{"id":31596,"date":"2023-12-24T23:08:13","date_gmt":"2023-08-15T03:37:24","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%94%b6%e9%9b%86javascript\/"},"modified":"2024-05-04T15:14:22","modified_gmt":"2024-05-04T07:14:22","slug":"%e6%94%b6%e9%9b%86javascript","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%94%b6%e9%9b%86javascript\/","title":{"rendered":"\u6536\u96c6JavaScript"},"content":{"rendered":"<h1>JavaScript\u662f\u4e00\u79cd\u7f16\u7a0b\u8bed\u8a00\u3002<\/h1>\n<p>\u30fb\u8fd9\u662f\u4e3a\u4e86\u65b9\u4fbf\u7528\u6237\u7aef\u7684\u7f51\u7edc\u6d4f\u89c8\u5668\u4e0e\u7f51\u7ad9\u6216\u670d\u52a1\u8fdb\u884c\u4e92\u52a8\u4ea4\u6d41\u7684\u5de5\u5177\u3002<br \/>\n\u30fb\u80fd\u591f\u5728\u7f51\u9875\u4e2d\u6dfb\u52a0\u7c7b\u4f3c\u52a8\u6001\u5185\u5bb9\u7684\u590d\u6742\u529f\u80fd\u3002<br \/>\n\u30fb\u6211\u4eec\u5728\u6d4f\u89c8\u5668\u4e0a\u6240\u4f53\u9a8c\u5230\u7684\u5c31\u662f\u901a\u8fc7JavaScript\u5904\u7406\u800c\u6765\u7684\u3002<br \/>\n\u30fb\u53ef\u4ee5\u8bf4JavaScript\u662f\u6700\u53d7\u6b22\u8fce\u7684\u7f16\u7a0b\u8bed\u8a00\u3002<\/p>\n<h1>\u5e38\u89c1\u7684JavaScript\u5e94\u7528\u5b9e\u4f8b<\/h1>\n<p>\u30fb\u786e\u8ba4\u60a8\u662f\u5426\u4ee5\u9002\u5f53\u7684\u683c\u5f0f\u5728\u8868\u5355\u4e2d\u8f93\u5165\u4e86\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u3002<br \/>\n\u30fb\u9875\u9762\u52a0\u8f7d\u65f6\uff0c\u81ea\u52a8\u5728\u641c\u7d22\u6846\u4e2d\u663e\u793a\u6587\u672c\u5149\u6807\u3002<br \/>\n\u30fb\u53ef\u4ee5\u7acb\u5373\u5904\u7406\u4efb\u52a1\uff08\u4f8b\u5982\u5bc6\u7801\u8ba4\u8bc1\uff09\uff0c\u800c\u65e0\u9700\u8fdb\u884c\u4e0e\u7f51\u7ad9\u548c\u670d\u52a1\u5668\u7684\u4fe1\u606f\u4f20\u8f93\u3002<\/p>\n<h1>jQuery \u662f\u4ec0\u4e48<\/h1>\n<p>\u30fb\u8fd9\u662f\u4e00\u4e2aJavaScript\u5e93\uff0c\u5b83\u6269\u5c55\u4e86JS\u4f7f\u5176\u66f4\u6613\u4e8e\u4f7f\u7528\u3002<br \/>\n\u30fb\u8d85\u8fc7\u4e03\u6210\u7684\u7f51\u7ad9\u90fd\u4f7f\u7528jQuery\uff01<br \/>\n\u30fb\u53ef\u4ee5\u901a\u8fc7\u7b80\u77ed\u7684\u4ee3\u7801\u4e3a\u52a8\u753b\u548c\u8f93\u5165\u8868\u5355\u7b49\u6dfb\u52a0\u52a8\u6001\u6548\u679c\u3002<br \/>\n\u30fb\u9002\u7528\u4e8e\u4efb\u4f55\u6d4f\u89c8\u5668\u3002<\/p>\n<h1>\u5728Progate\u7684Javascript (ES6)\u8bfe\u7a0b\u4e2d\uff0c\u6211\u5b66\u5230\u4e86\u65b0\u7684\u77e5\u8bc6\u3002<\/h1>\n<h3>\u77e5\u9053\u4e86\u5c31\u25ef<\/h3>\n<p>\u5728\u57fa\u672c\u4ee3\u7801\u7684\u672b\u5c3e\u52a0\u4e0a\u5206\u53f7\u3002<br \/>\n\u5e38\u91cf(const)\u65e0\u6cd5\u50cf\u53d8\u91cf(let)\u4e00\u6837\u88ab\u66f4\u65b0\u5176\u503c\u3002<br \/>\n\u7136\u800c\uff0c\u5728\u4ee3\u7801\u53d8\u5f97\u5f88\u957f\u65f6\uff0c\u53ef\u4ee5\u9632\u6b62\u610f\u5916\u66f4\u65b0\u503c\u3002<\/p>\n<h3>\u2160 : \u6211\u975e\u5e38\u559c\u6b22\u4e2d\u56fd\u7684\u7f8e\u98df\uff0c\u5c24\u5176\u662f\u5317\u4eac\u70e4\u9e2d\u548c\u56db\u5ddd\u706b\u9505\u3002\u5b83\u4eec\u90fd\u975e\u5e38\u7f8e\u5473\uff0c\u800c\u4e14\u7ed9\u4eba\u4e00\u79cd\u72ec\u7279\u800c\u7f8e\u5999\u7684\u5473\u89c9\u4f53\u9a8c\u3002<\/h3>\n<h5>\u5982\u679c\u7684\u8a71<\/h5>\n<p>\u5982\u679c\uff08\u6761\u4ef6\u5f0f1\uff09\u6210\u7acb\u7684\u8bdd\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u3002<br \/>\n\u5426\u5219\uff0c\u5982\u679c\uff08\u6761\u4ef6\u5f0f2\uff09\u6210\u7acb\u7684\u8bdd\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u3002<br \/>\n\u5426\u5219\uff0c\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u3002<br \/>\n\u8fdb\u884c\u6761\u4ef6\u5206\u5c90\u3002<\/p>\n<h5>\u8f6c\u6362\u8bed\u53e5<\/h5>\n<p>\u6839\u636e\u6761\u4ef6\u7684\u503c\u8fdb\u884c\u9009\u62e9:<br \/>\n\u5982\u679c\u6761\u4ef6\u7684\u503c\u7b49\u4e8e \u503c1,\u5219\u6267\u884c\u5bf9\u5e94\u7684\u64cd\u4f5c\u5e76\u8df3\u51fa\u5faa\u73af;<br \/>\n\u5982\u679c\u6761\u4ef6\u7684\u503c\u7b49\u4e8e \u503c2,\u5219\u6267\u884c\u5bf9\u5e94\u7684\u64cd\u4f5c\u5e76\u8df3\u51fa\u5faa\u73af;<br \/>\n&#8230;<br \/>\n\u5982\u679c\u6761\u4ef6\u7684\u503c\u4e0e\u4ee5\u4e0a\u4efb\u4f55\u503c\u90fd\u4e0d\u76f8\u7b49,\u5219\u6267\u884c\u9ed8\u8ba4\u64cd\u4f5c\u5e76\u8df3\u51fa\u5faa\u73af\u3002<\/p>\n<h5>\u6bd4\u8f83\u8fd0\u7b97\u7b26<\/h5>\n<p>\u30fb\u7528a===b\u6765\u68c0\u67e5a\u548cb\u662f\u5426\u76f8\u7b49\u3002<br \/>\n\u30fb\u7528a!==b\u6765\u68c0\u67e5a\u548cb\u662f\u5426\u4e0d\u540c\u3002<\/p>\n<p>const number = 12;<br \/>\nconsole.log(number === 12);<br \/>\n\u63a7\u5236\u53f0\u8f93\u51fa &#8220;true&#8221;<\/p>\n<h5>\u5176\u4ed6<\/h5>\n<p>\u30fb\u63a7\u5236\u53f0\u8f93\u51fa console.log();\u4e2d\u7684\u6587\u672c\u3002<br \/>\n\u30fb\u4ee5 \/\/ \u6ce8\u91ca\u4ee3\u7801\u884c\u3002<br \/>\n\u30fb\u4f7f\u7528 let \u53d8\u91cf\u540d=\u503c; \u5b9a\u4e49\u53d8\u91cf\u3002\u5728\u8fdb\u884c\u8986\u5199\u65f6\uff0c\u4e0d\u9700\u8981\u4f7f\u7528 let\u3002<br \/>\n\u30fb\u4f7f\u7528 const \u5e38\u91cf\u540d=\u503c; \u5b9a\u4e49\u5e38\u91cf\u3002<br \/>\n\u30fb\u4f7f\u7528 ${} \u5c06\u5e38\u91cf\u548c\u53d8\u91cf\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u3002\u5728\u6b64\u8fc7\u7a0b\u4e2d\uff0c\u6574\u4e2a\u5b57\u7b26\u4e32\u4f7f\u7528\u201c\u3164\uff40\u3164\u201d\u62ec\u8d77\u6765\u3002<br \/>\n\u30fb\u4f7f\u7528 X &amp;&amp; Y \u8fdb\u884c\u591a\u4e2a\u6761\u4ef6\u5224\u65ad\uff08X\u548cY\uff09\u3002<br \/>\n\u30fb\u4f7f\u7528 X || Y \u8fdb\u884c\u591a\u4e2a\u6761\u4ef6\u5224\u65ad\uff08X\u6216Y\uff09\u3002<\/p>\n<h3>\u7b2c\u4e8c<\/h3>\n<h5>\u5f53\u2026\u9f84<\/h5>\n<p>\u5f53\u6761\u4ef6\u5f0f\u6210\u7acb\u65f6\uff0c<br \/>\n\u6267\u884c\u6b64\u5904\u4ee3\u7801<br \/>\n\u6761\u4ef6\u5f0f\u6301\u7eed\u6210\u7acb<\/p>\n<p>\u5728\u6570\u5b57\u5c0f\u4e8e\u7b49\u4e8e100\u7684\u60c5\u51b5\u4e0b\uff0c\u9010\u4e2a\u6253\u5370\u6570\u5b57\u5e76\u5c06\u6570\u5b57\u589e\u52a01\u3002<\/p>\n<h5>&#8220;\u7528\u4e8e\u5faa\u73af\u7684\u4ee3\u7801\u90e8\u5206&#8221;<\/h5>\n<p>\u5728\u53d8\u91cf\u5b9a\u4e49\u7684\u540c\u65f6\uff0c\u6839\u636e\u6761\u4ef6\u8868\u8fbe\u5f0f\u8fdb\u884c\u5faa\u73af\uff0c\u53ea\u8981\u6761\u4ef6\u8868\u8fbe\u5f0f\u4e3a\u771f\uff0c\u5219\u6267\u884c\u6b64\u5904\u7684\u4ee3\u7801\u3002\u79fb\u9664\u5206\u53f7\u3002<\/p>\n<p>for(let number=1 ;number&lt;=100; number+=1){<br \/>\nconsole.log(number);<br \/>\n}<br \/>\n\u5728\u63a7\u5236\u53f0\u6253\u5370\u51fa&#8221;1 2 3&#8230;&#8221;<\/p>\n<h5>\u5176\u4ed6<\/h5>\n<p>\u30fb+=1=++ (\u9012\u589e1)<br \/>\n\u30fb-=1=&#8211; (\u9012\u51cf1)<br \/>\n\u30fb\u53ef\u4ee5\u5728\u5bf9\u8c61\u5185\u653e\u7f6e\u5bf9\u8c61\u3002<br \/>\n\u8c03\u7528\u65b9\u5f0f\u4e3a &#8220;\u5bf9\u8c61\u540d\u79f0.\u5bf9\u8c61\u540d\u79f0.\u5c5e\u6027&#8221;<br \/>\n\uff08\u4f8b\uff09<br \/>\nconst cafe = {<br \/>\nname: &#8220;\u5496\u5561\u9986&#8221;,<br \/>\nbusinessHours: {<br \/>\nopening: &#8220;10:00(\u4e0a\u5348)&#8221;,<br \/>\nclosing: &#8220;8:00(\u4e0b\u5348)&#8221;,<br \/>\n},<br \/>\n};<\/p>\n<h3>\u7b2c\u4e09<\/h3>\n<p>\u30fb\u7528const\u5173\u952e\u5b57\u5b9a\u4e49\u4e00\u4e2a\u5e38\u91cf\u540d\u4e3a\u51fd\u6570\u540d\u7684\u51fd\u6570(){&#8230;}\u3002<br \/>\n\u30fb\u5c06function()\u7b80\u5199\u4e3a()=&gt;\uff0c\u8fd9\u662f\u7bad\u5934\u51fd\u6570\u3002\u5f88\u65b9\u4fbf\uff01<br \/>\n\u30fb\u901a\u8fc7\u5e38\u91cf\u540d()\u8c03\u7528\u51fd\u6570\u3002<br \/>\n\u30fb\u7528const\u5173\u952e\u5b57\u5b9a\u4e49\u4e00\u4e2a\u5e38\u91cf\u540d\u4e3a\u51fd\u6570\u540d\u7684\u51fd\u6570(\u53c2\u6570\u540d)=&gt;{&#8230;}\uff0c\u7528\u4e8e\u63a5\u6536\u53c2\u6570\u3002<br \/>\n\u30fb\u5728\u51fd\u6570\u5185\u4f7f\u7528return\u8bed\u53e5\uff0c\u8fd9\u6837\u540e\u9762\u7684\u4ee3\u7801\u5c06\u4e0d\u4f1a\u6267\u884c\uff0c\u53ef\u4ee5\u5728\u8c03\u7528\u5904\u63a5\u6536\u5230\u8fd4\u56de\u503c\u3002<\/p>\n<h3>\u7b2c\u56db<\/h3>\n<p>\u5728Java\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528&#8221;class&#8221;\u5173\u952e\u5b57\u6765\u8bbe\u8ba1\u4e00\u4e2a\u7c7b\uff08\u7c7b\u4f3c\u4e8e\u8bbe\u8ba1\u84dd\u56fe\uff09\uff1aclass \u7c7b\u540d{&#8230;}\u3002<br \/>\n\u901a\u8fc7\u4f7f\u7528&#8221;extends&#8221;\u5173\u952e\u5b57\uff0c\u6211\u4eec\u53ef\u4ee5\u7ee7\u627f\u4e00\u4e2a\u539f\u59cb\u7c7b\uff0c\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7c7b\uff1aclass \u7c7b\u540d extends \u7ee7\u627f\u7684\u7c7b\u540d{&#8230;}\u3002<\/p>\n<h5>\u4ee5\u4e0b\u7684\u4ee3\u78bc\u662f\u7528\u65bc\u5efa\u69cb\u51fd\u5f0f\u5167\u90e8\u4f7f\u7528\u7684\u3002<\/h5>\n<p>\u4f7f\u7528new\u5173\u952e\u5b57\u52a0\u7c7b\u540d()\u6765\u751f\u6210\u4e00\u4e2a\u7c7b\u7684\u5bf9\u8c61\u3002<br \/>\n\u4f7f\u7528constructor(){&#8230;}\u5728\u5b9e\u4f8b\u751f\u6210\u65f6\u6dfb\u52a0\u5904\u7406\u903b\u8f91\u3002<br \/>\n\u4f7f\u7528this.property=value\u6765\u7ed9\u5b9e\u4f8b\u6dfb\u52a0\u5c5e\u6027\u548c\u503c\u3002<br \/>\n\u4f7f\u7528super()\u8c03\u7528()\u5185\u7684\u7236\u6784\u9020\u51fd\u6570\u3002<\/p>\n<h3>\u2164\u53ef\u4ee5\u7528\u4e2d\u6587\u8fdb\u884c\u4f18\u5316\u3002<\/h3>\n<h5>\u8fdb\u53e3\u548c\u51fa\u53e3<\/h5>\n<p>\u7528 `export default \u7c7b\u540d;` \u6765\u51c6\u5907\u4f7f\u5176\u4ed6\u6587\u4ef6\u53ef\u4ee5\u4f7f\u7528\u8be5\u7c7b\u3002<br \/>\n\u4f7f\u7528 `import \u7c7b\u540d from &#8220;.\/\u6587\u4ef6\u540d&#8221;;` \u6765\u5bfc\u5165\u51c6\u5907\u597d\u7684\u6587\u4ef6\u3002<br \/>\n\u5982\u679c\u76ee\u5f55\u4e0d\u540c\uff0c\u5219\u4f7f\u7528 `import \u7c7b\u540d from &#8220;..\/\u76ee\u5f55\u540d\/\u6587\u4ef6\u540d&#8221;;`\u3002<br \/>\n\u6b64\u65f6\u6587\u4ef6\u540d\u672b\u5c3e\u7684 .js \u53ef\u4ee5\u7701\u7565\u3002<\/p>\n<h6>\u5728\u4e0a\u8ff0\u65b9\u6cd5\u4e2d\uff0c\u53ea\u80fd\u4f7f\u7528\u4e00\u4e2a\u6587\u4ef6\u8fdb\u884c\u4e00\u6b21\u5b9a\u4e49\u3002<\/h6>\n<h6>\u5982\u679c\u60f3\u8981\u5b9a\u4e49\u591a\u4e2a\u9009\u9879\uff0c\u53ef\u4f7f\u7528\u547d\u540d\u5bfc\u51fa\u3002<\/h6>\n<p>\u4ee5\u4e0b\u662f\u5bf9\u539f\u6587\u7684\u4e2d\u6587\u672c\u5730\u5316\u7ffb\u8bd1\uff1a<br \/>\n&#8211; \u4f7f\u7528 `export {\u7c7b\u540d1, \u7c7b\u540d2, \u7c7b\u540d3&#8230;};` \u8fdb\u884c\u547d\u540d\u5bfc\u51fa\u3002<br \/>\n&#8211; \u4f7f\u7528 `import {\u7c7b\u540d1, \u7c7b\u540d2, \u7c7b\u540d3&#8230;} from &#8220;.\/\u6587\u4ef6\u540d&#8221;;` \u8fdb\u884c\u547d\u540d\u5bfc\u5165\u3002<\/p>\n<h5>\u5176\u4ed6<\/h5>\n<p>\u5728\u6211\u7684\u7a0b\u5e8f\u4e2d\u4f7f\u7528import\u5e38\u91cf\u540d\u81ea\u201c\u5305\u540d;\u201d\u5bfc\u5165\u5305\u3002<\/p>\n<h3>\u2165 &#8211; \u516d<\/h3>\n<h5>\u67e5\u627e\u65b9\u6cd5<\/h5>\n<p>\u53d6\u51fa\u7b26\u5408\u56de\u8c03\u51fd\u6570\u5904\u7406\u7684\u6761\u4ef6\u8868\u8fbe\u5f0f\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n<p>\uff08ex1\uff09<br \/>\nconst numbers = [1, 3, 5, 7, 9];<br \/>\nconst foundNumber = findNumber(numbers);<br \/>\nconsole.log(foundNumber);<\/p>\n<p>\u627e\u5230\u6570\u503c\u7684\u51fd\u6570<br \/>\nfunction findNumber(numbers) {<br \/>\nfor (let i = 0; i &lt; numbers.length; i++) {<br \/>\nif (numbers[i] % 3 === 0) {<br \/>\nreturn numbers[i];<br \/>\n}<br \/>\n}<br \/>\nreturn null;<br \/>\n}<\/p>\n<p>\u8f93\u51fa\uff1a<br \/>\n3<\/p>\n<p>\uff08\u9009\u98791\uff09<br \/>\nconst characters = [<br \/>\n{id: 1, name: &#8220;\u306b\u3093\u3058\u3083\u308f\u3093\u3053&#8221;, age: 6},<br \/>\n{id: 2, name: &#8220;\u30d9\u30a4\u30d3\u30fc\u308f\u3093\u3053&#8221;, age: 2},<br \/>\n{id: 3, name: &#8220;\u3072\u3064\u3058\u4ed9\u4eba&#8221;, age: 100},<br \/>\n{id: 4, name: &#8220;\u3068\u308a\u305a\u304d\u3093&#8221;, age: 21}<br \/>\n];<br \/>\nconst foundCharacter = characters.find((character)=&gt;{return character.id===3});<br \/>\nconsole.log(foundCharacter);<br \/>\n\u63a7\u5236\u53f0\u8f93\u51fa\uff1a\u300c{id: 3, name: &#8220;\u3072\u3064\u3058\u4ed9\u4eba&#8221;, age: 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