{"id":1404,"date":"2025-02-08T00:17:11","date_gmt":"2025-02-07T16:17:11","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=1404"},"modified":"2025-02-08T00:22:58","modified_gmt":"2025-02-07T16:22:58","slug":"javascript-%e5%9c%a8%e6%b5%8f%e8%a7%88%e5%99%a8%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8%ef%bc%9adom-%e6%93%8d%e4%bd%9c%e3%80%81%e4%ba%8b%e4%bb%b6%e5%a4%84%e7%90%86%e4%b8%8e-ajax-%e8%af%b7%e6%b1%82","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/02\/08\/javascript-%e5%9c%a8%e6%b5%8f%e8%a7%88%e5%99%a8%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8%ef%bc%9adom-%e6%93%8d%e4%bd%9c%e3%80%81%e4%ba%8b%e4%bb%b6%e5%a4%84%e7%90%86%e4%b8%8e-ajax-%e8%af%b7%e6%b1%82\/","title":{"rendered":"JavaScript \u5728\u6d4f\u89c8\u5668\u4e2d\u7684\u5e94\u7528\uff1aDOM \u64cd\u4f5c\u3001\u4e8b\u4ef6\u5904\u7406\u4e0e Ajax \u8bf7\u6c42"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">JavaScript \u5728\u6d4f\u89c8\u5668\u4e2d\u7684\u5e94\u7528\u662f\u524d\u7aef\u5f00\u53d1\u7684\u6838\u5fc3\uff0c\u6db5\u76d6\u4e86\u5bf9\u7f51\u9875\u5143\u7d20\u7684\u64cd\u4f5c\u3001\u6d4f\u89c8\u5668\u7279\u6027\u3001\u5f02\u6b65\u8bf7\u6c42\u7b49\u591a\u4e2a\u65b9\u9762\u3002\u4ee5\u4e0b\u662f\u5173\u4e8e\u6d4f\u89c8\u5668\u5bf9\u8c61\u6a21\u578b\uff08BOM\uff09\u3001DOM \u64cd\u4f5c\u3001\u4e8b\u4ef6\u5904\u7406\u548c\u5f02\u6b65\u8bf7\u6c42\u7684\u6df1\u5165\u89e3\u6790\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">1. <strong>\u6d4f\u89c8\u5668 BOM\uff08\u6d4f\u89c8\u5668\u5bf9\u8c61\u6a21\u578b\uff09<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">BOM \u63d0\u4f9b\u4e86 JavaScript \u4e0e\u6d4f\u89c8\u5668\u73af\u5883\u4ea4\u4e92\u7684\u63a5\u53e3\uff0c\u5141\u8bb8\u4f60\u8bbf\u95ee\u548c\u64cd\u4f5c\u6d4f\u89c8\u5668\u7684\u5404\u4e2a\u7ec4\u4ef6\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><code>window<\/code> \u5bf9\u8c61<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>window<\/code><\/strong> \u662f\u6d4f\u89c8\u5668\u7684\u5168\u5c40\u5bf9\u8c61\uff0c\u6240\u6709\u5728\u6d4f\u89c8\u5668\u4e2d\u7684 JavaScript \u90fd\u662f\u57fa\u4e8e <code>window<\/code> \u7684\u3002\u5b83\u4ee3\u8868\u4e86\u6d4f\u89c8\u5668\u7a97\u53e3\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>console.log(window.innerWidth);  \/\/ \u6d4f\u89c8\u5668\u7a97\u53e3\u7684\u5bbd\u5ea6\nconsole.log(window.location.href);  \/\/ \u5f53\u524d URL<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\"><code>document<\/code> \u5bf9\u8c61<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>document<\/code><\/strong> \u7528\u6765\u8bbf\u95ee\u548c\u64cd\u4f5c\u5f53\u524d\u52a0\u8f7d\u7684 HTML \u6587\u6863\uff0c\u5e38\u7528\u4e8e DOM \u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>console.log(document.title);  \/\/ \u83b7\u53d6\u9875\u9762\u6807\u9898<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\"><code>navigator<\/code> \u5bf9\u8c61<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>navigator<\/code><\/strong> \u63d0\u4f9b\u4e86\u6d4f\u89c8\u5668\u7684\u4fe1\u606f\uff0c\u6bd4\u5982\u7528\u6237\u4ee3\u7406\u3001\u8bed\u8a00\u3001\u5e73\u53f0\u7b49\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>console.log(navigator.userAgent);  \/\/ \u83b7\u53d6\u7528\u6237\u4ee3\u7406\u5b57\u7b26\u4e32<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\"><code>location<\/code> \u5bf9\u8c61<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>location<\/code><\/strong> \u63d0\u4f9b\u4e86\u5173\u4e8e\u5f53\u524d URL \u7684\u4fe1\u606f\uff0c\u5e76\u4e14\u53ef\u4ee5\u7528\u6765\u4fee\u6539\u6d4f\u89c8\u5668\u7684 URL\uff0c\u89e6\u53d1\u9875\u9762\u5bfc\u822a\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>console.log(location.href);  \/\/ \u83b7\u53d6\u5f53\u524d URL\nlocation.href = \"https:\/\/www.example.com\";  \/\/ \u5bfc\u822a\u5230\u53e6\u4e00\u4e2a\u9875\u9762<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\"><code>screen<\/code> \u5bf9\u8c61<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>screen<\/code><\/strong> \u63d0\u4f9b\u4e86\u6709\u5173\u5c4f\u5e55\u7684\u5c5e\u6027\uff0c\u5e2e\u52a9\u4f60\u83b7\u53d6\u5c4f\u5e55\u7684\u5c3a\u5bf8\u7b49\u4fe1\u606f\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>console.log(screen.width);  \/\/ \u83b7\u53d6\u5c4f\u5e55\u7684\u5bbd\u5ea6\nconsole.log(screen.height); \/\/ \u83b7\u53d6\u5c4f\u5e55\u7684\u9ad8\u5ea6<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">2. <strong>\u6d4f\u89c8\u5668\u5b58\u50a8\uff08localStorage \u548c sessionStorage\uff09<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u6d4f\u89c8\u5668\u5b58\u50a8\u53ef\u4ee5\u8ba9\u4f60\u5728\u6d4f\u89c8\u5668\u4e2d\u5b58\u50a8\u6570\u636e\uff0c\u4e14\u4e0d\u4f1a\u968f\u7740\u9875\u9762\u7684\u5237\u65b0\u800c\u4e22\u5931\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><code>localStorage<\/code><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>localStorage<\/code> \u63d0\u4f9b\u4e86\u4e00\u4e2a\u6301\u4e45\u5316\u5b58\u50a8\u7a7a\u95f4\uff0c\u5b58\u50a8\u7684\u6570\u636e\u5728\u6d4f\u89c8\u5668\u5173\u95ed\u540e\u4f9d\u7136\u5b58\u5728\uff0c\u76f4\u5230\u624b\u52a8\u5220\u9664\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5b58\u50a8\u6570\u636e\nlocalStorage.setItem('username', 'Alice');\n\n\/\/ \u83b7\u53d6\u6570\u636e\nconsole.log(localStorage.getItem('username'));  \/\/ \u8f93\u51fa: Alice\n\n\/\/ \u5220\u9664\u6570\u636e\nlocalStorage.removeItem('username');<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\"><code>sessionStorage<\/code><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>sessionStorage<\/code> \u662f\u4e34\u65f6\u5b58\u50a8\uff0c\u6570\u636e\u53ea\u4f1a\u5728\u5f53\u524d\u4f1a\u8bdd\uff08\u6d4f\u89c8\u5668\u7a97\u53e3\uff09\u671f\u95f4\u5b58\u5728\uff0c\u7a97\u53e3\u5173\u95ed\u540e\u6570\u636e\u5c31\u4f1a\u88ab\u6e05\u9664\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5b58\u50a8\u6570\u636e\nsessionStorage.setItem('sessionID', '12345');\n\n\/\/ \u83b7\u53d6\u6570\u636e\nconsole.log(sessionStorage.getItem('sessionID'));  \/\/ \u8f93\u51fa: 12345<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">3. <strong>\u5b9a\u65f6\u5668\uff08<code>setTimeout()<\/code>\u3001<code>setInterval()<\/code>\uff09<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9a\u65f6\u5668\u53ef\u4ee5\u7528\u6765\u5ef6\u8fdf\u6216\u5468\u671f\u6027\u6267\u884c\u4ee3\u7801\uff0c\u5e38\u7528\u4e8e\u52a8\u753b\u3001\u8f6e\u64ad\u56fe\u7b49\u573a\u666f\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><code>setTimeout()<\/code><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>setTimeout()<\/code> \u7528\u6765\u5ef6\u8fdf\u6267\u884c\u4e00\u6bb5\u4ee3\u7801\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>setTimeout(() =&gt; {\n  console.log(\"This message appears after 2 seconds\");\n}, 2000);<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\"><code>setInterval()<\/code><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>setInterval()<\/code> \u7528\u6765\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u91cd\u590d\u6267\u884c\u4e00\u6bb5\u4ee3\u7801\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>setInterval(() =&gt; {\n  console.log(\"This message repeats every 1 second\");\n}, 1000);<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6e05\u9664\u5b9a\u65f6\u5668<\/strong>\uff1a\u53ef\u4ee5\u4f7f\u7528 <code>clearTimeout()<\/code> \u548c <code>clearInterval()<\/code> \u6765\u6e05\u9664\u5b9a\u65f6\u5668\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const timeoutId = setTimeout(() =&gt; {\n  console.log(\"This won't be displayed\");\n}, 2000);\nclearTimeout(timeoutId);  \/\/ \u6e05\u9664\u5b9a\u65f6\u5668<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">4. <strong>DOM \u64cd\u4f5c<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">DOM\uff08\u6587\u6863\u5bf9\u8c61\u6a21\u578b\uff09\u662f JavaScript \u7528\u6765\u64cd\u4f5c HTML \u548c XML \u6587\u6863\u7684\u63a5\u53e3\uff0c\u901a\u8fc7 DOM \u53ef\u4ee5\u8bbf\u95ee\u548c\u64cd\u4f5c\u9875\u9762\u4e0a\u7684\u5143\u7d20\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u83b7\u53d6\u5143\u7d20<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>getElementById()<\/code><\/strong>\uff1a\u901a\u8fc7 ID \u83b7\u53d6\u5355\u4e2a\u5143\u7d20\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const element = document.getElementById(\"myElement\");<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>getElementsByClassName()<\/code><\/strong>\uff1a\u901a\u8fc7\u7c7b\u540d\u83b7\u53d6\u5143\u7d20\u96c6\u5408\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const elements = document.getElementsByClassName(\"myClass\");<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>querySelector()<\/code><\/strong>\uff1a\u901a\u8fc7 CSS \u9009\u62e9\u5668\u83b7\u53d6\u5355\u4e2a\u5143\u7d20\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const element = document.querySelector(\".myClass\");<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">\u4fee\u6539\u5143\u7d20<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>innerHTML<\/code><\/strong>\uff1a\u4fee\u6539\u5143\u7d20\u7684 HTML \u5185\u5bb9\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>document.getElementById(\"myElement\").innerHTML = \"&lt;p&gt;New content&lt;\/p&gt;\";<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>textContent<\/code><\/strong>\uff1a\u4fee\u6539\u5143\u7d20\u7684\u6587\u672c\u5185\u5bb9\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>document.getElementById(\"myElement\").textContent = \"New text\";<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>style<\/code><\/strong>\uff1a\u4fee\u6539\u5143\u7d20\u7684\u6837\u5f0f\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>document.getElementById(\"myElement\").style.color = \"blue\";<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">\u64cd\u4f5c\u8282\u70b9<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6dfb\u52a0\u8282\u70b9<\/strong>\uff1a\u4f7f\u7528 <code>appendChild()<\/code> \u5411\u7236\u8282\u70b9\u6dfb\u52a0\u5b50\u8282\u70b9\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const newDiv = document.createElement(\"div\");\ndocument.body.appendChild(newDiv);<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5220\u9664\u8282\u70b9<\/strong>\uff1a\u4f7f\u7528 <code>removeChild()<\/code> \u5220\u9664\u6307\u5b9a\u8282\u70b9\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const element = document.getElementById(\"myElement\");\nelement.parentNode.removeChild(element);<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u63d2\u5165\u8282\u70b9<\/strong>\uff1a\u4f7f\u7528 <code>insertBefore()<\/code> \u5728\u6307\u5b9a\u4f4d\u7f6e\u63d2\u5165\u8282\u70b9\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const newDiv = document.createElement(\"div\");\ndocument.body.insertBefore(newDiv, document.body.firstChild);<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u514b\u9686\u8282\u70b9<\/strong>\uff1a\u4f7f\u7528 <code>cloneNode()<\/code> \u514b\u9686\u8282\u70b9\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const original = document.getElementById(\"myElement\");\nconst clone = original.cloneNode(true);  \/\/ `true` \u8868\u793a\u6df1\u5ea6\u514b\u9686\ndocument.body.appendChild(clone);<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">5. <strong>\u4e8b\u4ef6\u5904\u7406<\/strong><\/h4>\n\n\n\n<h5 class=\"wp-block-heading\">\u4e8b\u4ef6\u7c7b\u578b<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript \u652f\u6301\u591a\u79cd\u4e8b\u4ef6\u7c7b\u578b\uff0c\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u9f20\u6807\u4e8b\u4ef6<\/strong>\uff1a\u5982 <code>click<\/code>\u3001<code>mouseover<\/code>\u3001<code>mouseout<\/code>\u3001<code>mousemove<\/code> \u7b49\u3002<\/li>\n\n\n\n<li><strong>\u952e\u76d8\u4e8b\u4ef6<\/strong>\uff1a\u5982 <code>keydown<\/code>\u3001<code>keyup<\/code>\u3001<code>keypress<\/code>\u3002<\/li>\n\n\n\n<li><strong>\u8868\u5355\u4e8b\u4ef6<\/strong>\uff1a\u5982 <code>submit<\/code>\u3001<code>input<\/code>\u3001<code>change<\/code> \u7b49\u3002<\/li>\n<\/ul>\n\n\n\n<h5 class=\"wp-block-heading\">\u4e8b\u4ef6\u59d4\u6258<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e8b\u4ef6\u59d4\u6258\u662f\u4e00\u79cd\u901a\u8fc7\u5c06\u4e8b\u4ef6\u76d1\u542c\u5668\u9644\u52a0\u5230\u7236\u5143\u7d20\u4e0a\uff0c\u4ece\u800c\u7ba1\u7406\u591a\u4e2a\u5b50\u5143\u7d20\u7684\u4e8b\u4ef6\u7684\u65b9\u6cd5\u3002\u8fd9\u5bf9\u4e8e\u52a8\u6001\u6dfb\u52a0\u7684\u5143\u7d20\u5c24\u5176\u6709\u7528\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>document.getElementById(\"parent\").addEventListener(\"click\", function(event) {\n  if (event.target &amp;&amp; event.target.matches(\"button.classname\")) {\n    console.log(\"Button clicked!\");\n  }\n});<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">\u9632\u6b62\u4e8b\u4ef6\u7684\u9ed8\u8ba4\u884c\u4e3a\u4e0e\u4e8b\u4ef6\u4f20\u64ad<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>preventDefault()<\/code><\/strong>\uff1a\u963b\u6b62\u4e8b\u4ef6\u7684\u9ed8\u8ba4\u884c\u4e3a\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>document.getElementById(\"form\").addEventListener(\"submit\", function(event) {\n  event.preventDefault();  \/\/ \u963b\u6b62\u8868\u5355\u63d0\u4ea4\n  console.log(\"Form submission prevented\");\n});<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>stopPropagation()<\/code><\/strong>\uff1a\u963b\u6b62\u4e8b\u4ef6\u7ee7\u7eed\u4f20\u64ad\u5230\u7236\u5143\u7d20\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>document.getElementById(\"button\").addEventListener(\"click\", function(event) {\n  event.stopPropagation();  \/\/ \u963b\u6b62\u4e8b\u4ef6\u5192\u6ce1\n  console.log(\"Button clicked\");\n});<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">6. <strong>Ajax \u548c Fetch<\/strong><\/h4>\n\n\n\n<h5 class=\"wp-block-heading\">\u5f02\u6b65\u6570\u636e\u8bf7\u6c42\uff08<code>XMLHttpRequest<\/code>\uff09<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>XMLHttpRequest<\/code><\/strong> \u662f\u4e00\u79cd\u4f20\u7edf\u7684\u53d1\u9001\u5f02\u6b65\u8bf7\u6c42\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u7528\u6765\u4e0e\u670d\u52a1\u5668\u4ea4\u6362\u6570\u636e\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const xhr = new XMLHttpRequest();\nxhr.open(\"GET\", \"https:\/\/api.example.com\/data\", true);\nxhr.onload = function() {\n  if (xhr.status === 200) {\n    console.log(xhr.responseText);  \/\/ \u5904\u7406\u8fd4\u56de\u7684\u6570\u636e\n  }\n};\nxhr.send();<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">\u4f7f\u7528 <code>fetch()<\/code> \u8fdb\u884c\u6570\u636e\u8bf7\u6c42<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>fetch()<\/code><\/strong> \u662f\u4e00\u79cd\u73b0\u4ee3\u7684\u3001\u66f4\u7b80\u6d01\u7684\u5f02\u6b65\u8bf7\u6c42\u65b9\u5f0f\uff0c\u57fa\u4e8e Promise\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>fetch(\"https:\/\/api.example.com\/data\")\n  .then(response =&gt; response.json())  \/\/ \u89e3\u6790 JSON \u54cd\u5e94\n  .then(data =&gt; console.log(data))  \/\/ \u5904\u7406\u6570\u636e\n  .catch(error =&gt; console.error(\"Error:\", error));<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">\u5f02\u6b65\u7f16\u7a0b\u5728\u8bf7\u6c42\u4e2d\u7684\u5e94\u7528\uff08<code>Promise<\/code>\uff09<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><code>fetch()<\/code> \u4e0e <code>Promise<\/code> \u76f8\u7ed3\u5408\uff0c\u4f7f\u5f97\u5f02\u6b65\u8bf7\u6c42\u7684\u5904\u7406\u66f4\u52a0\u7b80\u6d01\u548c\u6e05\u6670\uff0c\u80fd\u591f\u907f\u514d\u56de\u8c03\u5730\u72f1\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>function getData() {\n  return fetch(\"https:\/\/api.example.com\/data\")\n    .then(response =&gt; response.json())\n    .then(data =&gt; data)\n    .catch(error =&gt; console.error(\"Error:\", error));\n}\n\ngetData().then(data =&gt; console.log(data));<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u5c0f\u7ed3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u672c\u7ae0\u8282\u7684\u5b66\u4e60\uff0c\u4f60\u5df2\u7ecf\u638c\u63e1\u4e86\u6d4f\u89c8\u5668\u73af\u5883\u4e2d\u7684\u4e00\u4e9b\u6838\u5fc3\u7279\u6027\uff0c\u5305\u62ec\u6d4f\u89c8\u5668\u5bf9\u8c61\u6a21\u578b\uff08BOM\uff09\u3001DOM \u64cd\u4f5c\u3001\u4e8b\u4ef6\u5904\u7406\u4e0e\u5f02\u6b65\u6570\u636e\u8bf7\u6c42\u3002\u638c\u63e1\u8fd9\u4e9b\u6280\u672f\u5c06\u5e2e\u52a9\u4f60\u66f4\u9ad8\u6548\u5730\u5f00\u53d1\u548c\u8c03\u8bd5\u524d\u7aef\u5e94\u7528\uff0c\u63d0\u5347\u5f00\u53d1\u6548\u7387\u548c\u4ee3\u7801\u8d28\u91cf\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u8fd9\u4e9b\u77e5\u8bc6\u5c06\u6781\u5927\u5730\u63d0\u5347\u4f60\u5904\u7406\u7528\u6237\u4ea4\u4e92\u3001\u5f02\u6b65\u4efb\u52a1\u3001\u6570\u636e\u8bf7\u6c42\u7b49\u65b9\u9762\u7684\u80fd\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript \u5728\u6d4f\u89c8\u5668\u4e2d\u7684\u5e94\u7528\u662f\u524d\u7aef\u5f00\u53d1\u7684\u6838\u5fc3\uff0c\u6db5\u76d6\u4e86\u5bf9\u7f51\u9875\u5143\u7d20\u7684\u64cd\u4f5c\u3001\u6d4f\u89c8\u5668\u7279\u6027\u3001\u5f02\u6b65\u8bf7\u6c42\u7b49\u591a\u4e2a\u65b9\u9762 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-1404","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1404","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=1404"}],"version-history":[{"count":2,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1404\/revisions"}],"predecessor-version":[{"id":1419,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/1404\/revisions\/1419"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=1404"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=1404"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=1404"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}