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6ce5b1ae.25afa439.js
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(window.webpackJsonp=window.webpackJsonp||[]).push([[31],{168:function(e,n,t){"use strict";t.r(n),t.d(n,"frontMatter",(function(){return b})),t.d(n,"metadata",(function(){return c})),t.d(n,"rightToc",(function(){return i})),t.d(n,"default",(function(){return p}));var a=t(2),r=t(9),o=(t(0),t(199)),b={title:"React \u98ce\u683c\u6307\u5357"},c={id:"react/code",title:"React \u98ce\u683c\u6307\u5357",description:"> \u8fd9\u4e2a\u6307\u5357\u5927\u90e8\u5206\u57fa\u4e8e\u73b0\u5728\u5728JavaScript\u4e2d\u6d41\u884c\u7684\u6807\u51c6\uff0c\u5c3d\u7ba1\u6709\u4e9b\u7ea6\u5b9a(\u5982\uff1a async/await \u6216 class \u7684 static \u5b57\u6bb5)\u6839\u636e\u5177\u4f53\u60c5\u51b5\u4e5f\u4f1a\u88ab\u5f15\u5165\u6216\u8005\u88ab\u7981\u6b62\u3002\u5f53\u524d\u8fd9\u4e2a\u6307\u5357\u4e0d\u5305\u62ec\u4e5f\u4e0d\u63a8\u8350\u4efb\u4f55 ECMAScript stage-3(\u7b2c\u4e09\u9636\u6bb5\u63d0\u6848) 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",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/prefer-stateless-function.md"}),Object(o.b)("inlineCode",{parentName:"a"},"react/prefer-stateless-function"))),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\nconst Listing = React.createClass({\n // ...\n render() {\n return <div>{this.state.hello}</div>;\n }\n});\n\n// good\nclass Listing extends React.Component {\n // ...\n render() {\n return <div>{this.state.hello}</div>;\n }\n}\n")),Object(o.b)("p",{parentName:"li"},"\u5982\u679c\u4f60\u6ca1\u6709\u4f7f\u7528 state\u3001 refs \uff0c\u6700\u597d\u7528\u6b63\u5e38\u51fd\u6570(\u4e0d\u662f\u7bad\u5934\u51fd\u6570)\u800c\u4e0d\u662f class\uff1a"),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\nclass Listing extends React.Component {\n render() {\n return 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\u7528\u5927\u9a7c\u5cf0\u4f5c\u4e3a\u6587\u4ef6\u540d\uff0c\u5982\uff1a",Object(o.b)("inlineCode",{parentName:"p"},"ReservationCard.tsx"),"\u3002")),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},Object(o.b)("strong",{parentName:"p"},"\u53c2\u6570\u547d\u540d"),": React \u7ec4\u4ef6\u7528\u5927\u9a7c\u5cf0\uff0c\u7ec4\u4ef6\u7684\u5b9e\u4f8b\u7528\u5c0f\u9a7c\u5cf0\u3002 eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-pascal-case.md"}),Object(o.b)("inlineCode",{parentName:"a"},"react/jsx-pascal-case"))),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\nimport reservationCard from './ReservationCard';\n\n// good\nimport ReservationCard from './ReservationCard';\n\n// bad\nconst ReservationItem = <ReservationCard />;\n\n// good\nconst reservationItem = <ReservationCard />;\n"))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},Object(o.b)("strong",{parentName:"p"},"\u7ec4\u4ef6\u547d\u540d"),": \u6587\u4ef6\u540d\u4f5c\u4e3a\u7ec4\u4ef6\u540d\u3002\u4f8b\u5982\uff1a",Object(o.b)("inlineCode",{parentName:"p"},"ReservationCard.jsx")," \u5e94\u8be5\u7528 ",Object(o.b)("inlineCode",{parentName:"p"},"ReservationCard")," \u4f5c\u4e3a\u53c2\u6570\u540d\u3002 \u7136\u800c\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u6587\u4ef6\u5939\u91cc\u7684\u8ddf\u7ec4\u4ef6\uff0c\u5e94\u8be5\u7528 ",Object(o.b)("inlineCode",{parentName:"p"},"index.jsx")," \u4f5c\u4e3a\u6587\u4ef6\u540d\uff0c\u540c\u65f6\u7528\u6587\u4ef6\u5939\u540d\u4f5c\u4e3a\u7ec4\u4ef6\u540d"),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\nimport Footer from './Footer/Footer';\n\n// bad\nimport Footer from './Footer/index';\n\n// good\nimport Footer from './Footer';\n"))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},Object(o.b)("strong",{parentName:"p"},"\u9ad8\u9636\u7ec4\u4ef6",Object(o.b)("inlineCode",{parentName:"strong"},"HOC"),"\u547d\u540d"),": \u7528\u9ad8\u9636\u7ec4\u4ef6\u540d\u548c\u4f20\u5165\u7684\u7ec4\u4ef6\u540d\u7ec4\u5408\u4f5c\u4e3a\u751f\u6210\u7684\u7ec4\u4ef6\u7684 ",Object(o.b)("inlineCode",{parentName:"p"},"displayName"),"\u3002 \u4e3e\u4e2a\u4f8b\u5b50\uff0c\u4e00\u4e2a\u9ad8\u9636\u7ec4\u4ef6 ",Object(o.b)("inlineCode",{parentName:"p"},"withFoo()"),"\uff0c \u5f53\u4f20\u5165\u4e00\u4e2a\u7ec4\u4ef6 ",Object(o.b)("inlineCode",{parentName:"p"},"Bar")," \u5e94\u8be5\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u7ec4\u4ef6\uff0c\u4ed6\u7684 ",Object(o.b)("inlineCode",{parentName:"p"},"displayName")," \u5c5e\u6027\u662f ",Object(o.b)("inlineCode",{parentName:"p"},"withFoo(Bar)"),"\u3002"),Object(o.b)("blockquote",{parentName:"li"},Object(o.b)("p",{parentName:"blockquote"},"Why? \u7ec4\u4ef6\u7684 ",Object(o.b)("inlineCode",{parentName:"p"},"displayName")," \u53ef\u4ee5\u7528\u4e8e\u5f00\u53d1\u8005\u5de5\u5177\u6216\u8005\u9519\u8bef\u4fe1\u606f\u4e2d\uff0c\u540c\u65f6\u8fd8\u6709\u4e00\u4e2a\u503c\u53ef\u4ee5\u6e05\u6670\u7684\u8868\u8fbe\u8fd9\u79cd\u7ec4\u4ef6\u5173\u7cfb\uff0c\u8fd9\u53ef\u4ee5\u5e2e\u52a9\u4eba\u4eec\u7406\u89e3\u5230\u5e95\u53d1\u751f\u4e86\u4ec0\u4e48")),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\nexport default function withFoo(WrappedComponent) {\n return function WithFoo(props) {\n return <WrappedComponent {...props} foo />;\n }\n}\n\n// good\nexport default function withFoo(WrappedComponent) {\n function WithFoo(props) {\n return <WrappedComponent {...props} foo />;\n }\n\n const wrappedComponentName = WrappedComponent.displayName\n || WrappedComponent.name\n || 'Component';\n\n WithFoo.displayName = `withFoo(${wrappedComponentName})`;\n return WithFoo;\n}\n"))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},Object(o.b)("strong",{parentName:"p"},"Props \u547d\u540d"),": \u907f\u514d\u7528 DOM \u7ec4\u4ef6\u7684\u5c5e\u6027\u540d\u8868\u8fbe\u4e0d\u540c\u7684\u610f\u4e49"),Object(o.b)("blockquote",{parentName:"li"},Object(o.b)("p",{parentName:"blockquote"},"Why? \u4eba\u4eec\u671f\u671b ",Object(o.b)("inlineCode",{parentName:"p"},"style"),"\u3001 ",Object(o.b)("inlineCode",{parentName:"p"},"className")," \u8fd9\u79cd\u5c5e\u6027\u4ee3\u8868\u4e00\u4e2a\u660e\u786e\u7684\u610f\u4e49\u3002 \u4e3a\u5e94\u7528\u7a0b\u5e8f\u7684\u4e00\u4e2a\u5b50\u96c6\u6539\u53d8\u6b64API\u4f1a\u4f7f\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u964d\u4f4e\uff0c\u7ef4\u62a4\u6027\u964d\u4f4e\uff0c\u5e76\u53ef\u80fd\u5bfc\u81f4\u9519\u8bef\u3002")),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),'// bad\n<MyComponent style="fancy" />\n\n// bad\n<MyComponent className="fancy" />\n\n// good\n<MyComponent variant="fancy" />\n')))),Object(o.b)("h2",{id:"\u58f0\u660e"},"\u58f0\u660e"),Object(o.b)("ul",null,Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u4e0d\u8981\u901a\u8fc7 ",Object(o.b)("inlineCode",{parentName:"p"},"displayName")," \u547d\u540d\u7ec4\u4ef6\u3002\u6700\u597d\u901a\u8fc7\u5f15\u7528\u547d\u540d\u7ec4\u4ef6\u3002"),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\nexport default React.createClass({\n displayName: 'ReservationCard',\n // stuff goes here\n});\n\n// good\nexport default class ReservationCard extends React.Component {\n}\n")))),Object(o.b)("h2",{id:"\u5bf9\u9f50"},"\u5bf9\u9f50"),Object(o.b)("ul",null,Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u5bf9 JSX \u8bed\u6cd5\u4f7f\u7528\u8fd9\u4e9b\u5bf9\u9f50\u98ce\u683c\u3002 eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-closing-bracket-location.md"}),Object(o.b)("inlineCode",{parentName:"a"},"react/jsx-closing-bracket-location"))," ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-closing-tag-location.md"}),Object(o.b)("inlineCode",{parentName:"a"},"react/jsx-closing-tag-location"))),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),'// bad\n<Foo superLongParam="bar"\n anotherSuperLongParam="baz" />\n\n// good\n<Foo\n superLongParam="bar"\n anotherSuperLongParam="baz"\n/>\n\n// \u5982\u679c\u80fd\u653e\u5728\u4e00\u884c\uff0c\u4e5f\u53ef\u4ee5\u7528\u5355\u884c\u8868\u793a\n<Foo bar="bar" />\n\n// Foo \u91cc\u9762\u7684\u6807\u7b7e\u6b63\u5e38\u7f29\u8fdb\n<Foo\n superLongParam="bar"\n anotherSuperLongParam="baz"\n>\n <Quux />\n</Foo>\n\n// bad\n{showButton &&\n <Button />\n}\n\n// bad\n{\n showButton &&\n <Button />\n}\n\n// good\n{showButton && (\n <Button />\n)}\n\n// good\n{showButton && <Button />}\n')))),Object(o.b)("h2",{id:"\u5f15\u7528"},"\u5f15\u7528"),Object(o.b)("ul",null,Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u5728 JSX \u5c5e\u6027\u4e2d\u7528\u53cc\u5f15\u53f7(",Object(o.b)("inlineCode",{parentName:"p"},'"'),")\uff0c\u4f46\u662f\u5728js\u91cc\u7528\u5355\u5f15\u53f7(",Object(o.b)("inlineCode",{parentName:"p"},"'"),")\u3002eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://eslint.org/docs/rules/jsx-quotes"}),Object(o.b)("inlineCode",{parentName:"a"},"jsx-quotes"))),Object(o.b)("blockquote",{parentName:"li"},Object(o.b)("p",{parentName:"blockquote"},"Why? \u6b63\u5e38\u7684 HTML \u5c5e\u6027\u4e5f\u901a\u5e38\u4f7f\u7528\u53cc\u5f15\u53f7\u800c\u4e0d\u662f\u5355\u5f15\u53f7\uff0c\u6240\u4ee5 JSX \u5c5e\u6027\u4e5f\u4f7f\u7528\u8fd9\u4e2a\u7ea6\u5b9a\u3002")),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\n<Foo bar='bar' />\n\n// good\n<Foo bar=\"bar\" />\n\n// bad\n<Foo style={{ left: \"20px\" }} />\n\n// good\n<Foo style={{ left: '20px' }} />\n")))),Object(o.b)("h2",{id:"\u95f4\u8ddd"},"\u95f4\u8ddd"),Object(o.b)("ul",null,Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u5728\u81ea\u95ed\u548c\u6807\u7b7e\u5185\u7a7a\u4e00\u683c\u3002 eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://eslint.org/docs/rules/no-multi-spaces"}),Object(o.b)("inlineCode",{parentName:"a"},"no-multi-spaces")),", ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-tag-spacing.md"}),Object(o.b)("inlineCode",{parentName:"a"},"react/jsx-tag-spacing"))),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\n<Foo/>\n\n// very bad\n<Foo />\n\n// bad\n<Foo\n />\n\n// good\n<Foo />\n"))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"JSX \u91cc\u7684\u5927\u62ec\u53f7\u4e0d\u8981\u7a7a\u683c\u3002 eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-curly-spacing.md"}),Object(o.b)("inlineCode",{parentName:"a"},"react/jsx-curly-spacing"))),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\n<Foo bar={ baz } />\n\n// good\n<Foo bar={baz} />\n")))),Object(o.b)("h2",{id:"\u5c5e\u6027"},"\u5c5e\u6027"),Object(o.b)("ul",null,Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"props \u7528\u5c0f\u9a7c\u5cf0"),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),'// bad\n<Foo\n UserName="hello"\n phone_number={12345678}\n/>\n\n// good\n<Foo\n userName="hello"\n phoneNumber={12345678}\n/>\n'))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u5982\u679c prop \u7684\u503c\u662f true \u53ef\u4ee5\u5ffd\u7565\u8fd9\u4e2a\u503c\uff0c\u76f4\u63a5\u5199 prop \u540d\u5c31\u53ef\u4ee5\u3002 eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-boolean-value.md"}),Object(o.b)("inlineCode",{parentName:"a"},"react/jsx-boolean-value"))),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\n<Foo\n hidden={true}\n/>\n\n// good\n<Foo\n hidden\n/>\n\n// good\n<Foo hidden />\n"))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},Object(o.b)("inlineCode",{parentName:"p"},"<img>")," \u6807\u7b7e\u901a\u5e38\u4f1a\u8bbe\u7f6e ",Object(o.b)("inlineCode",{parentName:"p"},"alt")," \u5c5e\u6027\u3002\u5982\u679c\u56fe\u7247\u662f\u8868\u73b0\u578b\u7684\uff0c ",Object(o.b)("inlineCode",{parentName:"p"},"alt"),"\u53ef\u4ee5\u662f\u7a7a\u5b57\u7b26\u4e32\u6216\u8005 ",Object(o.b)("inlineCode",{parentName:"p"},"<img>")," \u5fc5\u987b\u6709 ",Object(o.b)("inlineCode",{parentName:"p"},'role="presentation"')," \u8fd9\u4e2a\u5c5e\u6027\u3002 eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/alt-text.md"}),Object(o.b)("inlineCode",{parentName:"a"},"jsx-a11y/alt-text"))),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),'// bad\n<img src="hello.jpg" />\n\n// good\n<img src="hello.jpg" alt="Me waving hello" />\n\n// good\n<img src="hello.jpg" alt="" />\n\n// good\n<img src="hello.jpg" role="presentation" />\n'))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u4e0d\u8981\u5728 ",Object(o.b)("inlineCode",{parentName:"p"},"<img>")," \u7684 ",Object(o.b)("inlineCode",{parentName:"p"},"alt"),' \u5c5e\u6027\u91cc\u7528\u7c7b\u4f3c "image"\uff0c "photo"\uff0c "picture" \u8fd9\u4e9b\u5355\u8bcd\u3002 eslint: ',Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/img-redundant-alt.md"}),Object(o.b)("inlineCode",{parentName:"a"},"jsx-a11y/img-redundant-alt"))),Object(o.b)("blockquote",{parentName:"li"},Object(o.b)("p",{parentName:"blockquote"},"Why? \u56e0\u4e3a\u5c4f\u5e55\u9605\u8bfb\u5668\u5df2\u7ecf\u5c06 ",Object(o.b)("inlineCode",{parentName:"p"},"img")," \u53d1\u97f3\u4e3a\u56fe\u7247\u4e86\uff0c\u6240\u4ee5\u8fd9\u4e2a\u4fe1\u606f\u5c31\u4e0d\u9700\u8981\u51fa\u73b0\u5728 alt \u6587\u672c\u91cc\u4e86\u3002")),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),'// bad\n<img src="hello.jpg" alt="Picture of me waving hello" />\n\n// good\n<img src="hello.jpg" alt="Me waving hello" />\n'))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u53ea\u7528\u53ef\u7528\u7684\uff0c\u4e0d\u62bd\u8c61\u7684 ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://www.w3.org/TR/wai-aria/#usage_intro"}),"ARIA roles"),". eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/aria-role.md"}),Object(o.b)("inlineCode",{parentName:"a"},"jsx-a11y/aria-role"))),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),'// bad - \u4e0d\u662f\u4e00\u4e2a ARIA role\n<div role="datepicker" />\n\n// bad - \u62bd\u8c61\u7684 ARIA role\n<div role="range" />\n\n// good\n<div role="button" />\n'))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u4e0d\u8981\u5728\u5143\u7d20\u4e0a\u7528 ",Object(o.b)("inlineCode",{parentName:"p"},"accessKey"),"\u3002 eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/no-access-key.md"}),Object(o.b)("inlineCode",{parentName:"a"},"jsx-a11y/no-access-key"))),Object(o.b)("blockquote",{parentName:"li"},Object(o.b)("p",{parentName:"blockquote"},"Why? \u4f7f\u7528\u5c4f\u5e55\u9605\u8bfb\u5668\u548c\u952e\u76d8\u7684\u4eba\u4f7f\u7528\u7684\u952e\u76d8\u5feb\u6377\u952e\u548c\u952e\u76d8\u547d\u4ee4\u4e4b\u95f4\u7684\u4e0d\u4e00\u81f4\u4f7f\u5f97\u53ef\u8bbf\u95ee\u6027\u53d8\u5f97\u590d\u6742\u3002")),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),'// bad\n<div accessKey="h" />\n\n// good\n<div />\n'))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u907f\u514d\u7528\u6570\u7ec4\u4e0b\u6807\u4f5c\u4e3a ",Object(o.b)("inlineCode",{parentName:"p"},"key")," \u5c5e\u6027\uff0c\u63a8\u8350\u7528\u7a33\u5b9a\u7684 ID"),Object(o.b)("blockquote",{parentName:"li"},Object(o.b)("p",{parentName:"blockquote"},"Why? \u4e0d\u4f7f\u7528\u7a33\u5b9a\u6746\u7684 ID ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://medium.com/@robinpokorny/index-as-a-key-is-an-anti-pattern-e0349aece318"}),"is an anti-pattern")," \u4f1a\u5bf9\u7ec4\u4ef6\u6027\u80fd\u4ea7\u751f\u6d88\u6781\u5f71\u54cd\uff0c\u5e76\u4e14\u7ec4\u4ef6\u72b6\u6001\u5bb9\u6613\u51fa\u73b0\u95ee\u9898\u3002 \u5982\u679c\u6570\u7ec4\u5143\u7d20\u53ef\u80fd\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u6211\u4eec\u4e0d\u63a8\u8350\u4f7f\u7528\u4e0b\u6807\u4f5c\u4e3akey\u3002")),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\n{todos.map((todo, index) =>\n <Todo\n {...todo}\n key={index}\n />\n)}\n\n// good\n{todos.map(todo => (\n <Todo\n {...todo}\n key={todo.id}\n />\n))}\n"))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u5bf9\u4e8e\u6240\u6709\u975e\u5fc5\u987b\u5c5e\u6027\uff0c\u5b9a\u4e49\u4e00\u4e2a\u660e\u786e\u7684\u9ed8\u8ba4\u503c\u3002"),Object(o.b)("blockquote",{parentName:"li"},Object(o.b)("p",{parentName:"blockquote"},"Why? propTypes \u662f\u4e00\u4e2a\u6587\u6863\u5f62\u5f0f\uff0c\u540c\u65f6\u63d0\u4f9b\u9ed8\u8ba4\u5c5e\u6027\u610f\u5473\u7740\u4f7f\u7528\u8005\u4e0d\u9700\u8981\u5047\u5b9a\u90a3\u4e48\u591a\u503c\u3002\u53e6\u5916\uff0c\u8fd9\u4e5f\u610f\u5473\u7740\u4f60\u7684\u4ee3\u7801\u53ef\u4ee5\u5ffd\u7565\u7c7b\u578b\u68c0\u67e5\u3002")),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\nfunction SFC({ foo, bar, children }) {\n return <div>{foo}{bar}{children}</div>;\n}\nSFC.propTypes = {\n foo: PropTypes.number.isRequired,\n bar: PropTypes.string,\n children: PropTypes.node,\n};\n\n// good\nfunction SFC({ foo, bar, children }) {\n return <div>{foo}{bar}{children}</div>;\n}\nSFC.propTypes = {\n foo: PropTypes.number.isRequired,\n bar: PropTypes.string,\n children: PropTypes.node,\n};\nSFC.defaultProps = {\n bar: '',\n children: null,\n};\n"))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u5c11\u7528props\u6269\u5c55\u8fd0\u7b97\u7b26\uff0c\u65e2 ",Object(o.b)("inlineCode",{parentName:"p"},"{...props}")),Object(o.b)("blockquote",{parentName:"li"},Object(o.b)("p",{parentName:"blockquote"},"Why? \u9664\u975e\u4f60\u66f4\u559c\u6b22\u628a\u4e0d\u9700\u8981\u7684props\u5c5e\u6027\u4f20\u5165\u7ec4\u4ef6\u3002\u800c\u4e14\u5bf9\u4e8e v15.6.1 \u53ca\u66f4\u65e9\u4ee5\u524d\u7684 React\uff0c \u4f60\u53ea\u80fd",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://reactjs.org/blog/2017/09/08/dom-attributes-in-react-16.html"}),"\u7ed9DOM\u5143\u7d20\u4f20\u975eHTML\u5c5e\u6027\u7684props"),"\u3002")),Object(o.b)("p",{parentName:"li"},"\u4f8b\u5916\uff1a")),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"HOC \u662f\u4ee3\u7406 props \u5e76\u4e14\u63d0\u6210\u4e86propTypes"),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"function HOC(WrappedComponent) {\n return class Proxy extends React.Component {\n Proxy.propTypes = {\n text: PropTypes.string,\n isLoading: PropTypes.bool\n };\n\n render() {\n return <WrappedComponent {...this.props} />\n }\n }\n}\n"))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u6269\u5c55\u4e00\u4e2a\u5df2\u77e5\u7684\uff0c\u6709\u660e\u786e\u5c5e\u6027\u7684\u5bf9\u8c61\u4e5f\u662f\u53ef\u4ee5\u7684\u3002\u8fd9\u4e2a\u5bf9\u7528 Mocha \u7684 beforeEach \u51fd\u6570\u505a\u5355\u6d4b\u65f6\u5c24\u5176\u6709\u7528\u3002"),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"export default function Foo {\n const props = {\n text: '',\n isPublished: false\n }\n\n return (<div {...props} />);\n}\n")),Object(o.b)("p",{parentName:"li"},"\u4f7f\u7528\u8bf4\u660e\uff1a\n\u5c3d\u53ef\u80fd\u8fc7\u6ee4\u51fa\u4e0d\u9700\u8981\u7684\u5c5e\u6027\u3002\u540c\u65f6\u7528",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://www.npmjs.com/package/prop-types-exact"}),"prop-type-exact"),"\u53bb\u5e2e\u52a9\u907f\u514dbug\u3002"),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\nrender() {\n const { irrelevantProp, ...relevantProps } = this.props;\n return <WrappedComponent {...this.props} />\n}\n\n// good\nrender() {\n const { irrelevantProp, ...relevantProps } = this.props;\n return <WrappedComponent {...relevantProps} />\n}\n")))),Object(o.b)("h2",{id:"refs"},"Refs"),Object(o.b)("ul",null,Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u63a8\u8350\u7528 ref callback \u51fd\u6570\u3002 eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-string-refs.md"}),Object(o.b)("inlineCode",{parentName:"a"},"react/no-string-refs"))),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),'// bad\n<Foo\n ref="myRef"\n/>\n\n// good\n<Foo\n ref={(ref) => { this.myRef = ref; }}\n/>\n')))),Object(o.b)("h2",{id:"\u5706\u62ec\u53f7"},"\u5706\u62ec\u53f7"),Object(o.b)("ul",null,Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u5f53 JSX \u6807\u7b7e\u6709\u591a\u884c\u65f6\uff0c\u7528\u5706\u62ec\u53f7\u5305\u8d77\u6765\u3002eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-wrap-multilines.md"}),Object(o.b)("inlineCode",{parentName:"a"},"react/jsx-wrap-multilines"))),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),'// bad\nrender() {\n return <MyComponent variant="long body" foo="bar">\n <MyChild />\n </MyComponent>;\n}\n\n// good\nrender() {\n return (\n <MyComponent variant="long body" foo="bar">\n <MyChild />\n </MyComponent>\n );\n}\n\n// good, \u5355\u884c\u53ef\u4ee5\u76f4\u63a5\u5199\nrender() {\n const body = <div>hello</div>;\n return <MyComponent>{body}</MyComponent>;\n}\n')))),Object(o.b)("h2",{id:"\u6807\u7b7e"},"\u6807\u7b7e"),Object(o.b)("ul",null,Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u5f53\u6ca1\u6709\u5b50\u5143\u7d20\u65f6\uff0c\u6700\u597d\u7528\u81ea\u95ed\u5408\u6807\u7b7e\u3002 eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/self-closing-comp.md"}),Object(o.b)("inlineCode",{parentName:"a"},"react/self-closing-comp"))),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),'// bad\n<Foo variant="stuff"></Foo>\n\n// good\n<Foo variant="stuff" />\n'))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u5982\u679c\u4f60\u7684\u7ec4\u4ef6\u6709\u591a\u884c\u5c5e\u6027\uff0c\u7528\u4ed6\u7684\u95ed\u5408\u6807\u7b7e\u5355\u72ec\u4f5c\u4e3a\u7ed3\u675f\u884c\u3002 eslint: 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);\n}\n"))),Object(o.b)("li",{parentName:"ul"},Object(o.b)("p",{parentName:"li"},"\u5728\u6784\u9020\u51fd\u6570\u91cc\u7ed1\u5b9a\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u3002 eslint: ",Object(o.b)("a",Object(a.a)({parentName:"p"},{href:"https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-bind.md"}),Object(o.b)("inlineCode",{parentName:"a"},"react/jsx-no-bind"))),Object(o.b)("blockquote",{parentName:"li"},Object(o.b)("p",{parentName:"blockquote"},"Why? render \u51fd\u6570\u4e2d\u7684\u7ed1\u5b9a\u8c03\u7528\u5728\u6bcf\u6b21 render \u7684\u65f6\u5019\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u51fd\u6570\u3002")),Object(o.b)("pre",{parentName:"li"},Object(o.b)("code",Object(a.a)({parentName:"pre"},{className:"language-jsx"}),"// bad\nclass extends React.Component {\n onClickDiv() {\n // do stuff\n }\n\n render() {\n return <div onClick={this.onClickDiv.bind(this)} />;\n }\n}\n\n// good\nclass extends React.Component {\n constructor(props) {\n 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