{"id":166508,"date":"2024-05-08T15:38:35","date_gmt":"2024-05-08T07:38:35","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/166508.html"},"modified":"2024-05-08T15:38:39","modified_gmt":"2024-05-08T07:38:39","slug":"javascript%e6%9c%89%e6%b2%a1%e6%9c%89%e5%8a%9e%e6%b3%95%e5%ae%9e%e7%8e%b0%e4%b8%80%e4%b8%aa%e9%98%bb%e5%a1%9e%e5%bc%8f%e7%9a%84-jalert","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/166508.html","title":{"rendered":"javascript\u6709\u6ca1\u6709\u529e\u6cd5\u5b9e\u73b0\u4e00\u4e2a\u963b\u585e\u5f0f\u7684 jAlert"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26233623\/1322a784-906c-403f-a460-fe6ee84d1dc7.webp\" alt=\"javascript\u6709\u6ca1\u6709\u529e\u6cd5\u5b9e\u73b0\u4e00\u4e2a\u963b\u585e\u5f0f\u7684 jAlert\" \/><\/p>\n<p><p>JavaScript\u4e2d\u5b9e\u73b0\u4e00\u4e2a\u963b\u585e\u5f0f\u7684jAlert\u662f<strong>\u4e0d\u53ef\u80fd\u7684\uff0c\u56e0\u4e3aJavaScript\u662f\u5355\u7ebf\u7a0b\u4e14\u57fa\u4e8e\u4e8b\u4ef6\u5faa\u73af\u7684\u89e3\u91ca\u578b\u811a\u672c\u8bed\u8a00<\/strong>\u3002\u7136\u800c\uff0c\u53ef\u4ee5\u901a\u8fc7\u67d0\u4e9b\u5f02\u6b65\u7f16\u7a0b\u6a21\u5f0f\u6a21\u62df\u963b\u585e\u884c\u4e3a\uff0c\u5982\u4f7f\u7528<strong>Callbacks\u3001Promises\u3001async\/aw<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>t<\/strong>\u3002\u5728\u73b0\u4ee3\u7684\u524d\u7aef\u5f00\u53d1\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5f02\u6b65\u7f16\u7a0b\u7684\u6280\u5de7\u6765\u6a21\u62df\u7528\u6237\u7684\u4ea4\u4e92\u884c\u4e3a\uff0c\u8ba9\u4ee3\u7801\u5728\u7528\u6237\u54cd\u5e94\u4e4b\u540e\u518d\u7ee7\u7eed\u6267\u884c\uff0c\u4ece\u800c\u5f62\u6210\u7c7b\u4f3c\u963b\u585e\u6548\u679c\u3002<\/p>\n<\/p>\n<p><p>\u5bf9&quot;Blocking&quot;\uff08\u963b\u585e\uff09\u7684\u6a21\u62df\u901a\u5e38\u662f\u901a\u8fc7<strong>Promises\u4ee5\u53caasync\/await<\/strong>\u5b9e\u73b0\u7684\u3002<strong>async\/await<\/strong>\u7684\u5f15\u5165\uff0c\u4f7f\u5f97\u5f02\u6b65\u4ee3\u7801\u7684\u7f16\u5199\u66f4\u50cf\u662f\u540c\u6b65\u4ee3\u7801\u90a3\u6837\u7684\u76f4\u89c2\uff0c\u4ee3\u7801\u8bfb\u8d77\u6765\u50cf\u662f\u987a\u5e8f\u6267\u884c\uff0c\u4f46\u5b9e\u9645\u4e0a\u5e95\u5c42\u4f9d\u65e7\u662f\u975e\u963b\u585e\u7684\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u7406\u89e3javascript\u7684\u975e\u963b\u585e\u7279\u6027<\/h3>\n<\/p>\n<p><p>JavaScript\u8fd0\u884c\u65f6\uff0c\u7279\u522b\u662f\u5728Web\u6d4f\u89c8\u5668\u4e2d\u6267\u884c\u65f6\uff0c\u5b83\u7ba1\u7406\u7740\u4e00\u4e2a\u4e8b\u4ef6\u5faa\u73af\uff0c\u8fd9\u4e2a\u4e8b\u4ef6\u5faa\u73af\u80fd\u591f\u5904\u7406\u5f02\u6b65\u4e8b\u4ef6\u800c\u4e0d\u4f1a\u963b\u585e\u540e\u7eed\u4ee3\u7801\u7684\u6267\u884c\u3002\u5f53\u4e00\u4e2a\u5f02\u6b65\u4e8b\u4ef6\uff08\u6bd4\u5982\u70b9\u51fb\u4e8b\u4ef6\u3001\u5b9a\u65f6\u5668\u7b49\uff09\u88ab\u89e6\u53d1\u65f6\uff0c\u5b83\u4f1a\u88ab\u6dfb\u52a0\u5230\u4e8b\u4ef6\u961f\u5217\u4e2d\uff0c\u7b49\u5230\u5f53\u524d\u6267\u884c\u6808\u7a7a\u95f2\u65f6\u624d\u4f1a\u88ab\u5904\u7406\u3002<\/p>\n<\/p>\n<p><p><strong>\u975e\u963b\u585eI\/O\u6a21\u578b<\/strong>\u662fJavaScript\u7684\u4e00\u5927\u7279\u8272\uff0c\u4f7f\u5f97JavaScript\u7279\u522b\u9002\u5408\u5904\u7406\u5927\u91cf\u7684\u5e76\u53d1\u8bf7\u6c42\uff0c\u8fd9\u5728Node.js\u7684\u8bbe\u8ba1\u7406\u5ff5\u4e2d\u5f97\u5230\u4e86\u5f3a\u5316\u3002\u56e0\u6b64\uff0c\u4efb\u4f55\u5c1d\u8bd5\u5b9e\u73b0\u963b\u585e\u5f0f\u4ea4\u4e92\u7684\u65b9\u6cd5\u90fd\u6709\u8fddJavaScript\u7684\u8bbe\u8ba1\u521d\u8877\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u4f7f\u7528Promises\u6a21\u62df\u963b\u585e<\/h3>\n<\/p>\n<p><p><strong>Promises<\/strong>\u662f\u4e00\u79cd\u5f02\u6b65\u7f16\u7a0b\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u5728\u5904\u7406\u5f02\u6b65\u64cd\u4f5c\u4e0a\u66f4\u52a0\u7684\u7075\u6d3b\u3002\u5b83\u4ee3\u8868\u4e86\u4e00\u4e2a\u5c1a\u672a\u5b8c\u6210\u4f46\u9884\u671f\u4f1a\u5b8c\u6210\u7684\u64cd\u4f5c\u7684\u7ed3\u679c\uff0c\u63d0\u4f9b\u4e86<code>.then()<\/code>\u548c<code>.catch()<\/code>\u8fd9\u6837\u7684\u65b9\u6cd5\u6765\u5904\u7406\u6210\u529f\u548c\u5931\u8d25\u7684\u573a\u666f\uff0c\u8fd9\u6837\u4f7f\u5f97\u4ee3\u7801\u7684\u903b\u8f91\u66f4\u52a0\u6e05\u6670\u3002<\/p>\n<\/p>\n<p><p>\u5728\u6a21\u62df\u963b\u585e\u5f0fjAlert\u7684\u8fc7\u7a0b\u4e2d\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a<strong>\u8fd4\u56dePromise\u5bf9\u8c61\u7684\u81ea\u5b9a\u4e49\u51fd\u6570<\/strong>\u6765\u8981\u6c42\u7528\u6237\u5728\u5f39\u7a97\u88ab\u5173\u95ed\u4e4b\u524d\u4ee3\u7801\u4e0d\u7ee7\u7eed\u6267\u884c\u4e0b\u53bb\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u5b9e\u73b0\u81ea\u5b9a\u4e49\u963b\u585e\u5f0fjAlert<\/h3>\n<\/p>\n<p><p>\u4e3a\u4e86\u521b\u5efa\u4e00\u4e2a\u7c7b\u4f3c\u4e8e\u963b\u585e\u7684jAlert\uff0c\u4f60\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u663e\u793a\u4e00\u4e2a\u6a21\u6001\u5bf9\u8bdd\u6846\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2aPromise\u5bf9\u8c61\u3002Promise\u5bf9\u8c61\u5c06\u4f1a\u5728\u7528\u6237\u5173\u95ed\u4e86\u8fd9\u4e2a\u6a21\u6001\u5bf9\u8bdd\u6846\u4e4b\u540e\u89e3\u51b3\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">function customAlert(message) {<\/p>\n<p>  return new Promise((resolve, reject) =&gt; {<\/p>\n<p>    \/\/ \u663e\u793a\u4e00\u4e2a\u6a21\u6001\u5bf9\u8bdd\u6846<\/p>\n<p>    \/\/ \u6302\u8f7d\u786e\u8ba4\u6309\u94ae\u7684\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\uff0c\u5f53\u70b9\u51fb\u65f6\u89e3\u51b3Promise<\/p>\n<p>    const modal = \/\/ create your modal here<\/p>\n<p>    const confirmButton = \/\/ get the confirm button element<\/p>\n<p>    confirmButton.onclick = function() {<\/p>\n<p>      \/\/ \u5173\u95ed\u6a21\u6001\u5bf9\u8bdd\u6846<\/p>\n<p>      \/\/ ...<\/p>\n<p>      resolve(); \/\/ \u5f53\u7528\u6237\u70b9\u51fb\u786e\u8ba4\uff0c\u89e3\u51b3Promise<\/p>\n<p>    };<\/p>\n<p>    \/\/ \u6dfb\u52a0\u5904\u7406\u53d6\u6d88\u903b\u8f91\u7684\u4ee3\u7801\uff08\u5982\u679c\u9700\u8981\uff09<\/p>\n<p>    document.body.appendChild(modal);<\/p>\n<p>  });<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u56db\u3001\u4f7f\u7528async\/await\u8c03\u7528\u81ea\u5b9a\u4e49\u963b\u585e\u5f0fjAlert<\/h3>\n<\/p>\n<p><p>\u4e00\u65e6\u4f60\u521b\u5efa\u4e86\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684alert\u51fd\u6570\uff0c\u5b83\u8fd4\u56de\u4e00\u4e2aPromise\uff0c\u4f60\u5c31\u53ef\u4ee5\u5728\u5f02\u6b65\u51fd\u6570\u4e2d\u4f7f\u7528<code>await<\/code>\u5173\u952e\u5b57\u6765\u201c\u7b49\u5f85\u201d\u7528\u6237\u7684\u54cd\u5e94\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">async function showAlertAndWait() {<\/p>\n<p>  await customAlert(&quot;\u8fd9\u662f\u4e00\u4e2a\u963b\u585e\u5f0falert!&quot;);<\/p>\n<p>  console.log(&quot;alert\u5173\u95ed\u540e\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801&quot;);<\/p>\n<p>}<\/p>\n<p>showAlertAndWait();<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u7528<code>await<\/code>\u5173\u952e\u5b57\u8c03\u7528<code>customAlert<\/code>\u4f1a\u5bfc\u81f4<code>showAlertAndWait<\/code>\u51fd\u6570\u6267\u884c\u5230\u8fd9\u4e00\u70b9\u540e\u6682\u505c\u6267\u884c\uff0c\u76f4\u5230\u7528\u6237\u5173\u95ed\u4e86alert\u5bf9\u8bdd\u6846\u3002\u6267\u884c\u624d\u4f1a\u7ee7\u7eed\uff0c\u4e4b\u540e\u7684<code>console.log<\/code>\u624d\u4f1a\u8fd0\u884c\u3002<\/p>\n<\/p>\n<p><p>\u8bb0\u4f4f\uff0c\u5373\u4f7f\u8fd9\u79cd\u65b9\u6cd5\u6a21\u62df\u4e86\u963b\u585e\u5f0f\u884c\u4e3a\uff0cJavaScript\u7684\u8fd0\u884c\u73af\u5883\u8fd8\u662f\u7ee7\u7eed\u54cd\u5e94\u5176\u4ed6\u4e8b\u4ef6\uff0c\u5176\u5b83\u7684\u5f02\u6b65\u4e8b\u4ef6\u4f9d\u7136\u53ef\u4ee5\u5728\u80cc\u540e\u6267\u884c\u3002<\/p>\n<\/p>\n<p><h3>\u4e94\u3001\u603b\u7ed3<\/h3>\n<\/p>\n<p><p>\u867d\u7136\u4e0d\u80fd\u771f\u6b63\u5730\u5b9e\u73b0\u963b\u585e\u5f0f\u7684jAlert\uff0c\u4f46\u901a\u8fc7\u5f02\u6b65\u7f16\u7a0b\u6280\u5de7\uff0c\u53ef\u4ee5\u8fbe\u5230\u7c7b\u4f3c\u963b\u585e\u7b49\u5f85\u7528\u6237\u64cd\u4f5c\u7684\u6548\u679c\u3002\u8fd9\u79cd\u6a21\u62df\u5b9e\u73b0\u4e86\u7528\u6237\u754c\u9762\u7684\u4ea4\u4e92\u548c\u7a0b\u5e8f\u6d41\u7a0b\u63a7\u5236\uff0c\u800c\u4e0d\u4f1a\u9020\u6210\u6574\u4e2a\u7a0b\u5e8f\u6216\u8005\u9875\u9762\u7684\u51bb\u7ed3\u3002\u8fd9\u65e2\u4fdd\u6301\u4e86JavaScript\u7684\u975e\u963b\u585e\u7279\u6027\uff0c\u4e5f\u4e3a\u7a0b\u5e8f\u5458\u63d0\u4f9b\u4e86\u7f16\u5199\u7c7b\u4f3c\u4e8e\u540c\u6b65\u4ee3\u7801\u7684\u65b9\u5f0f\uff0c\u66f4\u4f18\u96c5\u5730\u5904\u7406\u7b49\u5f85\u7528\u6237\u8f93\u5165\u7684\u573a\u5408\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>\u5e38\u89c1\u95ee\u98981\uff1aJavaScript\u5982\u4f55\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u5f39\u7a97\u63d0\u793a\u6846\uff1f<\/strong><\/p>\n<p>JavaScript\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u5b9e\u73b0\u81ea\u5b9a\u4e49\u7684\u5f39\u7a97\u63d0\u793a\u6846\uff0c\u5176\u4e2d\u4e00\u79cd\u65b9\u5f0f\u662f\u4f7f\u7528\u6a21\u6001\u5bf9\u8bdd\u6846\u3002\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u5fc5\u8981\u6837\u5f0f\u548c\u4ea4\u4e92\u903b\u8f91\u7684HTML\u5143\u7d20\uff0c\u53ef\u4ee5\u5b9e\u73b0\u7c7b\u4f3c\u4e8ejAlert\u7684\u963b\u585e\u5f0f\u5f39\u7a97\u3002<\/p>\n<p><strong>\u5e38\u89c1\u95ee\u98982\uff1a\u5982\u4f55\u4f7f\u7528JavaScript\u5b9e\u73b0\u4e00\u4e2a\u963b\u585e\u5f0f\u7684\u63d0\u793a\u6846\uff1f<\/strong><\/p>\n<p>\u8981\u5b9e\u73b0\u4e00\u4e2a\u963b\u585e\u5f0f\u7684\u63d0\u793a\u6846\uff0c\u53ef\u4ee5\u4f7f\u7528JavaScript\u7684\u4e8b\u4ef6\u5faa\u73af\u673a\u5236\u548c\u56de\u8c03\u51fd\u6570\u6765\u5b9e\u73b0\u3002\u901a\u8fc7\u5728\u63d0\u793a\u6846\u663e\u793a\u671f\u95f4\u963b\u6b62\u7528\u6237\u4e0e\u9875\u9762\u7684\u4ea4\u4e92\uff0c\u5e76\u5728\u7528\u6237\u5173\u95ed\u63d0\u793a\u6846\u540e\u6267\u884c\u76f8\u5e94\u7684\u56de\u8c03\u51fd\u6570\uff0c\u53ef\u4ee5\u6a21\u62df\u51fa\u963b\u585e\u5f0f\u7684\u6548\u679c\u3002<\/p>\n<p><strong>\u5e38\u89c1\u95ee\u98983\uff1a\u6709\u6ca1\u6709\u5176\u4ed6\u7684\u66ff\u4ee3\u65b9\u6848\u6765\u5b9e\u73b0\u7c7b\u4f3cjAlert\u7684\u963b\u585e\u5f0f\u5f39\u7a97\uff1f<\/strong><\/p>\n<p>\u9664\u4e86\u4f7f\u7528JavaScript\u6765\u5b9e\u73b0\u963b\u585e\u5f0f\u5f39\u7a97\u5916\uff0c\u8fd8\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u5176\u4ed6\u524d\u7aef\u6846\u67b6\u6216\u5e93\u6765\u5b9e\u73b0\u7c7b\u4f3c\u7684\u6548\u679c\u3002\u4f8b\u5982\uff0c\u4f7f\u7528Vue.js\u6216React\u7b49\u6846\u67b6\u53ef\u4ee5\u66f4\u65b9\u4fbf\u5730\u7ba1\u7406\u548c\u63a7\u5236\u5f39\u7a97\u7684\u663e\u793a\u548c\u4ea4\u4e92\u6548\u679c\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u73b0\u6210\u7684\u5f39\u7a97\u7ec4\u4ef6\u5e93\uff0c\u5982Bootstrap\u3001Ant 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[&hellip;]","protected":false},"author":3,"featured_media":166513,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/166508"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=166508"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/166508\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/166513"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=166508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=166508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=166508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}