{"id":3161,"date":"2024-11-10T12:22:04","date_gmt":"2024-11-10T04:22:04","guid":{"rendered":"https:\/\/fwq.ai\/blog\/3161\/"},"modified":"2024-11-10T12:22:04","modified_gmt":"2024-11-10T04:22:04","slug":"js%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/3161\/","title":{"rendered":"js\u5982\u4f55\u4f7f\u7528\u53d8\u91cf"},"content":{"rendered":"

\n \u5728 javascript \u4e2d\uff0c\u4f7f\u7528\u53d8\u91cf\u6765\u50a8\u5b58\u6570\u636e\uff0c\u65b9\u4fbf\u5f15\u7528\u548c\u64cd\u4f5c\u3002\u4f7f\u7528 var\u3001let \u6216 const \u58f0\u660e\u53d8\u91cf\uff0c\u5e76\u7528 = \u8d4b\u503c\u53f7\u8fdb\u884c\u521d\u59cb\u5316\u3002var \u53d8\u91cf\u5177\u6709\u5168\u5c40\u4f5c\u7528\u57df\uff0clet \u548c const \u53d8\u91cf\u5177\u6709\u5757\u7ea7\u4f5c\u7528\u57df\u3002const \u58f0\u660e\u7684\u53d8\u91cf\u662f\u5e38\u91cf\uff0c\u4e0d\u53ef\u66f4\u6539\u3002javascript \u53d8\u91cf\u53ef\u4ee5\u5b58\u50a8\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5305\u62ec\u5b57\u7b26\u4e32\u3001\u6570\u5b57\u3001\u5e03\u5c14\u503c\u3001\u5bf9\u8c61\u548c\u6570\u7ec4\u3002\u547d\u540d\u53d8\u91cf\u65f6\uff0c\u9075\u5faa\u826f\u597d\u7684\u547d\u540d\u7ea6\u5b9a\u53ef\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\n<\/p><\/blockquote>\n

\"js\u5982\u4f55\u4f7f\u7528\u53d8\u91cf\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5728 JavaScript \u4e2d\u4f7f\u7528\u53d8\u91cf<\/strong><\/p>\n

\u5728 JavaScript \u4e2d\uff0c\u53d8\u91cf\u7528\u4e8e\u5b58\u50a8\u6570\u636e\uff0c\u65b9\u4fbf\u7a0b\u5e8f\u5728\u4e0d\u540c\u7684\u4e2d\u5f15\u7528\u548c\u64cd\u4f5c\u8fd9\u4e9b\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u6709\u5173\u5982\u4f55\u5728 JavaScript \u4e2d\u4f7f\u7528\u53d8\u91cf\u7684\u8be6\u7ec6\u6307\u5357\uff1a<\/p>\n

1. \u58f0\u660e\u53d8\u91cf<\/strong><\/p>\n

\u4f7f\u7528 var\u3001let \u6216 const \u5173\u952e\u5b57\u58f0\u660e\u53d8\u91cf\u3002var \u662f\u6700\u4f20\u7edf\u7684\u65b9\u5f0f\uff0clet \u548c const \u662f ES6 \u4e2d\u5f15\u5165\u7684\u66f4\u73b0\u4ee3\u7684\u65b9\u5f0f\u3002<\/p>\n

var fruit = \"apple\";  \/\/ \u5168\u5c40\u4f5c\u7528\u57df\u53d8\u91cf\nlet age = 25;  \/\/ \u5757\u7ea7\u4f5c\u7528\u57df\u53d8\u91cf\nconst PI = 3.14;  \/\/ \u5e38\u91cf\u53d8\u91cf<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
2. \u521d\u59cb\u5316\u53d8\u91cf<\/strong><\/p>\n
\u58f0\u660e\u53d8\u91cf\u540e\uff0c\u53ef\u4ee5\u7acb\u5373\u4f7f\u7528 = \u8d4b\u503c\u53f7\u521d\u59cb\u5316\u5176\u503c\u3002<\/p>\n
var greeting = \"Hello world!\";<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
3. \u53d8\u91cf\u4f5c\u7528\u57df<\/strong><\/p>\n
    \n
  • var \u58f0\u660e\u7684\u53d8\u91cf\u5177\u6709\u5168\u5c40\u4f5c\u7528\u57df\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u53ef\u4ee5\u5728\u811a\u672c\u4e2d\u7684\u4efb\u4f55\u5730\u65b9\u8bbf\u95ee\u3002<\/li>\n
  • let \u548c const \u58f0\u660e\u7684\u53d8\u91cf\u5177\u6709\u5757\u7ea7\u4f5c\u7528\u57df\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u4ec5\u5728\u58f0\u660e\u5b83\u4eec\u7684\u5757\u4e2d\u53ef\u7528\u3002<\/li>\n<\/ul>\n
    4. \u5e38\u91cf\u53d8\u91cf<\/strong><\/p>\n
    \u4f7f\u7528 const \u5173\u952e\u5b57\u58f0\u660e\u7684\u53d8\u91cf\u662f\u5e38\u91cf\u53d8\u91cf\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u7684\u503c\u4e0d\u80fd\u5728\u4ee5\u540e\u66f4\u6539\u3002<\/p>\n
    const MAX_AGE = 100;<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    5. \u6570\u636e\u7c7b\u578b<\/strong><\/p>\n
    JavaScript \u53d8\u91cf\u53ef\u4ee5\u5b58\u50a8\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5305\u62ec\u5b57\u7b26\u4e32\u3001\u6570\u5b57\u3001\u5e03\u5c14\u503c\u3001\u5bf9\u8c61\u548c\u6570\u7ec4\u3002\u53d8\u91cf\u7684\u7c7b\u578b\u6839\u636e\u5176\u503c\u800c\u5b9a\u3002<\/p>\n
    var name = \"John\";  \/\/ \u5b57\u7b26\u4e32\nvar age = 30;  \/\/ \u6570\u5b57\nvar isAlive = true;  \/\/ \u5e03\u5c14\u503c<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    6. \u4f7f\u7528\u53d8\u91cf<\/strong><\/p>\n
    \u58f0\u660e\u548c\u521d\u59cb\u5316\u53d8\u91cf\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u5176\u540d\u79f0\u5f15\u7528\u548c\u64cd\u4f5c\u5b83\u4eec\u3002<\/p>\n
    console.log(greeting);  \/\/ \u8f93\u51fa \"Hello world!\"\nage++;  \/\/ \u5c06 \"age\" \u589e\u5927 1<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    7. \u547d\u540d\u53d8\u91cf<\/strong><\/p>\n
    \u9075\u5faa\u826f\u597d\u7684\u547d\u540d\u7ea6\u5b9a\u53ef\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u4ee5\u4e0b\u662f JavaScript \u53d8\u91cf\u547d\u540d\u7684\u4e00\u4e9b\u6700\u4f73\u5b9e\u8df5\uff1a<\/p>\n
      \n
    • \u4f7f\u7528\u6709\u610f\u4e49\u7684\u540d\u79f0<\/li>\n
    • \u4f7f\u7528\u5c0f\u5199\u5b57\u6bcd\u5e76\u7528\u4e0b\u5212\u7ebf\u5206\u9694\u5355\u8bcd<\/li>\n
    • \u907f\u514d\u4f7f\u7528\u4fdd\u7559\u5b57\u548c\u7279\u6b8a\u5b57\u7b26<\/li>\n<\/ul>\n
      \u901a\u8fc7\u9075\u5faa\u8fd9\u4e9b\u6307\u5357\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u4f7f\u7528\u53d8\u91cf\u6765\u5b58\u50a8\u548c\u64cd\u4f5c\u6570\u636e\uff0c\u4ece\u800c\u7f16\u5199\u66f4\u6e05\u6670\u3001\u66f4\u5065\u58ee\u7684 JavaScript \u4ee3\u7801\u3002<\/p>\n
      \u4ee5\u4e0a\u5c31\u662fjs\u5982\u4f55\u4f7f\u7528\u53d8\u91cf\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u5728 javascript \u4e2d\uff0c\u4f7f\u7528\u53d8\u91cf\u6765\u50a8\u5b58\u6570\u636e\uff0c\u65b9\u4fbf\u5f15\u7528\u548c\u64cd\u4f5c\u3002\u4f7f\u7528 var\u3001let \u6216 const \u58f0\u660e\u53d8\u91cf\uff0c\u5e76\u7528 = \u8d4b\u503c\u53f7\u8fdb\u884c\u521d\u59cb\u5316\u3002var \u53d8\u91cf\u5177\u6709\u5168\u5c40\u4f5c\u7528\u57df\uff0clet \u548c const \u53d8\u91cf\u5177\u6709\u5757\u7ea7\u4f5c\u7528\u57df\u3002const \u58f0\u660e\u7684\u53d8\u91cf\u662f\u5e38\u91cf\uff0c\u4e0d\u53ef\u66f4\u6539\u3002javascript \u53d8\u91cf\u53ef\u4ee5\u5b58\u50a8\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5305\u62ec\u5b57\u7b26\u4e32\u3001\u6570\u5b57\u3001\u5e03\u5c14\u503c\u3001\u5bf9\u8c61\u548c\u6570\u7ec4\u3002\u547d\u540d\u53d8\u91cf\u65f6\uff0c\u9075\u5faa\u826f\u597d\u7684\u547d\u540d\u7ea6\u5b9a\u53ef\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002 \u5982\u4f55\u5728 JavaScript \u4e2d\u4f7f\u7528\u53d8\u91cf \u5728 JavaScript \u4e2d\uff0c\u53d8\u91cf\u7528\u4e8e\u5b58\u50a8\u6570\u636e\uff0c\u65b9\u4fbf\u7a0b\u5e8f\u5728\u4e0d\u540c\u7684\u4e2d\u5f15\u7528\u548c\u64cd\u4f5c\u8fd9\u4e9b\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u6709\u5173\u5982\u4f55\u5728 JavaScript \u4e2d\u4f7f\u7528\u53d8\u91cf\u7684\u8be6\u7ec6\u6307\u5357\uff1a 1. \u58f0\u660e\u53d8\u91cf \u4f7f\u7528 var\u3001let \u6216 const \u5173\u952e\u5b57\u58f0\u660e\u53d8\u91cf\u3002var \u662f\u6700\u4f20\u7edf\u7684\u65b9\u5f0f\uff0clet \u548c const \u662f ES6 \u4e2d\u5f15\u5165\u7684\u66f4\u73b0\u4ee3\u7684\u65b9\u5f0f\u3002 var fruit = “apple”; \/\/ \u5168\u5c40\u4f5c\u7528\u57df\u53d8\u91cf let age = 25; \/\/ \u5757\u7ea7\u4f5c\u7528\u57df\u53d8\u91cf const PI = 3.14; \/\/ \u5e38\u91cf\u53d8\u91cf \u767b\u5f55\u540e\u590d\u5236 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3161","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3161","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=3161"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3161\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=3161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=3161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=3161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}