{"id":156716,"date":"2020-09-16T06:09:43","date_gmt":"2020-09-15T22:09:43","guid":{"rendered":"http:\/\/4563.org\/?p=156716"},"modified":"2020-09-16T06:09:43","modified_gmt":"2020-09-15T22:09:43","slug":"%e6%80%8e%e4%b9%88%e7%bc%96%e5%86%99%e4%b8%80%e4%b8%aa%e5%90%8c%e6%97%b6%e6%94%af%e6%8c%81-callback-%e5%92%8c-promise-%e9%a3%8e%e6%a0%bc%e7%9a%84%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=156716","title":{"rendered":"\u600e\u4e48\u7f16\u5199\u4e00\u4e2a\u540c\u65f6\u652f\u6301 callback \u548c promise \u98ce\u683c\u7684\u51fd\u6570"},"content":{"rendered":"
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\u600e\u4e48\u7f16\u5199\u4e00\u4e2a\u540c\u65f6\u652f\u6301 callback \u548c promise \u98ce\u683c\u7684\u51fd\u6570 <\/h1>\n

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\u8cc7\u6df1\u5927\u4f6c : youmoo <\/span> <\/i> 6<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u5047\u8bbe\u7ed9\u51fa\u5982\u4e0b\u4ee3\u7801\u6a21\u677f\uff1a<\/p>\n

\/\/ \u4e00\u4e2a\u5f02\u6b65\u51fd\u6570 function someFun(callback) {}  \/\/ \u53ef\u4ee5\u4f20 callback \u6267\u884c someFun(console.log);  \/\/ \u53ef\u4ee5\u8fd4\u56de Promise someFun().then(console.log); <\/code><\/pre>\n
someFun<\/code>\u51fd\u6570\u8981\u5982\u4f55\u7f16\u5199\u624d\u80fd\u652f\u6301 2 \u79cd\u8c03\u7528\u98ce\u683c\u5462\uff1f<\/p>\n
\u6211\u5199\u4e86\u7bc7\u6587\u7ae0\u8fdb\u884c\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u6b22\u8fce\u62cd\u7816\u3002<\/p>\n
JavaScript: \u5982\u4f55\u7f16\u5199\u4e00\u4e2a\u65e2\u652f\u6301 Callback \u53c8\u652f\u6301 Promise \u98ce\u683c\u7684\u51fd\u6570<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (11<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
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     \u8cc7\u6df1\u5927\u4f6c : moult <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 var a=new promise(…);
    if(callback) a.then(callback) else return a;                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : youmoo <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @moult \u53ef\u884c\u3002\u4e0d\u8fc7\u53ef\u4ee5\u4f18\u5148 callback, \u65e0 callback \u65f6\u518d new promise\uff0c\u8fd9\u6837\u53ef\u4ee5\u7701\u4e00\u4e2a promise \u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : zhuangzhuang1988 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 https:\/\/github.com\/ElemeFE\/element\/blob\/dev\/packages\/form\/src\/form.vue#L109<\/p>\n
    \u8fdb\u7a0b\u7528\u7684                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : youmoo <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @zhuangzhuang1988 \u55ef\u3002\u5f88\u591a\u5e93\u6216\u6846\u67b6\u90fd\u6709\u7528\u5230\u8fd9\u79cd\u98ce\u683c\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : tikazyq <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 typeof \u5e94\u8be5\u53ef\u4ee5\u89e3\u51b3\u4f60\u7684\u95ee\u9898                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : flowfire <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8fd9\u3002\u3002\u3002\u3002\u611f\u89c9\u50cf\u662f promisify \uff1f
    \u6b63\u5e38\u60c5\u51b5\u5c31\u662f\u5224\u65ad\u53c2\u6570\u662f\u5426\u5b58\u5728\u5427                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : lovecy <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 typof callback === “function”                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : tangchi695 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5224\u65ad\u6709\u6ca1\u6709 callback \u4e0d\u5c31\u5b8c\u4e8b\u513f\u4e86\u5417                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : momocraft <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4e0d\u7ba1\u6709\u6ca1\u6709 callback \u90fd\u8fd4\u56de promise
    \u5982\u679c\u6709 callback \u5c31 then \u4e00\u4efd                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : lin07hui <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 function someFun(callback) {
     const res = { data: “…” };
     typeof callback === “function” && callback(res);
     return Promise.resolve(res);
    }                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : hupo0 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @youmoo \u8fde\u8fd4\u56de\u7c7b\u578b\u90fd\u4e0d\u4e00\u6837\u4e86\uff0c\u6700\u597d\u5206\u5f00\u6210\u4e24\u4e2a\u51fd\u6570                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    \u600e\u4e48\u7f16\u5199\u4e00\u4e2a\u540c\u65f6\u652f\u6301 callba…<\/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\/156716"}],"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=156716"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/156716\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=156716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=156716"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=156716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}