{"id":446,"date":"2025-04-10T15:34:47","date_gmt":"2025-04-10T07:34:47","guid":{"rendered":"https:\/\/blog.laning.org\/?p=446"},"modified":"2025-04-10T15:34:47","modified_gmt":"2025-04-10T07:34:47","slug":"%e5%bc%82%e6%ad%a5%e5%87%bd%e6%95%b0async%e5%92%8cawait","status":"publish","type":"post","link":"https:\/\/blog.laning.org\/index.php\/2025\/04\/10\/446\/","title":{"rendered":"\u5f02\u6b65\u51fd\u6570async\u548cawait"},"content":{"rendered":"\n

\u80cc\u666f<\/h2>\n\n\n\n

\u6700\u8fd1\u5728\u56de\u5934\u770bnfd\u9879\u76ee<\/a> \u7684\u6e90\u7801\uff0c\u770b\u5230\u4e86\u4f7f\u7528async\u548cawait\u7684js\u4ee3\u7801\uff0c\u56e0\u6b64\u60f3\u4e86\u89e3\u4e00\u4e0b\u4ee3\u7801\u8fd0\u884c\u7684\u673a\u5236\u3002<\/p>\n\n\n\n

\u4e00\u4e2a\u4f8b\u5b50<\/h2>\n\n\n\n
function SicBo() {
 return new Promise((resolve, reject) => {
   console.log(\"\u5f00\u59cb\u6447\")
   setTimeout(() => {
     let n = parseInt(Math.random() * 6 + 1, 10)
     resolve(n)
  }, 1000)
})
}<\/code><\/pre>\n\n\n\n
\u4e0a\u8ff0\u4ee3\u7801\u7684\u6267\u884c\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/h3>\n\n\n\n
    \n
  • \u7acb\u5373\u6267\u884c console.log(\"\u5f00\u59cb\u6447\")<\/code><\/strong> \u2014\u2014 \u2705 \u9a6c\u4e0a\u8f93\u51fa\u3002<\/li>\n\n\n\n
  • \u542f\u52a8\u4e00\u4e2a\u201c1\u79d2\u540e\u6267\u884c\u7684\u4efb\u52a1\u201d<\/strong> \u2014\u2014 \u901a\u8fc7 setTimeout(...)<\/code> \u6ce8\u518c\u4e86\u4e00\u4e2a\u56de\u8c03\uff0c1 \u79d2\u540e\u6267\u884c\u3002<\/li>\n\n\n\n
  • \u8fd4\u56de\u4e00\u4e2a Promise \u5bf9\u8c61<\/strong>\uff0c\u8fd9\u4e2a Promise \u4f1a\u5728 1 \u79d2\u540e\u53d8\u6210\u201c\u5b8c\u6210\u72b6\u6001\u201d\u5e76\u7ed9\u51fa\u70b9\u6570\u3002<\/li>\n<\/ul>\n\n\n\n
    \u5982\u679c\u76f4\u63a5\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\uff1a<\/h3>\n\n\n\n
    function test() {
     const result = SicBo()
     console.log('\u9ab0\u5b50\u7ed3\u679c:', result)
    }
    test()<\/code><\/pre>\n\n\n\n
    \u8c03\u7528\u8f93\u51fa\u5982\u4e0b\uff1a<\/p>\n\n\n\n
    \u5f00\u59cb\u6447
    \u9ab0\u5b50\u7ed3\u679c: Promise { <pending> }<\/code><\/pre>\n\n\n\n
    \u663e\u7136\u5e76\u4e0d\u662f\u6211\u4eec\u60f3\u8981\u7684\u7ed3\u679c<\/p>\n\n\n\n
    \u5f02\u6b65\u51fd\u6570\u7684\u4e00\u822c\u8c03\u7528\uff1a<\/h3>\n\n\n\n
    SicBo().then(result => {
     console.log('\u9ab0\u5b50\u7ed3\u679c:', result)
    })<\/code><\/pre>\n\n\n\n
    \u8fd9\u79cd\u5199\u6cd5\u6700\u5927\u7684\u5f0a\u7aef\u662f\u4f1a\u4ea7\u751f\u56de\u8c03\u5730\u72f1\uff0c\u5373\u8c03\u7528\u591a\u4e2a\u5f02\u6b65\u51fd\u6570\u4ea7\u751f\u5d4c\u5957\uff0c\u5bfc\u81f4\u4ee3\u7801\u53ef\u8bfb\u6027\u53d8\u5dee\u3002<\/p>\n\n\n\n
    \u5f02\u6b65\u51fd\u6570\u7684async\u548cawait\u8c03\u7528\uff1a<\/h3>\n\n\n\n
    async function test() {
     const result = await SicBo()
     console.log('\u9ab0\u5b50\u7ed3\u679c:', result)
    }
    test()<\/code><\/pre>\n\n\n\n
    \u8c03\u7528\u8f93\u51fa\u5982\u4e0b\uff1a<\/p>\n\n\n\n
    \u5f00\u59cb\u6447
    \uff08\u7b49\u5f851\u79d2\uff09
    \u9ab0\u5b50\u7ed3\u679c: 3<\/code><\/pre>\n\n\n\n
    \u5f02\u6b65\u51fd\u6570\u5916\u90e8\u8c03\u7528<\/h3>\n\n\n\n
    async function demo() {
     console.log('A. \u5f00\u59cb')
     await SicBo()
     console.log('B. \u7ed3\u675f')
    }
    \u200b
    demo()
    console.log('C. \u6211\u662f\u5176\u4ed6\u903b\u8f91')<\/code><\/pre>\n\n\n\n
    \u8c03\u7528\u8f93\u51fa\u5982\u4e0b\uff1a<\/p>\n\n\n\n
    A. \u5f00\u59cb
    \u5f00\u59cb\u6447
    C. \u6211\u662f\u5176\u4ed6\u903b\u8f91
    \uff08\u7b49\u5f851\u79d2\uff09
    B. \u7ed3\u675f<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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