{"id":157389,"date":"2024-05-08T12:30:38","date_gmt":"2024-05-08T04:30:38","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/157389.html"},"modified":"2024-05-08T12:30:43","modified_gmt":"2024-05-08T04:30:43","slug":"%e4%bb%80%e4%b9%88%e6%98%af-javascript-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/157389.html","title":{"rendered":"\u4ec0\u4e48\u662f  JavaScript"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26215815\/2219cc4f-5be0-4409-9b42-ee48cab7c7a9.webp\" alt=\"\u4ec0\u4e48\u662f  JavaScript\" \/><\/p>\n<p><p>JavaScript\u662f\u4e00\u79cd<strong>\u8f7b\u91cf\u7ea7\u3001\u89e3\u91ca\u578b\u6216\u5373\u65f6\u7f16\u8bd1\u578b\u7684\u7f16\u7a0b\u8bed\u8a00<\/strong>\u3002\u5b83\u901a\u5e38\u7528\u4e8e\u7f51\u9875\u5f00\u53d1\uff0c\u4ee5\u5b9e\u73b0\u5ba2\u6237\u7aef\u811a\u672c\u6765\u8ba9\u7f51\u9875\u5728\u7528\u6237\u7684\u6d4f\u89c8\u5668\u7aef\u8868\u73b0\u51fa\u66f4\u4e3a\u52a8\u6001\u7684\u4ea4\u4e92\u6548\u679c\u3002JavaScript\u80fd\u591f\u88ab\u6240\u6709\u73b0\u4ee3\u7f51\u9875\u6d4f\u89c8\u5668\u652f\u6301\uff0c\u800c\u65e0\u9700\u5bf9\u6d4f\u89c8\u5668\u8fdb\u884c\u4efb\u4f55\u8bbe\u7f6e\u3002\u4f5c\u4e3a\u4e00\u79cd\u591a\u8303\u5f0f\u7684\u8bed\u8a00\uff0c\u5b83\u652f\u6301\u4e8b\u4ef6\u9a71\u52a8\u3001\u51fd\u6570\u5f0f\u7f16\u7a0b\u4ee5\u53ca\u5305\u542b\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u7279\u6027\u3002<strong>JavaScript\u5e76\u4e0d\u4ec5\u9650\u4e8e\u6d4f\u89c8\u5668\uff0c\u5b83\u4e5f\u80fd\u5728\u670d\u52a1\u5668\u7aef\u8fd0\u884c\uff0c\u6bd4\u5982\u4f7f\u7528Node.js\u73af\u5883<\/strong>\u3002\u5176\u4e2d\uff0c\u4e8b\u4ef6\u9a71\u52a8\u6a21\u578b\u662fJavaScript\u7684\u4e00\u4e2a\u6838\u5fc3\u7279\u6027\uff0c\u53ef\u6781\u5927\u5730\u589e\u5f3a\u7528\u6237\u754c\u9762\u7684\u54cd\u5e94\u6027\u548c\u4ea4\u4e92\u6027\u3002<\/p>\n<\/p>\n<p><p>\u4e8b\u4ef6\u9a71\u52a8\u7f16\u7a0b\u662fJavaScript\u4e2d\u4e00\u9879\u5f3a\u5927\u7684\u529f\u80fd\u3002\u5b83\u5141\u8bb8\u4ee3\u7801\u5728\u68c0\u6d4b\u5230\u4e8b\u4ef6\u53d1\u751f\u65f6\u81ea\u52a8\u6267\u884c\u54cd\u5e94\u52a8\u4f5c\uff0c\u4f8b\u5982\u7528\u6237\u70b9\u51fb\u6309\u94ae\u3001\u63d0\u4ea4\u8868\u5355\u6216\u9875\u9762\u5b8c\u6210\u52a0\u8f7d\u7b49\u3002\u8fd9\u79cd\u6a21\u5f0f\u4e0d\u4ec5\u4f7f\u5f97\u7528\u6237\u754c\u9762\u66f4\u52a0\u7075\u6d3b\u548c\u54cd\u5e94\u8fc5\u901f\uff0c\u4e5f\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u4fbf\u7684\u65b9\u5f0f\u6765\u5904\u7406\u5f02\u6b65\u4e8b\u4ef6\uff0c\u589e\u5f3a\u4e86\u7f51\u9875\u5e94\u7528\u7684\u7528\u6237\u4f53\u9a8c\u548c\u6027\u80fd\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u57fa\u7840\u8bed\u6cd5\u548c\u6570\u636e\u7c7b\u578b<\/h3>\n<\/p>\n<p><p>JavaScript\u7684\u57fa\u7840\u8bed\u6cd5\u5305\u62ec\u53d8\u91cf\u58f0\u660e\u3001\u51fd\u6570\u3001\u63a7\u5236\u7ed3\u6784\uff08\u5982if-else\u8bed\u53e5\u3001\u5faa\u73af\u7b49\uff09\u548c\u6570\u636e\u7c7b\u578b\u3002\u5b83\u652f\u6301\u52a8\u6001\u7c7b\u578b\uff0c\u8fd9\u610f\u5473\u7740\u53d8\u91cf\u7684\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u6539\u53d8\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u53d8\u91cf\u548c\u6570\u636e\u7c7b\u578b<\/strong>\uff1aJavaScript\u4e2d\uff0c\u4f7f\u7528<code>var<\/code>\u3001<code>let<\/code>\u6216<code>const<\/code>\u5173\u952e\u5b57\u6765\u58f0\u660e\u53d8\u91cf\u3002\u652f\u6301\u591a\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e<code>Number<\/code>\u3001<code>String<\/code>\u3001<code>Boolean<\/code>\u3001<code>Object<\/code>\u3001<code>Null<\/code>\u548c<code>Undefined<\/code>\u3002<\/li>\n<li><strong>\u51fd\u6570<\/strong>\uff1a\u51fd\u6570\u662f\u91cd\u7528\u4ee3\u7801\u7684\u4e3b\u8981\u65b9\u5f0f\u3002\u5728JavaScript\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u51fd\u6570\u8868\u8fbe\u5f0f\u6216\u51fd\u6570\u58f0\u660e\u6765\u5b9a\u4e49\u51fd\u6570\uff0c\u652f\u6301\u9ad8\u9636\u51fd\u6570\u548c\u56de\u8c03\u51fd\u6570\uff0c\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u7075\u6d3b\u3002<\/li>\n<\/ul>\n<p><h3>\u4e8c\u3001\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b<\/h3>\n<\/p>\n<p><p>JavaScript\u652f\u6301\u57fa\u4e8e\u539f\u578b\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u3002\u5bf9\u8c61\u53ef\u4ee5\u901a\u8fc7\u6784\u9020\u51fd\u6570\u6216\u5bf9\u8c61\u5b57\u9762\u91cf\u7684\u65b9\u5f0f\u521b\u5efa\uff0c\u5bf9\u8c61\u7684\u65b9\u6cd5\u548c\u5c5e\u6027\u53ef\u4ee5\u81ea\u7531\u6dfb\u52a0\u6216\u5220\u9664\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u539f\u578b\u548c\u7ee7\u627f<\/strong>\uff1a\u6bcf\u4e2aJavaScript\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u6307\u5411\u53e6\u4e00\u4e2a\u5bf9\u8c61\u7684\u539f\u578b\u94fe\u63a5\uff0c\u5f53\u8bbf\u95ee\u4e00\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027\u6216\u65b9\u6cd5\u65f6\uff0c\u5982\u679c\u672c\u8eab\u6ca1\u6709\uff0c\u5219\u4f1a\u6cbf\u7740\u539f\u578b\u94fe\u5411\u4e0a\u67e5\u627e\uff0c\u8fd9\u5c31\u662f\u539f\u578b\u7ee7\u627f\u7684\u57fa\u672c\u539f\u7406\u3002<\/li>\n<li><strong>\u6784\u9020\u51fd\u6570\u548c\u5b9e\u4f8b<\/strong>\uff1a\u901a\u8fc7\u6784\u9020\u51fd\u6570\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u7684\u4e00\u79cd\u5e38\u89c1\u6a21\u5f0f\u3002\u6784\u9020\u51fd\u6570\u672c\u8d28\u4e0a\u662f\u666e\u901a\u51fd\u6570\uff0c\u4f46\u4f7f\u7528<code>new<\/code>\u5173\u952e\u5b57\u8c03\u7528\u65f6\uff0c\u5b83\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n<p><h3>\u4e09\u3001\u4e8b\u4ef6\u5904\u7406\u548c\u6587\u6863\u5bf9\u8c61\u6a21\u578b\uff08DOM\uff09<\/h3>\n<\/p>\n<p><p>\u5728JavaScript\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\u6765\u5904\u7406\u7528\u6237\u4ea4\u4e92\uff0c\u5982\u70b9\u51fb\u3001\u6ed1\u52a8\u7b49\u4e8b\u4ef6\u3002\u6b64\u5916\uff0cJavaScript\u80fd\u591f\u901a\u8fc7\u6587\u6863\u5bf9\u8c61\u6a21\u578b\uff08DOM\uff09API\u4e0e\u7f51\u9875\u5185\u5bb9\u4ea4\u4e92\uff0c\u4fee\u6539\u5143\u7d20\u5c5e\u6027\u3001\u6837\u5f0f\u6216\u5185\u5bb9\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u4e8b\u4ef6\u76d1\u542c\u548c\u5904\u7406<\/strong>\uff1aJavaScript\u5141\u8bb8\u4e3a\u5143\u7d20\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u5f53\u7279\u5b9a\u4e8b\u4ef6\u53d1\u751f\u65f6\uff0c\u53ef\u4ee5\u89e6\u53d1\u6307\u5b9a\u7684\u51fd\u6570\u6267\u884c\u3002<\/li>\n<li><strong>DOM\u64cd\u4f5c<\/strong>\uff1a\u901a\u8fc7DOM API\uff0cJavaScript\u80fd\u591f\u8bbf\u95ee\u548c\u4fee\u6539\u7f51\u9875\u7684\u5185\u5bb9\u548c\u7ed3\u6784\u3002\u8fd9\u5305\u62ec\u521b\u5efa\u65b0\u7684\u8282\u70b9\u3001\u66f4\u6539\u8282\u70b9\u7684\u5185\u5bb9\u3001\u6837\u5f0f\u4fee\u6539\u4ee5\u53ca\u8282\u70b9\u7684\u6dfb\u52a0\u548c\u5220\u9664\u3002<\/li>\n<\/ul>\n<p><h3>\u56db\u3001\u5f02\u6b65\u7f16\u7a0b\u548cAJAX<\/h3>\n<\/p>\n<p><p>JavaScript\u7684\u5f02\u6b65\u7f16\u7a0b\u6a21\u5f0f\u662f\u5176\u5f3a\u5927\u529f\u80fd\u4e4b\u4e00\uff0c\u5b83\u5141\u8bb8\u5728\u7b49\u5f85\u67d0\u4efb\u52a1\u5b8c\u6210\u65f6\u7ee7\u7eed\u6267\u884c\u5176\u4ed6\u811a\u672c\uff0c\u63d0\u9ad8\u4e86\u5e94\u7528\u7684\u6027\u80fd\u548c\u54cd\u5e94\u901f\u5ea6\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u56de\u8c03\u51fd\u6570<\/strong>\uff1a\u6700\u521d\u5f02\u6b65\u7f16\u7a0b\u4e3b\u8981\u4f9d\u9760\u56de\u8c03\u51fd\u6570\u5b9e\u73b0\u3002\u867d\u7136\u4f9d\u7136\u5e7f\u6cdb\u4f7f\u7528\uff0c\u4f46\u53ef\u80fd\u5bfc\u81f4\u201c\u56de\u8c03\u5730\u72f1\u201d\uff0c\u4f7f\u4ee3\u7801\u96be\u4ee5\u7406\u89e3\u548c\u7ef4\u62a4\u3002<\/li>\n<li><strong>Promises\u548cAsync\/Aw<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>t<\/strong>\uff1a\u4e3a\u4e86\u89e3\u51b3\u56de\u8c03\u51fd\u6570\u7684\u95ee\u9898\uff0c\u5f15\u5165\u4e86Promises\u3002\u8fdb\u4e00\u6b65\u5730\uff0c<code>async\/await<\/code>\u8bed\u6cd5\u8ba9\u5f02\u6b65\u4ee3\u7801\u770b\u8d77\u6765\u66f4\u50cf\u662f\u540c\u6b65\u4ee3\u7801\uff0c\u6781\u5927\u5730\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6613\u7ef4\u62a4\u6027\u3002<\/li>\n<\/ul>\n<p><p>JavaScript\u7684\u4e30\u5bcc\u7279\u6027\u548c\u5f3a\u5927\u7684\u751f\u6001\u7cfb\u7edf\u4f7f\u5b83\u6210\u4e3a\u5b9e\u73b0\u73b0\u4ee3\u7f51\u9875\u548c\u5e94\u7528\u4e0d\u53ef\u6216\u7f3a\u7684\u5de5\u5177\u3002\u4ece\u7b80\u5355\u7684\u811a\u672c\u5230\u590d\u6742\u7684\u5355\u9875\u5e94\u7528\uff0cJavaScript\u90fd\u626e\u6f14\u7740\u5173\u952e\u89d2\u8272\u3002\u968f\u7740\u6280\u672f\u7684\u53d1\u5c55\uff0cJavaScript\u7684\u53ef\u80fd\u6027\u4e5f\u5728\u4e0d\u65ad\u62d3\u5c55\uff0c\u8ba9\u5f00\u53d1\u8005\u80fd\u591f\u6784\u5efa\u66f4\u52a0\u4e30\u5bcc\u548c\u5f3a\u5927\u7684\u5e94\u7528\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1. \u4ec0\u4e48\u662fJavaScript?<\/strong><br \/>\nJavaScript\u662f\u4e00\u79cd\u811a\u672c\u7f16\u7a0b\u8bed\u8a00\uff0c\u7528\u4e8e\u7ed9\u7f51\u9875\u589e\u52a0\u4ea4\u4e92\u6027\u548c\u52a8\u6001\u529f\u80fd\u3002\u5b83\u53ef\u4ee5\u5d4c\u5165HTML\u4ee3\u7801\u4e2d\uff0c\u901a\u8fc7\u8fd0\u884c\u5728\u5ba2\u6237\u7aef\u6d4f\u89c8\u5668\u4e2d\u7684\u89e3\u91ca\u5668\u6765\u6267\u884c\u3002JavaScript\u53ef\u4ee5\u63a7\u5236\u548c\u64cd\u4f5c\u7f51\u9875\u7684\u5143\u7d20\u3001\u5904\u7406\u7528\u6237\u8f93\u5165\u3001\u54cd\u5e94\u4e8b\u4ef6\u3001\u6267\u884c\u6570\u5b66\u8fd0\u7b97\u7b49\u3002<\/p>\n<p><strong>2. JavaScript\u6709\u54ea\u4e9b\u5e38\u89c1\u5e94\u7528\uff1f<\/strong><br \/>\nJavaScript\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u7f51\u9875\u5f00\u53d1\u548c\u524d\u7aef\u7f16\u7a0b\u3002\u5b83\u53ef\u4ee5\u7528\u6765\u521b\u5efa\u52a8\u6001\u6548\u679c\u3001\u9a8c\u8bc1\u8868\u5355\u6570\u636e\u3001\u52a0\u8f7d\u548c\u66f4\u65b0\u5185\u5bb9\u3001\u5904\u7406\u7528\u6237\u4ea4\u4e92\u7b49\u3002JavaScript\u4e5f\u88ab\u7528\u4e8e\u521b\u5efaWeb\u5e94\u7528\u7a0b\u5e8f\u3001\u79fb\u52a8\u5e94\u7528\u5f00\u53d1\u3001\u6e38\u620f\u5f00\u53d1\u548c\u670d\u52a1\u5668\u7aef\u7f16\u7a0b\u7b49\u9886\u57df\u3002<\/p>\n<p><strong>3. \u5b66\u4e60JavaScript\u6709\u54ea\u4e9b\u91cd\u8981\u7684\u6982\u5ff5\u548c\u6280\u80fd\uff1f<\/strong><br \/>\n\u5b66\u4e60JavaScript\u9700\u8981\u638c\u63e1\u4e00\u4e9b\u57fa\u672c\u6982\u5ff5\u548c\u6280\u80fd\u3002\u9996\u5148\uff0c\u4e86\u89e3\u53d8\u91cf\u3001\u6570\u636e\u7c7b\u578b\u548c\u8fd0\u7b97\u7b26\uff0c\u8fd9\u662f\u7f16\u5199JavaScript\u4ee3\u7801\u7684\u57fa\u7840\u3002\u5176\u6b21\uff0c\u7406\u89e3\u6761\u4ef6\u8bed\u53e5\u548c\u5faa\u73af\u8bed\u53e5\uff0c\u7528\u4e8e\u63a7\u5236\u4ee3\u7801\u7684\u6267\u884c\u6d41\u7a0b\u3002\u6b64\u5916\uff0c\u638c\u63e1\u51fd\u6570\u3001\u5bf9\u8c61\u548c\u6570\u7ec4\u7684\u6982\u5ff5\uff0c\u8fd9\u4e9b\u662f\u7f16\u5199\u4ee3\u7801\u7684\u6838\u5fc3\u5de5\u5177\u3002\u8fd8\u6709\uff0c\u4e86\u89e3DOM\uff08\u6587\u6863\u5bf9\u8c61\u6a21\u578b\uff09\u548c\u4e8b\u4ef6\u5904\u7406\u673a\u5236\uff0c\u8fd9\u662f\u4e3a\u7f51\u9875\u589e\u52a0\u4ea4\u4e92\u6027\u548c\u52a8\u6001\u6548\u679c\u7684\u91cd\u8981\u6280\u672f\u3002\u6700\u540e\uff0c\u5b66\u4e60\u8c03\u8bd5\u6280\u5de7\u548c\u4f7f\u7528\u5f00\u53d1\u5de5\u5177\uff0c\u4ee5\u4fbf\u66f4\u597d\u5730\u5f00\u53d1\u548c\u8c03\u8bd5JavaScript\u4ee3\u7801\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"JavaScript\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u3001\u89e3\u91ca\u578b\u6216\u5373\u65f6\u7f16\u8bd1\u578b\u7684\u7f16\u7a0b\u8bed\u8a00\u3002\u5b83\u901a\u5e38\u7528\u4e8e\u7f51\u9875\u5f00\u53d1\uff0c\u4ee5\u5b9e\u73b0\u5ba2\u6237\u7aef\u811a\u672c\u6765\u8ba9\u7f51\u9875\u5728 [&hellip;]","protected":false},"author":3,"featured_media":157396,"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\/157389"}],"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=157389"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/157389\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/157396"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=157389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=157389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=157389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}