{"id":2153,"date":"2025-03-01T00:21:09","date_gmt":"2025-02-28T16:21:09","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2153"},"modified":"2025-03-01T00:21:09","modified_gmt":"2025-02-28T16:21:09","slug":"javascript-%e8%ae%a1%e6%97%b6%e4%ba%8b%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/01\/javascript-%e8%ae%a1%e6%97%b6%e4%ba%8b%e4%bb%b6\/","title":{"rendered":"JavaScript \u8ba1\u65f6\u4e8b\u4ef6"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">JavaScript \u63d0\u4f9b\u4e86\u4e24\u79cd\u5e38\u7528\u7684\u8ba1\u65f6\u529f\u80fd\uff1a<code>setTimeout()<\/code> \u548c <code>setInterval()<\/code>\u3002\u5b83\u4eec\u53ef\u4ee5\u5728\u6307\u5b9a\u7684\u5ef6\u8fdf\u540e\u6267\u884c\u4ee3\u7801\uff0c\u6216\u8005\u6309\u56fa\u5b9a\u65f6\u95f4\u95f4\u9694\u53cd\u590d\u6267\u884c\u4ee3\u7801\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u65b9\u6cd5\u6765\u5b9e\u73b0\u5ef6\u65f6\u6267\u884c\u3001\u5468\u671f\u6027\u6267\u884c\u7b49\u529f\u80fd\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong><code>setTimeout()<\/code> \u65b9\u6cd5<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>setTimeout()<\/code> \u65b9\u6cd5\u7528\u4e8e\u5728\u6307\u5b9a\u7684\u5ef6\u8fdf\u65f6\u95f4\uff08\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d\uff09\u540e\u6267\u884c\u4e00\u4e2a\u51fd\u6570\u4e00\u6b21\u3002\u5b83\u662f\u6267\u884c\u5ef6\u65f6\u64cd\u4f5c\u7684\u57fa\u672c\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8bed\u6cd5\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let timeoutID = setTimeout(function, delay);<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>function<\/code>\uff1a\u8981\u6267\u884c\u7684\u56de\u8c03\u51fd\u6570\u3002<\/li>\n\n\n\n<li><code>delay<\/code>\uff1a\u5ef6\u8fdf\u6267\u884c\u7684\u65f6\u95f4\uff0c\u5355\u4f4d\u662f\u6beb\u79d2\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>setTimeout(function() {\n  console.log(\"This message is displayed after 2 seconds.\");\n}, 2000);  \/\/ 2000 \u6beb\u79d2 = 2 \u79d2<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6548\u679c\uff1a<\/strong><br>\u5728 2 \u79d2\u540e\uff0c\u63a7\u5236\u53f0\u6253\u5370\u51fa &#8220;This message is displayed after 2 seconds.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8fd4\u56de\u503c\uff1a<\/strong><br><code>setTimeout()<\/code> \u8fd4\u56de\u4e00\u4e2a\u552f\u4e00\u7684 ID\uff08timeoutID\uff09\uff0c\u53ef\u4ee5\u7528\u6765\u53d6\u6d88\u5b9a\u65f6\u5668\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u53d6\u6d88 <code>setTimeout()<\/code> \u5b9a\u65f6\u5668\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let timeoutID = setTimeout(function() {\n  console.log(\"This message won't be displayed.\");\n}, 2000);\n\nclearTimeout(timeoutID);  \/\/ \u5728 2 \u79d2\u4e4b\u524d\u53d6\u6d88\u5b9a\u65f6\u5668<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong><code>setInterval()<\/code> \u65b9\u6cd5<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>setInterval()<\/code> \u65b9\u6cd5\u7528\u4e8e\u6bcf\u9694\u6307\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\uff08\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d\uff09\u53cd\u590d\u6267\u884c\u4e00\u4e2a\u51fd\u6570\uff0c\u76f4\u5230\u660e\u786e\u505c\u6b62\u5b83\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8bed\u6cd5\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let intervalID = setInterval(function, interval);<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>function<\/code>\uff1a\u8981\u6267\u884c\u7684\u56de\u8c03\u51fd\u6570\u3002<\/li>\n\n\n\n<li><code>interval<\/code>\uff1a\u65f6\u95f4\u95f4\u9694\uff0c\u5355\u4f4d\u662f\u6beb\u79d2\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let counter = 0;\n\nlet intervalID = setInterval(function() {\n  console.log(\"This message is displayed every 2 seconds.\");\n  counter++;\n\n  if (counter &gt;= 5) {\n    clearInterval(intervalID);  \/\/ \u505c\u6b62\u5b9a\u65f6\u5668\n    console.log(\"Interval stopped.\");\n  }\n}, 2000);  \/\/ \u6bcf 2 \u79d2\u6267\u884c\u4e00\u6b21<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6548\u679c\uff1a<\/strong><br>\u6bcf 2 \u79d2\u8f93\u51fa\u4e00\u6b21 &#8220;This message is displayed every 2 seconds.&#8221;\uff0c\u76f4\u5230\u6267\u884c 5 \u6b21\u540e\uff0c\u8f93\u51fa &#8220;Interval stopped.&#8221; \u5e76\u505c\u6b62\u5b9a\u65f6\u5668\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8fd4\u56de\u503c\uff1a<\/strong><br><code>setInterval()<\/code> \u8fd4\u56de\u4e00\u4e2a\u552f\u4e00\u7684 ID\uff08intervalID\uff09\uff0c\u53ef\u4ee5\u7528\u6765\u53d6\u6d88\u5b9a\u65f6\u5668\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u53d6\u6d88 <code>setInterval()<\/code> \u5b9a\u65f6\u5668\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let intervalID = setInterval(function() {\n  console.log(\"This message won't be displayed.\");\n}, 2000);\n\nclearInterval(intervalID);  \/\/ \u7acb\u5373\u53d6\u6d88\u5b9a\u65f6\u5668<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. <strong><code>setTimeout()<\/code> \u4e0e <code>setInterval()<\/code> \u7684\u6bd4\u8f83<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>setTimeout()<\/code><\/strong>\uff1a\u7528\u4e8e\u6267\u884c\u4e00\u6b21\u6027\u7684\u5ef6\u65f6\u64cd\u4f5c\u3002<\/li>\n\n\n\n<li><strong><code>setInterval()<\/code><\/strong>\uff1a\u7528\u4e8e\u6309\u56fa\u5b9a\u65f6\u95f4\u95f4\u9694\u6267\u884c\u591a\u6b21\u64cd\u4f5c\uff0c\u76f4\u5230\u660e\u786e\u53d6\u6d88\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. <strong><code>setTimeout()<\/code> \u4e0e <code>setInterval()<\/code> \u7684\u5d4c\u5957<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f60\u53ef\u4ee5\u5c06 <code>setTimeout()<\/code> \u5d4c\u5957\u5728 <code>setInterval()<\/code> \u4e2d\uff0c\u6216\u8005\u53cd\u4e4b\uff0c\u6839\u636e\u5177\u4f53\u9700\u6c42\u6267\u884c\u66f4\u590d\u6742\u7684\u8ba1\u65f6\u903b\u8f91\u3002\u4f8b\u5982\uff0c\u5229\u7528 <code>setTimeout()<\/code> \u6a21\u62df\u7c7b\u4f3c\u4e8e <code>setInterval()<\/code> \u7684\u5468\u671f\u6027\u4efb\u52a1\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let counter = 0;\n\nfunction repeatTask() {\n  console.log(\"This message is displayed every 2 seconds.\");\n  counter++;\n\n  if (counter &lt; 5) {\n    setTimeout(repeatTask, 2000);  \/\/ \u9012\u5f52\u8c03\u7528\u5b9e\u73b0\u5468\u671f\u6027\u4efb\u52a1\n  } else {\n    console.log(\"Task completed.\");\n  }\n}\n\nsetTimeout(repeatTask, 2000);  \/\/ \u9996\u6b21\u5ef6\u8fdf 2 \u79d2<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">5. <strong><code>performance.now()<\/code> \u7528\u4e8e\u7cbe\u786e\u8ba1\u65f6<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f60\u9700\u8981\u66f4\u9ad8\u7cbe\u5ea6\u7684\u65f6\u95f4\u8ba1\u7b97\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>performance.now()<\/code> \u65b9\u6cd5\u3002\u5b83\u8fd4\u56de\u81ea\u6d4f\u89c8\u5668\u542f\u52a8\u4ee5\u6765\u7684\u65f6\u95f4\uff08\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d\uff09\uff0c\u5e76\u4e14\u7cbe\u5ea6\u9ad8\u4e8e <code>Date.now()<\/code>\uff0c\u901a\u5e38\u7528\u4e8e\u6d4b\u91cf\u4ee3\u7801\u6267\u884c\u65f6\u95f4\u6216\u4f18\u5316\u6027\u80fd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let startTime = performance.now();\n\nsetTimeout(function() {\n  let endTime = performance.now();\n  console.log(\"The operation took \" + (endTime - startTime) + \" milliseconds.\");\n}, 2000);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6548\u679c\uff1a<\/strong><br>\u5728 2 \u79d2\u540e\u8f93\u51fa\u64cd\u4f5c\u7684\u6267\u884c\u65f6\u95f4\uff0c\u7cbe\u786e\u5230\u5c0f\u6570\u70b9\u540e\u51e0\u4f4d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. <strong>\u5e38\u89c1\u5e94\u7528\u573a\u666f<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5ef6\u65f6\u6267\u884c<\/strong>\uff1a\u4f7f\u7528 <code>setTimeout()<\/code> \u5ef6\u8fdf\u6267\u884c\u67d0\u4e2a\u64cd\u4f5c\u3002<\/li>\n\n\n\n<li><strong>\u5468\u671f\u6027\u6267\u884c<\/strong>\uff1a\u4f7f\u7528 <code>setInterval()<\/code> \u5b9a\u671f\u6267\u884c\u67d0\u4e9b\u4efb\u52a1\uff0c\u5982\u8f6e\u8be2\u3001\u52a8\u753b\u3001\u8ba1\u65f6\u5668\u7b49\u3002<\/li>\n\n\n\n<li><strong>\u52a8\u6001\u5185\u5bb9\u66f4\u65b0<\/strong>\uff1a\u4f8b\u5982\uff0c\u521b\u5efa\u4e00\u4e2a\u81ea\u52a8\u8f6e\u64ad\u7684\u56fe\u50cf\u6216\u6587\u7ae0\u3002<\/li>\n\n\n\n<li><strong>\u9010\u6b65\u52a8\u753b<\/strong>\uff1a\u901a\u8fc7\u9012\u5f52\u8c03\u7528 <code>setTimeout()<\/code> \u6765\u5b9e\u73b0\u9010\u6b65\u52a8\u753b\u6548\u679c\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">7. <strong>\u603b\u7ed3<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>setTimeout()<\/code><\/strong>\uff1a\u7528\u4e8e\u5ef6\u8fdf\u4e00\u6b21\u6027\u6267\u884c\u3002<\/li>\n\n\n\n<li><strong><code>setInterval()<\/code><\/strong>\uff1a\u7528\u4e8e\u91cd\u590d\u6267\u884c\u67d0\u4e2a\u4efb\u52a1\uff0c\u76f4\u5230\u8c03\u7528 <code>clearInterval()<\/code> \u505c\u6b62\u3002<\/li>\n\n\n\n<li><strong>\u53d6\u6d88\u8ba1\u65f6\u5668<\/strong>\uff1a<code>clearTimeout()<\/code> \u548c <code>clearInterval()<\/code> \u7528\u4e8e\u53d6\u6d88\u76f8\u5e94\u7684\u8ba1\u65f6\u5668\u3002<\/li>\n\n\n\n<li><strong>\u6027\u80fd\u4f18\u5316<\/strong>\uff1a<code>performance.now()<\/code> \u63d0\u4f9b\u66f4\u9ad8\u7cbe\u5ea6\u7684\u8ba1\u65f6\u529f\u80fd\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ba1\u65f6\u4e8b\u4ef6\u662f JavaScript \u4e2d\u975e\u5e38\u91cd\u8981\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5b9e\u73b0\u8bb8\u591a\u52a8\u6001\u4ea4\u4e92\u3001\u52a8\u753b\u548c\u5468\u671f\u6027\u4efb\u52a1\u3002\u638c\u63e1\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u80fd\u591f\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u63a7\u5236\u65f6\u95f4\u548c\u5ef6\u8fdf\uff0c\u63d0\u4f9b\u66f4\u4e30\u5bcc\u7684\u7528\u6237\u4f53\u9a8c\u3002\u66f4\u591a\u5176\u4ed6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript \u63d0\u4f9b\u4e86\u4e24\u79cd\u5e38\u7528\u7684\u8ba1\u65f6\u529f\u80fd\uff1asetTimeout() \u548c setInterval()\u3002\u5b83\u4eec [&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-2153","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2153","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=2153"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2153\/revisions"}],"predecessor-version":[{"id":2154,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2153\/revisions\/2154"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}