{"id":109593,"date":"2020-06-01T23:42:58","date_gmt":"2020-06-01T15:42:58","guid":{"rendered":"http:\/\/4563.org\/?p=109593"},"modified":"2020-06-01T23:42:58","modified_gmt":"2020-06-01T15:42:58","slug":"%e5%85%b3%e4%ba%8e-react-hooks-%e4%b8%80%e4%b8%aa%e5%8f%af%e8%83%bd%e8%b7%9f%e6%80%a7%e8%83%bd%e6%9c%89%e5%85%b3%e7%9a%84%e7%96%91%e9%97%ae","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=109593","title":{"rendered":"\u5173\u4e8e react-hooks \u4e00\u4e2a\u53ef\u80fd\u8ddf\u6027\u80fd\u6709\u5173\u7684\u7591\u95ee"},"content":{"rendered":"
\n
\n
\n

\u5173\u4e8e react-hooks \u4e00\u4e2a\u53ef\u80fd\u8ddf\u6027\u80fd\u6709\u5173\u7684\u7591\u95ee <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : cl903254852 <\/span> <\/i> 0<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u6700\u8fd1\u4ece class component \u5207\u6362\u5230 react hooks \u5199\u6cd5.<\/p>\n

\u6bd4\u5982\u4e0b\u9762\u8fd9\u4e2a\u4f8b\u5b50\uff1a<\/p>\n

 function Demo(){     const [count, setCount] = useState(0);          useEffect(()=>{          },[])          const func_1 = () => { \/\/... }     const func_2 = () => { \/\/... }     const func_3 = () => { \/\/... }     \/\/ \u8fd9\u91cc\u8fd8\u6709 const \u5176\u4ed6\u53d8\u91cf...          return <div\/> } <\/code><\/pre>\n
\u6211\u53d1\u73b0\uff0c\u53ea\u8981\u72b6\u6001\u6539\u53d8\uff0cDemo \u8fd9\u4e2a\u51fd\u6570\u5c31\u4f1a\u91cd\u65b0\u6267\u884c\u4e00\u6b21\uff0c \u4e5f\u5c31\u662f\u8bf4\u5b9a\u4e49\u5728 Demo \u91cc\u7684\u6240\u6709\u53d8\u91cf\u6bcf\u6b21 render \u65f6\u90fd\u4f1a\u91cd\u65b0\u5b9a\u4e49\uff0c \u8fd9\u6837\u4e0d\u4f1a\u6709\u6027\u80fd\u95ee\u9898\u5417\uff1f<\/p>\n
\u800c\u4e14 Demo \u8fd9\u4e2a\u51fd\u6570\u4e2d\u8fd4\u56de\u4e86\u7ec4\u4ef6 jsx\uff0c\u5b83\u4e0d\u5c31\u662f class component \u91cc\u7684 render \u65b9\u6cd5\u5417\uff1f \u76f8\u5f53\u4e8e\u6211\u8fd9\u4e9b\u5b9a\u4e49\u7684\u53d8\u91cf\u662f\u5728 render \u65b9\u6cd5\u91cc\u5b9a\u4e49\u7684\uff1f<\/p>\n
    \n
  • \u5927\u5bb6\u5728\u5199 react hooks \u65f6\uff0c\u5bf9\u4e8e\u8fd9\u4e9b\u662f\u600e\u4e48\u5904\u7406\u7684\uff1f<\/li>\n
  • \u6709\u6ca1\u6709\u5176\u4ed6\u4f1a\u5f71\u54cd\u6027\u80fd\u7684\u5730\u65b9\uff1f<\/li>\n<\/ul>\n
    \u9119\u4eba\u4e5f\u662f\u521a\u5165\u624b react hooks , \u671b\u5927\u5bb6\u6307\u70b9\u4e00\u4e8c\uff0cThanks\u266a(\uff65\u03c9\uff65)\uff89<\/p>\n<\/p><\/div>\n
     \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (21<\/span>)        <\/div>\n
     <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
      \n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : CodingNaux <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u770b\u6587\u6863                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : lbw <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   1. \u793a\u4f8b\u4ee3\u7801\u7684 Demo \u51fd\u6570\u5c31\u662f\u51fd\u6570\u5f0f\u7ec4\u4ef6\uff0c\u90a3\u4e48\u5728\u7ec4\u4ef6 props \u53d8\u5316\u6216 hook \u72b6\u6001\u6539\u53d8\uff0c\u5fc5\u7136\u8981\u901a\u8fc7\u8c03\u7528\u6574\u4e2a Demo \u51fd\u6570\u6765\u4ea7\u751f\u65b0\u7684 vnode\uff0c\u8fdb\u800c\u66f4\u65b0 dom\uff0c\u56e0\u4e3a\u51fd\u6570\u5f0f\u7ec4\u4ef6\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u51fd\u6570\uff01\uff01\u5b83\u53ea\u6709\u901a\u8fc7\u91cd\u65b0\u8c03\u7528\u624d\u80fd\u4ea7\u751f\u65b0\u7684\u526f\u4f5c\u7528\uff0c\u800c\u4e0d\u50cf class \u53ef\u901a\u8fc7\u8c03\u7528 render
      2. \u5bf9\u5e94\u7684\u4f60\u8bf4\u7684\u56e0\u6bcf\u6b21\u8c03\u7528 Demo \u800c\u4ea7\u751f\u7684\u6027\u80fd\u95ee\u9898\uff0creact \u5b98\u65b9\u901a\u8fc7 hook \u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff08\u5373\u4e0a\u6587 useEffect \u7684\u7a7a\u6570\u7ec4\uff09\u6765\u5b9e\u73b0\u5728\u6bcf\u6b21 Demo \u51fd\u6570\u8c03\u7528\u671f\u95f4\u5b9e\u73b0\u4f7f\u7528\u7f13\u5b58\uff0c\u800c\u4e0d\u662f\u6bcf\u6b21\u90fd\u91cd\u65b0\u8ba1\u7b97\uff0c\u8fd9\u4e5f\u662f hook \u7684\u7279\u6027\u4e4b\u4e00
      3. \u5176\u4ed6\u6bd4\u5982 useCallback useMemo \u7b49 hook \u5747\u662f\u901a\u8fc7\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6570\u7ec4\u6765\u7533\u660e hook \u7684\u4f9d\u8d56\uff0c\u8fdb\u800c\u5b9e\u73b0\u590d\u7528\u7f13\u5b58
      4. class \u4e2d render \u8d77\u5230\u7684\u4f5c\u7528\u5c31\u662f\u8c03\u7528\u51fd\u6570\u5f0f\u7ec4\u4ef6\u7684\u8c03\u7528\u7ed3\u679c\u2014\u2014\u4ea7\u751f\u65b0\u7684 vnode\uff0c\u8fdb\u800c\u901a\u8fc7\u534f\u8c03\u7b97\u6cd5\u66f4\u65b0\u89c6\u56fe\u3002class \u7ec4\u4ef6\u548c\u51fd\u6570\u5f0f\u7ec4\u4ef6\u7684\u672c\u8d28\u533a\u522b\u4e4b\u4e00\u5c31\u662f class \u81ea\u5e26\u751f\u547d\u5468\u671f\u548c\u72b6\u6001                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : whe <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   useMemo & useCallback                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : duan602728596 <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u53ef\u4ee5\u7528 useMemo \u548c useCallback\uff0c\u8ba9\u53d8\u91cf\u6216\u8005\u51fd\u6570\u53ea\u5728\u4f9d\u8d56\u53d8\u5316\u65f6\u91cd\u65b0\u8ba1\u7b97\u3002
      \u6027\u80fd\u7684\u8bdd\uff0c\u5927\u90e8\u5206\u9879\u76ee\u8fd8\u6ca1\u6709\u590d\u6742\u5230\u5fc5\u987b\u8fdb\u884c\u6027\u80fd\u4f18\u5316\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : CodingNaux <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u6709\u4e9b\u51fd\u6570\u90fd\u6ca1\u5fc5\u8981\u7528 useCallback \u5305\u88f9\uff0c\u4e22\u5728\u7ec4\u4ef6\u5916\u9762\u5c31\u53ef\u4ee5\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : CodingNaux <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u6709\u4e9b\u7b80\u5355\u8ba1\u7b97\u6ca1\u5fc5\u8981\u7528 useMemo \u5305\u88f9                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : zhuangzhuang1988 <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   react \u5c31\u8fd9\u6837 \u5f15\u5165 hook \u5fc3\u667a\u8d1f\u62c5\u53d8\u5f97\u66f4\u5927\u4e86<\/p>\n
      vue \u76f8\u5bf9\u597d\u5f88\u591a, \u4e0d\u8fc7\u4e5f\u6709\u5751, \u5f88\u5bb9\u6613\u7ec4\u4ef6\u5c31\u4e0d\u54cd\u5e94\u5f0f\u4e86                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : pyplayer <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   https:\/\/kedong.me\/article\/17                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : lancelock <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u6700\u8fd1\u4e5f\u5728\u5199 hooks \u3002\u4f18\u70b9\u662f\u5f88\u660e\u663e\uff0c\u4f46\u611f\u89c9\u5e76\u975e\u5b8c\u7f8e\u65b9\u6848                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : zhuweiyou <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u592a\u5c0f\u770b \u73b0\u4ee3\u7535\u8111 \/\u624b\u673a\u4e86\uff0c\u4e00\u822c\u7684\u573a\u666f\uff0c\u8fd8\u6ca1\u5230\u6027\u80fd\u4f18\u5316\u7684\u5730\u6b65\u3002\u6709\u8fd9\u529f\u592b\u8fd8\u4e0d\u5982\u60f3\u60f3\uff0c\u600e\u4e48\u4f18\u5316\u4e00\u4e0b\u7528\u6237\u4f53\u9a8c\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : fanchangyong <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u53d8\u91cf\u5b9a\u4e49\u672c\u8eab\u7684\u6027\u80fd\u6d88\u8017\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\u7684\uff0c\u5982\u679c\u4f60\u7684\u53d8\u91cf\u5b9a\u4e49\u4f9d\u8d56\u4e00\u4e2a\u590d\u6742\u8fd0\u7b97\u7684\u7ed3\u679c\uff0c\u90a3\u4e48\u8fd9\u4e2a\u8fd0\u7b97\u53ef\u4ee5\u7528 useMemo \u6765\u7f13\u5b58\u7ed3\u679c\uff0c\u5728\u4f9d\u8d56\u4e0d\u53d8\u7684\u60c5\u51b5\u4e0b\u4e0d\u4f1a\u91cd\u590d\u6267\u884c\u8ba1\u7b97\u8fc7\u7a0b\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : WeiShurong <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u4e0a\u90fd\u8bf4\u7684\u5f88\u597d\u4e86\u3002\u8865\u5145\u4e00\u4e0b\uff0c\u5982\u679c\u4f60\u771f\u7684\u5f88\u5728\u4e4e render \u7684\u6b21\u6570\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 React.memo \u5305\u88f9\u51fd\u6570\u5f0f\u7ec4\u4ef6\uff0c\u8fd9\u6837\u53ea\u6709 prop \u53d8\u66f4\u65f6\uff0c\u624d\u4f1a\u8c03\u7528\uff08\u548c shouldComponentUpdate \u4e00\u6837\uff09                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : joesonw <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   1. \u6709\u6539\u53d8\u53ea\u4f1a\u662f vdom \u6539\u53d8, \u4e4b\u540e\u8fd8\u8981\u505a diff \u7684. \u5f71\u54cd\u6027\u80fd\u662f\u5728\u662f\u5ffd\u7565\u4e0d\u8ba1\u4e86.
      2. hook \u672c\u8eab\u6709\u7f13\u5b58\u673a\u5236, \u5584\u7528. \u4f8b\u5982\u56de\u8c03\u7528 useCallback \u7684\u8bdd, \u53ea\u5728 dependency list \u53d8\u5316\u7684\u60c5\u51b5\u4e0b\u624d\u4f1a\u91cd\u65b0\u53d6\u503c(\u53d6\u51fd\u6570)                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : love <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u522b\u8bf4\u4f1a\u91cd\u65b0\u6267\u884c\u51fd\u6570\u4e86\uff0c\u66f4\u5927\u7684\u5751\u662f\u5c0f\u5fc3\u522b\u5f15\u7528\u4e86\u65e7\u53d8\u91cf\u3002<\/p>\n
      \u6240\u4ee5\u6211\u89c9\u5f97 vue \u7248 hooks \u662f\u66f4\u4f18\u8bbe\u8ba1                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : seki <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u865a\u62df dom \u8ba1\u7b97\u8fd9\u4e00\u5c42\u662f\u7eaf js \u7684\uff0c\u4e00\u822c\u6765\u8bb2\u5bf9\u6027\u80fd\u5f71\u54cd\u4e0d\u5927\u3002\u6539\u53d8 dom \u5bf9\u6027\u80fd\u7684\u5f71\u54cd\u662f\u66f4\u4e3b\u8981\u7684<\/p>\n
      \u5176\u5b83\u7684\uff0c\u5728\u4e86\u89e3 hooks \u4e4b\u524d\u5148\u4e86\u89e3\u4e00\u4e0b function component \u66f4\u597d                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : ChefIsAwesome <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u6709\u5f71\u54cd\u3002\u5927\u4e0d\u5927\u770b\u4f60\u7ec4\u4ef6\u590d\u6742\u4e0d\u590d\u6742\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : sucai <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u5728\u5916\u9762\u7528 react.memo \u5305\u4e00\u4e0b Demo                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : dcatfly <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u5efa\u8bae\u5148\u5b8c\u6574\u9605\u8bfb\u4e00\u904d react hooks \u76f8\u5173\u7684\u6587\u6863\uff0c\u4f60\u8bf4\u7684\u8fd9\u4e9b\u95ee\u9898\u6587\u6863\u90fd\u6709\u89e3                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : myCupOfTea <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u6709\u5f71\u54cd,\u4e0d\u8fc7\u4e0d\u662f\u592a\u592a\u592a\u590d\u6742\u7684\u7cfb\u7edf\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1,\u6240\u4ee5\u624d\u6709\u4e86 useRef useMemo useCallback                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : limi58 <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u4e00\u822c\u91cd\u590d\u5b9a\u4e49\u53ea\u662f\u5b9a\u4e49\u800c\u5df2\uff0c\u6027\u80fd\u6d88\u8017\u5ffd\u7565\u4e0d\u8ba1\uff0c\u5e76\u6ca1\u6709\u590d\u6742\u8fd0\u7b97\uff0c\u5982\u679c\u6709\uff0cuseMemo useCallback \u76f4\u63a5\u4e0a\u573a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n
      \n
      \n
       \u8cc7\u6df1\u5927\u4f6c : royzxq <\/span>  <\/div>\n
       <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                   \u5408\u7406\u5229\u7528 useMemo useCallback                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
    • \n","protected":false},"excerpt":{"rendered":"
      \u5173\u4e8e react-hooks \u4e00\u4e2a…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/109593"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=109593"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/109593\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=109593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=109593"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=109593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}