{"id":5124,"date":"2016-06-24T11:18:24","date_gmt":"2016-06-24T03:18:24","guid":{"rendered":"https:\/\/sdeno.com\/?p=5124"},"modified":"2017-02-08T14:15:12","modified_gmt":"2017-02-08T06:15:12","slug":"es6-javascript-promise%e7%9a%84%e6%8f%92%e4%bb%b6%e5%b0%81%e8%a3%85-promise-js","status":"publish","type":"post","link":"https:\/\/sdeno.com\/?p=5124","title":{"rendered":"ES6 JavaScript Promise\u7684\u63d2\u4ef6\u5c01\u88c5--promise.js"},"content":{"rendered":"<p>js \u56de\u8c03 \u5f02\u6b65 \u52a0\u8f7d \u56de\u5230<\/p>\n<p>Promise\u53ea\u662f\u4e00\u79cd\u4ee3\u7801\u5f62\u5f0f\uff0c\u8ba9\u6211\u4eec\u7684\u4ee3\u7801\u66f4\u7b80\u6d01\u3001\u6613\u8bfb\u61c2\uff0c\u66f4\u597d\u7ef4\u62a4\u800c\u5df2\u3002<\/p>\n<p>\u4e0d\u50cf\u4f20\u7edf\u7684JS\u4ee3\u7801\u4e00\u4e2a\u5c42\u5c42\u7684\u5d4c\u5957\uff0c\u770b\u7740\u4e71\u3002<\/p>\n<pre>\/\/\u4f20\u7edf\u56de\u8c03\r\n\r\n$('div1').animate({},function(){\r\n  $('div2').animate({},function(){\r\n     $('div3').animate({},function(){\r\n         $('div4').animate({},function(){});\r\n     })\r\n  });\r\n});\r\n\r\n<\/pre>\n<p>\u4f20\u7edf\u4ee3\u7801\u662f\u4e0d\u662f\u770b\u7740\u5fc3\u70e6\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4f7f\u7528Promise\u5f62\u5f0f\u867d\u7136\u4e5f\u662f\u5d4c\u5957\uff0c\u4f46\u662f\u770b\u7740\u8212\u670d\u4e5f\u6613\u8bfb\u61c2<\/p>\n<pre>Promise($('div1'))\r\n  .then(function() { $('div2') }) \r\n  .then(function() { $('div3') }) \r\n  .then(function() { $('div4') });<\/pre>\n<p>&nbsp;<\/p>\n<p>\u5728\u6b64\u4e4b\u524d\u4e5f\u4ecb\u7ecd\u8fc7\u51e0\u4e2a\u4e0d\u9519\u7684Promise\u63d2\u4ef6\uff0c\u5982\uff1a<\/p>\n<p>\u300a<a href=\"https:\/\/sdeno.com\/?p=5017\" target=\"_blank\">JavaScript\u5f02\u6b65\u7f16\u7a0b\u63d2\u4ef6\u2013jsDeferred.js<\/a>\u300b<br \/>\n\u300a<a href=\"https:\/\/sdeno.com\/?p=3815\" target=\"_blank\">jquery Deferred\u5bf9\u8c61 \u5ef6\u8fdf\u5bf9\u8c61<\/a>\u300b<br \/>\n\u300a<a href=\"https:\/\/sdeno.com\/?p=4848\" target=\"_blank\">js\u5f02\u6b65\u6a21\u5757\u4ee5\u53ca\u56de\u8c03&#8211;async.js<\/a>\u300b<br \/>\n\u5728ES6\u4e2d\u65b0\u52a0\u4e86Promise\u7684\u673a\u5236\uff0c\u4f46\u662f\u5bf9\u4e8e\u4f4e\u7248\u672c\u7684\u6d4f\u89c8\u5668\u4e0d\u517c\u5bb9\uff0c\u6240\u4ee5\u6709\u4e86promise.js\uff0c\u5b83\u53ef\u4ee5\u517c\u5bb9IE7\u4ee5\u4e0a\u6d4f\u89c8\u5668\u3002<\/p>\n<p>\uff08\u4f60\u53ef\u4ee5\u4f7f\u7528ES6\u65b0\u8bed\u6cd5\u5199\uff0c\u4f46\u662f\u8fd9\u6837\u5c31\u4e0d\u4f1a\u517c\u5bb9IE7\u90a3\u4e9b\u4f4e\u7248\u672c\u6d4f\u89c8\u5668\u4e86\uff09<\/p>\n<p>&nbsp;<\/p>\n<pre><span style=\"color: #ff0000;\">Promise.all([])  \/\/\u603b\u662f\u5728\u6700\u540e\u624d\u88ab\u6267\u884c<\/span>\r\n\r\nvar promise1 = Promise.resolve(3);\r\n\r\nPromise.all([function(){i++;document.title=i+'---';},promise1]).then(function(values){\r\n (values[0])();   \/\/2  \u867d\u7136\u5728\u58f0\u660e\u53d8\u91cfi\u7684\u524d\u9762\uff0c\u4f46\u662f\u603b\u5728\u6700\u540e\u6267\u884c\u6240\u4ee5\u80fd\u83b7\u53d6\u5230i\u53d8\u91cf\r\n console.log(values[1]);  \/\/ \u83b7\u53d6\u5230\u7684\u662fpromise1\u7684\u503c\r\n});\r\n\r\n\r\nvar i=0; \r\n++i;\r\n\r\n...\r\n...\r\n\u4e0d\u7ba1\u8fd9\u91cc\u4ee3\u7801\u591a\u5c11<span style=\"color: #ff0000;\">Promise.all\u6c38\u8fdc\u5728\u6700\u540e\u624d\u6267\u884c<\/span>\r\n\r\n\/\/Promise.all\u5373\u4f7f\u653e\u5728\u58f0\u660e\u53d8\u91cf\u7684\u524d\u9762\uff0c\u4f46\u662f\u6267\u884c\u7684\u987a\u5e8f\u662f\u7b49\u5f85\u5176\u4ed6JS\u6267\u884c\u5b8c\u6210\u540e\u624d\u80fd\u6267\u884c\r\n\r\n<\/pre>\n<pre><span style=\"color: #ff0000;\">Promise.race \/\/\u6700\u5feb\u7684\u5148\u6267\u884c<\/span>\r\n\r\nvar p1 = new Promise(function(resolve, reject) {\r\n setTimeout(resolve, 500, function(){document.getElementById('box1').style.background='yellow'});\r\n});\r\nvar p2 = new Promise(function(resolve, reject) {\r\n setTimeout(resolve, 100, function(){document.getElementById('box2').style.background='#000'});\r\n});\r\n\r\n Promise.race([p1, p2]).then(function(value) {\r\n   (value)();\r\n   \/\/\u6700\u5feb\u7684\u5148\u6267\u884c\r\n });<\/pre>\n<p>&nbsp;<\/p>\n<p>\u4f7f\u7528\u65b9\u6cd5\uff1a<\/p>\n<pre>.then(function(){},function(){}) \/\/\u7b2c\u4e00\u4e2a\u6210\u529f\u56de\u8c03\u5904\u7406\uff0c\u7b2c\u4e8c\u4e2a\u662f\u5931\u8d25\u4f1a\u61c2\u554a\u5904\u7406\r\n\r\nPromise.resolve(value) \/\/\u8fd4\u56de\u4e00\u4e2avalue\u503c\uff0c\u6b64\u503c\u662f\u6fc0\u6d3b\u6210\u529f\u72b6\u6001\u4e0b\u6267\u884c\u7684\u3002\r\nPromise.reject(reason) \/\/\u6fc0\u6d3b\u5931\u8d25\r\n\r\nPromise.all([]).then \/\/ \u6536\u96c6\u6570\u7ec4\u91cc\u7684\u503c\uff0c\u5e76\u6267\u884c\u56de\u8c03\r\nPromise.race([]).then \/\/\u83b7\u53d6\u6700\u5148\u8fd4\u56de\u7684\u503c\uff0c\u5c31\u7acb\u9a6c\u56de\u8c03<\/pre>\n<p>\u5982\u679c\u60f3\u4f7f\u7528done()\u65b9\u6cd5\uff0c\u90a3\u8fd8\u9700\u8981\u52a0\u8f7dpromise-done-7.0.4.min.js<\/p>\n<p>\u5177\u4f53\u53c2\u8003\u5b98\u7f51\uff1a<a href=\"https:\/\/www.promisejs.org\/\" target=\"_blank\">https:\/\/www.promisejs.org\/<\/a><\/p>\n<p><a href=\"https:\/\/sdeno.com\/wp-content\/uploads\/2016\/06\/promise-7.0.4.min_.js\">promise-7.0.4.min<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>js \u56de\u8c03 \u5f02\u6b65 \u52a0\u8f7d \u56de\u5230 Promise\u53ea\u662f\u4e00\u79cd\u4ee3\u7801\u5f62\u5f0f\uff0c\u8ba9\u6211\u4eec\u7684\u4ee3\u7801\u66f4\u7b80\u6d01\u3001\u6613\u8bfb\u61c2\uff0c\u66f4\u597d\u7ef4\u62a4\u800c\u5df2\u3002 \u4e0d\u50cf [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-5124","post","type-post","status-publish","format-standard","hentry","category-11"],"_links":{"self":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/5124","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5124"}],"version-history":[{"count":0,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/5124\/revisions"}],"wp:attachment":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5124"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5124"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5124"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}