"hello-world\"<\/span>><\/span>\r\n  Hello World!\r\n<\/<\/span>div<\/span>><\/span>\r\n<\/code><\/pre>\n
.hello-world<\/span> {<\/span>\r\n  height<\/span>:<\/span> 150px<\/span>;<\/span>\r\n  padding<\/span>:<\/span> 50px<\/span>;<\/span>\r\n  opacity<\/span>:<\/span> 0.5<\/span>;<\/span>\r\n  background-color<\/span>:<\/span> blue<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\"image.png\"<\/div>\n
\u5728\u81ea\u5b9a\u4e49\u5c5e\u6027\u4e2d\uff0c\u6709\u4e9b\u4eba\u8bf4\u5355\u4f4d\u4f1a\u81ea\u52a8\u6dfb\u52a0\uff0c\u4f46\u5728\u6211\u7684\u73af\u5883\u4e2d\u65e0\u6cd5\u590d\u73b0\u3002<\/p>\n
\u81ea\u5b9a\u4e49\u6302\u94a9<\/h1>\n
\u53ef\u4ee5\u5c06\u4f7f\u7528useState\u3001useEffect\u7b49hooks\u7684\u64cd\u4f5c\u5171\u4eab\u5230\u53e6\u4e00\u4e2a\u51fd\u6570\u4e2d\u3002\u8fd9\u88ab\u79f0\u4e3a\u81ea\u5b9a\u4e49hook\uff0c\u4f46\u5728\u5185\u90e8\u5b9e\u9645\u4e0a\u53ea\u662f\u4e00\u4e2a\u666e\u901a\u7684\u51fd\u6570\u3002<\/p>\n
function<\/span> useCount<\/span>()<\/span> {<\/span>\r\n  const<\/span> [<\/span>count<\/span>,<\/span> setCount<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>0<\/span>);<\/span>\r\n\r\n  const<\/span> countUp<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n    setCount<\/span>(<\/span>count<\/span> +<\/span> 1<\/span>);<\/span>\r\n  }<\/span>\r\n\r\n  const<\/span> countMessage<\/span> =<\/span> `\u73fe\u5728\u306e\u30ab\u30a6\u30f3\u30c8\u306f <\/span>${<\/span>count<\/span>}<\/span> \u3067\u3059\u3002`<\/span>\r\n\r\n  return<\/span> [<\/span>countMessage<\/span>,<\/span> countUp<\/span>];<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u4e9b\u4e0e\u5176\u4ed6\u94a9\u5b50\u4e00\u6837\uff0c\u53ef\u4ee5\u4ece\u51fd\u6570\u7ec4\u4ef6\u4e2d\u8c03\u7528\u3002<\/p>\n
function<\/span> MyComponent<\/span>()<\/span> {<\/span>\r\n  const<\/span> [<\/span>countMessage<\/span>,<\/span> countUp<\/span>]<\/span> =<\/span> useCount<\/span>();<\/span>\r\n\r\n  return <\/span>(<\/span>\r\n    <><\/span>\r\n      {<\/span> countMessage<\/span> }<\/span>\r\n      <<\/span>button<\/span> onClick<\/span>=<\/span>{<\/span>countUp<\/span>}<\/span>><\/span>\u30ab\u30a6\u30f3\u30c8<\/<\/span>button<\/span>><\/span>\r\n    <\/><\/span>\r\n  );<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6216\u8bb8\u521a\u5f00\u59cb\u63a5\u89e6React\u65f6\u53ef\u80fd\u89c9\u5f97\u5e76\u6ca1\u6709\u4ec0\u4e48\u5fc5\u8981\u6027\uff0c\u4f46\u5f53\u6709\u4e00\u5929\u771f\u6b63\u9700\u8981\u7684\u65f6\u5019\uff0c\u8bf7\u8bd5\u7740\u56de\u60f3\u4e00\u4e0b\u8fd9\u53e5\u8bdd\u3002<\/p>\n
\u53ef\u4ee5\u5c06\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9 useState \u7684 setFoo()\u3002<\/h1>\n
const<\/span> [<\/span>count<\/span>,<\/span> setCount<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>0<\/span>);<\/span>\r\n\r\nvar<\/span> handleClick<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  setCount<\/span>((<\/span>c<\/span>)<\/span> =><\/span> c<\/span> +<\/span> 1<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4f3c\u4e4e\u53ef\u4ee5\u4f20\u9012\u4e00\u4e2a\u51fd\u6570\u4f5c\u4e3asetFoo()\u7684\u53c2\u6570\uff0c\u8be5\u51fd\u6570\u63a5\u6536\u65e7\u72b6\u6001\u5e76\u8fd4\u56de\u65b0\u72b6\u6001\uff0c\u800c\u4e0d\u662f\u4f20\u9012\u65b0\u72b6\u6001\u4f5c\u4e3a\u53c2\u6570\u3002\u7531\u4e8e\u53ef\u4ee5\u4f7f\u7528\u6700\u65b0\u7684\u72b6\u6001\uff0c\u56e0\u6b64\u53ef\u4ee5\u8fde\u7eed\u8c03\u7528setFoo()\u3002<\/p>\n
var<\/span> handleClick<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  setCount<\/span>((<\/span>c<\/span>)<\/span> =><\/span> c<\/span> +<\/span> 1<\/span>);<\/span>\r\n  setCount<\/span>((<\/span>c<\/span>)<\/span> =><\/span> c<\/span> +<\/span> 1<\/span>);<\/span> \/\/ count \u306e\u5024\u304c 2 \u5897\u52a0\u3059\u308b<\/span>\r\n}<\/span>\r\n\r\nvar<\/span> handleClickAlt<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  setCount<\/span>(<\/span>count<\/span> +<\/span> 1<\/span>);<\/span>\r\n  setCount<\/span>(<\/span>count<\/span> +<\/span> 1<\/span>);<\/span> \/\/ count \u306e\u5024\u306f 1 \u3057\u304b\u5897\u52a0\u3057\u306a\u3044<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u53ea\u662f\uff0c\u6211\u89c9\u5f97\u53ef\u80fd\u6ca1\u6709\u592a\u591a\u5fc5\u987b\u4f7f\u7528\u5b83\u7684\u573a\u5408\u3002<\/p>\n
\u4e0a\u4e0b\u6587<\/h1>\n
\u4f60\u53ef\u4ee5\u5728\u6574\u4e2aReact\u5e94\u7528\u7a0b\u5e8f\u4e2d\u521b\u5efa\u5168\u5c40\u53d8\u91cf\uff0c\u4f8b\u5982\u8bed\u8a00\u73af\u5883\u8bbe\u7f6e\u548cUI\u4e3b\u9898\u8bbe\u7f6e\u7b49\u3002\u8bf7\u67e5\u770b\u94fe\u63a5\u4ee5\u83b7\u53d6\u66f4\u591a\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n
 <\/p>\n
\u95e8\u6237<\/h1>\n
\u4f7f\u7528\u95e8\u6237\u53ef\u4ee5\u5728DOM\u4e2d\u7684\u4e0d\u540c\u4f4d\u7f6e\u6e32\u67d3\u5b50\u7ec4\u4ef6\u3002\u4f8b\u5982\uff0c\u5f53\u5728\u6307\u5b9a\u4e86overflow: hidden\u7684\u7ec4\u4ef6\u5185\u60f3\u8981\u663e\u793a\u6a21\u6001\u5bf9\u8bdd\u6846\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u95e8\u6237\u3002<\/p>\n
 <\/p>\n
\u603b\u7ed3<\/h1>\n
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 <\/p>\n
\u5982\u679c\u6709\u4efb\u4f55\u9519\u8bef\u6216\u7591\u95ee\uff0c\u8bf7\u7559\u4e0b\u8bc4\u8bba\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6700\u8fd1\u6211\u9605\u8bfb\u4e86React\u5b98\u65b9\u6587\u6863\uff0c\u53d1\u73b0\u4e86\u5f88\u591a\u65b0\u9896\u7684\u60f3\u6cd5\u3002\u6211\u8ba4\u4e3a\u5728\u81ea\u5b66React\u7684\u8fc7\u7a0b\u4e2d\uff0c\u53ef\u80fd\u4f1a\u5ffd\u7565\u8bb8\u591a\u7c7b\u4f3c\u7684\u6280\u5de7 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-38505","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u6211\u60f3\u8bfbReact\u7684\u5b98\u65b9\u6587\u6863\uff0c\u4ee5\u63d0\u5347\u6211\u7684\u6c34\u5e73\uff01 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u60f3\u8bfbreact\u7684\u5b98\u65b9\u6587\u6863\uff0c\u4ee5\u63d0\u5347\u6211\u7684\u6c34\u5e73\uff01\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6211\u60f3\u8bfbReact\u7684\u5b98\u65b9\u6587\u6863\uff0c\u4ee5\u63d0\u5347\u6211\u7684\u6c34\u5e73\uff01\" \/>\n<meta property=\"og:description\" content=\"\u6700\u8fd1\u6211\u9605\u8bfb\u4e86React\u5b98\u65b9\u6587\u6863\uff0c\u53d1\u73b0\u4e86\u5f88\u591a\u65b0\u9896\u7684\u60f3\u6cd5\u3002\u6211\u8ba4\u4e3a\u5728\u81ea\u5b66React\u7684\u8fc7\u7a0b\u4e2d\uff0c\u53ef\u80fd\u4f1a\u5ffd\u7565\u8bb8\u591a\u7c7b\u4f3c\u7684\u6280\u5de7 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u60f3\u8bfbreact\u7684\u5b98\u65b9\u6587\u6863\uff0c\u4ee5\u63d0\u5347\u6211\u7684\u6c34\u5e73\uff01\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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