{"id":8267,"date":"2023-11-28T20:21:06","date_gmt":"2023-11-28T12:21:06","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=8267"},"modified":"2023-12-02T22:07:45","modified_gmt":"2023-12-02T14:07:45","slug":"vue-zhong-jie-shi-yi-xia-shen-me-shipromise","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/vue-zhong-jie-shi-yi-xia-shen-me-shipromise\/","title":{"rendered":"Vue \u4e2d\u89e3\u91ca\u4e00\u4e0b\u4ec0\u4e48\u662f promise\uff1f"},"content":{"rendered":"<p>\u5728 Vue \u4e2d\uff0cPromise\uff08\u627f\u8bfa\uff09\u662f JavaScript \u4e2d\u4e00\u79cd\u7528\u4e8e\u5904\u7406\u5f02\u6b65\u64cd\u4f5c\u7684\u5bf9\u8c61\u3002\u5b83\u4ee3\u8868\u4e00\u4e2a\u5c1a\u672a\u5b8c\u6210\u3001\u4f46\u9884\u8ba1\u4f1a\u5728\u672a\u6765\u5b8c\u6210\u7684\u5f02\u6b65\u64cd\u4f5c\uff0c\u901a\u8fc7\u5b83\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u7ba1\u7406\u548c\u5904\u7406\u5f02\u6b65\u4ee3\u7801\u3002<\/p>\n<h3><a id=\"promise%E7%9A%84%E7%89%B9%E7%82%B9%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>Promise \u7684\u7279\u70b9\uff1a<\/h3>\n<ol>\n<li>\n<p><strong>\u72b6\u6001\uff1a<\/strong> Promise \u53ef\u4ee5\u5904\u4e8e\u4e09\u79cd\u72b6\u6001\u4e4b\u4e00\uff1apending\uff08\u7b49\u5f85\u6001\uff09\u3001fulfilled\uff08\u5df2\u5b8c\u6210\u6001\uff09\u3001rejected\uff08\u5df2\u62d2\u7edd\u6001\uff09\u3002\u4e00\u65e6\u72b6\u6001\u53d8\u66f4\uff0c\u5c31\u4e0d\u53ef\u518d\u6539\u53d8\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u94fe\u5f0f\u8c03\u7528\uff1a<\/strong> \u53ef\u4ee5\u901a\u8fc7 <code>.then()<\/code> \u65b9\u6cd5\u6765\u6ce8\u518c\u5f02\u6b65\u64cd\u4f5c\u5b8c\u6210\u540e\u7684\u5904\u7406\u903b\u8f91\uff0c\u5f62\u6210\u94fe\u5f0f\u8c03\u7528\uff0c\u6bcf\u4e2a <code>.then()<\/code> \u8fd4\u56de\u4e00\u4e2a\u65b0\u7684 Promise \u5bf9\u8c61\uff0c\u5141\u8bb8\u94fe\u5f0f\u8c03\u7528\u591a\u4e2a\u5904\u7406\u51fd\u6570\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u9519\u8bef\u5904\u7406\uff1a<\/strong> \u53ef\u4ee5\u4f7f\u7528 <code>.catch()<\/code> \u65b9\u6cd5\u6216\u5728\u94fe\u5f0f\u8c03\u7528\u4e2d\u7684 <code>.then()<\/code> \u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6765\u6355\u83b7 Promise \u94fe\u4e2d\u53d1\u751f\u7684\u9519\u8bef\u3002<\/p>\n<\/li>\n<\/ol>\n<h3><a id=\"promise%E7%9A%84%E5%9F%BA%E6%9C%AC%E8%AF%AD%E6%B3%95%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>Promise \u7684\u57fa\u672c\u8bed\u6cd5\uff1a<\/h3>\n<pre><code class=\"language-javascript\">\/\/ \u521b\u5efa\u4e00\u4e2a Promise \u5bf9\u8c61\nlet promise = new Promise((resolve, reject) =&gt; {\n  \/\/ \u5f02\u6b65\u64cd\u4f5c\uff0c\u6bd4\u5982\u53d1\u9001 HTTP \u8bf7\u6c42\u6216\u6267\u884c\u5176\u4ed6\u8017\u65f6\u64cd\u4f5c\n  \/\/ \u5982\u679c\u64cd\u4f5c\u6210\u529f\uff0c\u8c03\u7528 resolve \u5e76\u4f20\u9012\u7ed3\u679c\n  \/\/ \u5982\u679c\u64cd\u4f5c\u5931\u8d25\uff0c\u8c03\u7528 reject \u5e76\u4f20\u9012\u9519\u8bef\u4fe1\u606f\n  if (\/* \u64cd\u4f5c\u6210\u529f *\/) {\n    resolve(result); \/\/ \u6210\u529f\u65f6\u8c03\u7528 resolve\n  } else {\n    reject(error); \/\/ \u5931\u8d25\u65f6\u8c03\u7528 reject\n  }\n});\n\n\/\/ \u4f7f\u7528 Promise \u7684 then() \u65b9\u6cd5\u5904\u7406\u5f02\u6b65\u64cd\u4f5c\u7684\u7ed3\u679c\npromise.then(\n  (result) =&gt; {\n    \/\/ \u5904\u7406\u6210\u529f\u7684\u7ed3\u679c\n  },\n  (error) =&gt; {\n    \/\/ \u5904\u7406\u9519\u8bef\u60c5\u51b5\n  }\n);\n<\/code><\/pre>\n<p>\u5728 Vue \u4e2d\uff0cPromise \u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5f02\u6b65\u64cd\u4f5c\uff0c\u6bd4\u5982\u53d1\u9001 AJAX \u8bf7\u6c42\u3001\u5904\u7406\u6570\u636e\u3001\u7ec4\u4ef6\u751f\u547d\u5468\u671f\u7b49\u5f02\u6b65\u573a\u666f\uff0c\u5b83\u80fd\u591f\u6709\u6548\u5730\u7ba1\u7406\u548c\u7ec4\u7ec7\u5f02\u6b65\u4ee3\u7801\uff0c\u907f\u514d\u4e86\u56de\u8c03\u5730\u72f1\uff08callback hell\uff09\u5e76\u63d0\u4f9b\u4e86\u66f4\u6e05\u6670\u3001\u53ef\u8bfb\u6027\u66f4\u597d\u7684\u5f02\u6b65\u4ee3\u7801\u7f16\u5199\u65b9\u5f0f\u3002Vue \u672c\u8eab\u4e5f\u5728\u4e00\u4e9b\u5730\u65b9\uff08\u6bd4\u5982\u8def\u7531\u3001HTTP \u8bf7\u6c42\u7b49\uff09\u4f7f\u7528 Promise \u6765\u5904\u7406\u5f02\u6b65\u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Vue \u4e2d\uff0cPromise\uff08\u627f\u8bfa\uff09\u662f JavaScript \u4e2d\u4e00\u79cd\u7528\u4e8e\u5904\u7406\u5f02\u6b65\u64cd\u4f5c\u7684\u5bf9\u8c61\u3002\u5b83\u4ee3\u8868\u4e00\u4e2a\u5c1a\u672a\u5b8c [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-8267","post","type-post","status-publish","format-standard","hentry","category-vue"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=8267"}],"version-history":[{"count":3,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8267\/revisions"}],"predecessor-version":[{"id":14073,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8267\/revisions\/14073"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=8267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=8267"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=8267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}