{"id":2035,"date":"2025-02-25T22:40:50","date_gmt":"2025-02-25T14:40:50","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2035"},"modified":"2025-02-25T22:40:50","modified_gmt":"2025-02-25T14:40:50","slug":"javascript-%e6%af%94%e8%be%83-%e5%92%8c-%e9%80%bb%e8%be%91%e8%bf%90%e7%ae%97%e7%ac%a6","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/02\/25\/javascript-%e6%af%94%e8%be%83-%e5%92%8c-%e9%80%bb%e8%be%91%e8%bf%90%e7%ae%97%e7%ac%a6\/","title":{"rendered":"JavaScript \u6bd4\u8f83 \u548c \u903b\u8f91\u8fd0\u7b97\u7b26"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">\u4e00\u3001<strong>JavaScript \u6bd4\u8f83\u8fd0\u7b97\u7b26\uff08Comparison Operators\uff09<\/strong><\/h3>\n\n\n\n<p>\u6bd4\u8f83\u8fd0\u7b97\u7b26\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u7684\u5927\u5c0f\u5173\u7cfb\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff08<code>true<\/code> \u6216 <code>false<\/code>\uff09\u3002\u4e0b\u9762\u662f\u5e38\u89c1\u7684\u6bd4\u8f83\u8fd0\u7b97\u7b26\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7b49\u4e8e\uff08<code>==<\/code>\uff09<\/strong><br>\u5224\u65ad\u4e24\u4e2a\u64cd\u4f5c\u6570\u662f\u5426\u76f8\u7b49\uff0c<strong>\u4e0d\u8003\u8651\u6570\u636e\u7c7b\u578b<\/strong>\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = 10;\n   let y = '10';\n   console.log(x == y);  \/\/ \u8f93\u51fa: true \uff08\u56e0\u4e3a JavaScript \u4f1a\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\uff09<\/code><\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u4e25\u683c\u7b49\u4e8e\uff08<code>===<\/code>\uff09<\/strong><br>\u5224\u65ad\u4e24\u4e2a\u64cd\u4f5c\u6570\u662f\u5426\u4e25\u683c\u76f8\u7b49\uff0c<strong>\u8003\u8651\u6570\u636e\u7c7b\u578b<\/strong>\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = 10;\n   let y = '10';\n   console.log(x === y);  \/\/ \u8f93\u51fa: false \uff08\u56e0\u4e3a\u6570\u636e\u7c7b\u578b\u4e0d\u540c\uff09<\/code><\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u4e0d\u7b49\u4e8e\uff08<code>!=<\/code>\uff09<\/strong><br>\u5224\u65ad\u4e24\u4e2a\u64cd\u4f5c\u6570\u662f\u5426\u4e0d\u76f8\u7b49\uff0c<strong>\u4e0d\u8003\u8651\u6570\u636e\u7c7b\u578b<\/strong>\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = 10;\n   let y = 5;\n   console.log(x != y);  \/\/ \u8f93\u51fa: true<\/code><\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u4e25\u683c\u4e0d\u7b49\u4e8e\uff08<code>!==<\/code>\uff09<\/strong><br>\u5224\u65ad\u4e24\u4e2a\u64cd\u4f5c\u6570\u662f\u5426\u4e25\u683c\u4e0d\u76f8\u7b49\uff0c<strong>\u8003\u8651\u6570\u636e\u7c7b\u578b<\/strong>\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = 10;\n   let y = '10';\n   console.log(x !== y);  \/\/ \u8f93\u51fa: true \uff08\u56e0\u4e3a\u6570\u636e\u7c7b\u578b\u4e0d\u540c\uff09<\/code><\/pre>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li><strong>\u5927\u4e8e\uff08<code>><\/code>\uff09<\/strong><br>\u5224\u65ad\u5de6\u4fa7\u64cd\u4f5c\u6570\u662f\u5426\u5927\u4e8e\u53f3\u4fa7\u64cd\u4f5c\u6570\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = 10;\n   let y = 5;\n   console.log(x &gt; y);  \/\/ \u8f93\u51fa: true<\/code><\/pre>\n\n\n\n<ol start=\"6\" class=\"wp-block-list\">\n<li><strong>\u5c0f\u4e8e\uff08<code>&lt;<\/code>\uff09<\/strong><br>\u5224\u65ad\u5de6\u4fa7\u64cd\u4f5c\u6570\u662f\u5426\u5c0f\u4e8e\u53f3\u4fa7\u64cd\u4f5c\u6570\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = 5;\n   let y = 10;\n   console.log(x &lt; y);  \/\/ \u8f93\u51fa: true<\/code><\/pre>\n\n\n\n<ol start=\"7\" class=\"wp-block-list\">\n<li><strong>\u5927\u4e8e\u7b49\u4e8e\uff08<code>>=<\/code>\uff09<\/strong><br>\u5224\u65ad\u5de6\u4fa7\u64cd\u4f5c\u6570\u662f\u5426\u5927\u4e8e\u6216\u7b49\u4e8e\u53f3\u4fa7\u64cd\u4f5c\u6570\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = 10;\n   let y = 10;\n   console.log(x &gt;= y);  \/\/ \u8f93\u51fa: true<\/code><\/pre>\n\n\n\n<ol start=\"8\" class=\"wp-block-list\">\n<li><strong>\u5c0f\u4e8e\u7b49\u4e8e\uff08<code>&lt;=<\/code>\uff09<\/strong><br>\u5224\u65ad\u5de6\u4fa7\u64cd\u4f5c\u6570\u662f\u5426\u5c0f\u4e8e\u6216\u7b49\u4e8e\u53f3\u4fa7\u64cd\u4f5c\u6570\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = 5;\n   let y = 10;\n   console.log(x &lt;= y);  \/\/ \u8f93\u51fa: true<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u4e8c\u3001JavaScript \u903b\u8f91\u8fd0\u7b97\u7b26\uff08Logical Operators\uff09<\/strong><\/h3>\n\n\n\n<p>\u903b\u8f91\u8fd0\u7b97\u7b26\u7528\u4e8e\u8fde\u63a5\u591a\u4e2a\u6761\u4ef6\u8868\u8fbe\u5f0f\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\u3002JavaScript \u4e2d\u5e38\u7528\u7684\u903b\u8f91\u8fd0\u7b97\u7b26\u6709\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e0e\uff08<code>&amp;&amp;<\/code>\uff09<\/strong><br>\u5982\u679c\u4e24\u4e2a\u64cd\u4f5c\u6570\u90fd\u4e3a <code>true<\/code>\uff0c\u5219\u8fd4\u56de <code>true<\/code>\uff0c\u5426\u5219\u8fd4\u56de <code>false<\/code>\u3002\u5b83\u7528\u4e8e\u8868\u793a\u201c\u4e0e\u201d\u5173\u7cfb\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = true;\n   let y = false;\n   console.log(x &amp;&amp; y);  \/\/ \u8f93\u51fa: false \uff08\u56e0\u4e3a y \u4e3a false\uff09<\/code><\/pre>\n\n\n\n<p>\u903b\u8f91\u4e0e\u8fd0\u7b97\u7b26\u662f<strong>\u77ed\u8def\u8fd0\u7b97\u7b26<\/strong>\uff0c\u5373\u5982\u679c\u7b2c\u4e00\u4e2a\u64cd\u4f5c\u6570\u662f <code>false<\/code>\uff0c\u5219\u4e0d\u4f1a\u518d\u8ba1\u7b97\u7b2c\u4e8c\u4e2a\u64cd\u4f5c\u6570\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = false;\n   let y = true;\n   console.log(x &amp;&amp; y);  \/\/ \u8f93\u51fa: false \uff08\u4e0d\u518d\u8ba1\u7b97 y\uff09<\/code><\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u6216\uff08<code>||<\/code>\uff09<\/strong><br>\u5982\u679c\u4e24\u4e2a\u64cd\u4f5c\u6570\u4e2d\u6709\u4e00\u4e2a\u4e3a <code>true<\/code>\uff0c\u5219\u8fd4\u56de <code>true<\/code>\uff0c\u5982\u679c\u90fd\u4e3a <code>false<\/code>\uff0c\u5219\u8fd4\u56de <code>false<\/code>\u3002\u5b83\u7528\u4e8e\u8868\u793a\u201c\u6216\u201d\u5173\u7cfb\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = true;\n   let y = false;\n   console.log(x || y);  \/\/ \u8f93\u51fa: true \uff08\u56e0\u4e3a x \u4e3a true\uff09<\/code><\/pre>\n\n\n\n<p>\u903b\u8f91\u6216\u8fd0\u7b97\u7b26\u662f<strong>\u77ed\u8def\u8fd0\u7b97\u7b26<\/strong>\uff0c\u5373\u5982\u679c\u7b2c\u4e00\u4e2a\u64cd\u4f5c\u6570\u662f <code>true<\/code>\uff0c\u5219\u4e0d\u4f1a\u518d\u8ba1\u7b97\u7b2c\u4e8c\u4e2a\u64cd\u4f5c\u6570\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = true;\n   let y = false;\n   console.log(x || y);  \/\/ \u8f93\u51fa: true \uff08\u4e0d\u518d\u8ba1\u7b97 y\uff09<\/code><\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u975e\uff08<code>!<\/code>\uff09<\/strong><br>\u5c06\u64cd\u4f5c\u6570\u7684\u5e03\u5c14\u503c\u53d6\u53cd\u3002\u5982\u679c\u503c\u4e3a <code>true<\/code>\uff0c\u5219\u8fd4\u56de <code>false<\/code>\uff1b\u5982\u679c\u503c\u4e3a <code>false<\/code>\uff0c\u5219\u8fd4\u56de <code>true<\/code>\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>   let x = true;\n   console.log(!x);  \/\/ \u8f93\u51fa: false\n\n   let y = false;\n   console.log(!y);  \/\/ \u8f93\u51fa: true<\/code><\/pre>\n\n\n\n<p>\u903b\u8f91\u975e\u8fd0\u7b97\u7b26\u5e38\u7528\u4e8e\u6761\u4ef6\u5224\u65ad\u4e2d\uff0c\u53cd\u8f6c\u5e03\u5c14\u503c\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e09\u3001<strong>\u7ed3\u5408\u6bd4\u8f83\u8fd0\u7b97\u7b26\u4e0e\u903b\u8f91\u8fd0\u7b97\u7b26\u7684\u793a\u4f8b<\/strong><\/h3>\n\n\n\n<p>\u53ef\u4ee5\u5c06\u6bd4\u8f83\u8fd0\u7b97\u7b26\u548c\u903b\u8f91\u8fd0\u7b97\u7b26\u7ed3\u5408\u4f7f\u7528\u8fdb\u884c\u591a\u6761\u4ef6\u5224\u65ad\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let age = 20;\nlet hasPermission = true;\n\n\/\/ \u5224\u65ad\u5e74\u9f84\u662f\u5426\u5927\u4e8e 18 \u4e14\u662f\u5426\u6709\u6743\u9650\nif (age &gt; 18 &amp;&amp; hasPermission) {\n  console.log(\"\u53ef\u4ee5\u8bbf\u95ee\u8be5\u9875\u9762\");\n} else {\n  console.log(\"\u65e0\u6cd5\u8bbf\u95ee\u8be5\u9875\u9762\");\n}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u6761\u4ef6\u5224\u65ad\u7ed3\u5408\u4e86\u201c\u5e74\u9f84\u662f\u5426\u5927\u4e8e 18\u201d\u4e0e\u201c\u662f\u5426\u6709\u6743\u9650\u201d\uff0c\u53ea\u6709\u5728\u4e24\u4e2a\u6761\u4ef6\u90fd\u4e3a <code>true<\/code> \u65f6\u624d\u4f1a\u8f93\u51fa\u201c\u53ef\u4ee5\u8bbf\u95ee\u8be5\u9875\u9762\u201d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u603b\u7ed3<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6bd4\u8f83\u8fd0\u7b97\u7b26<\/strong>\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u5e76\u8fd4\u56de\u5e03\u5c14\u503c\u3002\u5e38\u89c1\u7684\u6709 <code>==<\/code>\u3001<code>===<\/code>\u3001<code>!=<\/code>\u3001<code>!==<\/code>\u3001<code>><\/code>\u3001<code>&lt;<\/code>\u3001<code>>=<\/code>\u3001<code>&lt;=<\/code>\u3002<\/li>\n\n\n\n<li><strong>\u903b\u8f91\u8fd0\u7b97\u7b26<\/strong>\u7528\u4e8e\u8fde\u63a5\u591a\u4e2a\u6761\u4ef6\u8868\u8fbe\u5f0f\uff0c\u5e38\u89c1\u7684\u6709 <code>&amp;&amp;<\/code>\uff08\u4e0e\uff09\u3001<code>||<\/code>\uff08\u6216\uff09\u548c <code>!<\/code>\uff08\u975e\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001JavaScript \u6bd4\u8f83\u8fd0\u7b97\u7b26\uff08Comparison Operators\uff09 \u6bd4\u8f83\u8fd0\u7b97\u7b26\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u503c\u7684\u5927 [&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-2035","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2035","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=2035"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2035\/revisions"}],"predecessor-version":[{"id":2036,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2035\/revisions\/2036"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2035"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2035"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2035"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}