{"id":1384,"date":"2024-06-02T22:32:49","date_gmt":"2024-06-02T22:32:49","guid":{"rendered":""},"modified":"2024-06-05T03:10:11","modified_gmt":"2024-06-04T19:10:11","slug":"javascript%e6%b7%b1%e5%85%a5%e4%b9%8b%e5%8f%82%e6%95%b0%e6%8c%89%e5%80%bc%e4%bc%a0%e9%80%92","status":"publish","type":"post","link":"https:\/\/www.lccc.top\/?p=1384","title":{"rendered":"JavaScript\u6df1\u5165\u4e4b\u53c2\u6570\u6309\u503c\u4f20\u9012"},"content":{"rendered":"\n

\u5b9a\u4e49<\/h2>\n

\u5728\u300aJavaScript\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u300b\u7b2c\u4e09\u7248 4.1.3\uff0c\u8bb2\u5230\u4f20\u9012\u53c2\u6570\uff1a<\/p>\n

\n

ECMAScript\u4e2d\u6240\u6709\u51fd\u6570\u7684\u53c2\u6570\u90fd\u662f\u6309\u503c\u4f20\u9012\u7684\u3002<\/p>\n<\/blockquote>\n

\u4ec0\u4e48\u662f\u6309\u503c\u4f20\u9012\u5462\uff1f<\/p>\n

\n

\u4e5f\u5c31\u662f\u8bf4\uff0c\u628a\u51fd\u6570\u5916\u90e8\u7684\u503c\u590d\u5236\u7ed9\u51fd\u6570\u5185\u90e8\u7684\u53c2\u6570\uff0c\u5c31\u548c\u628a\u503c\u4ece\u4e00\u4e2a\u53d8\u91cf\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u53d8\u91cf\u4e00\u6837\u3002<\/p>\n<\/blockquote>\n

\u6309\u503c\u4f20\u9012<\/h2>\n

\u4e3e\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n

<\/p>\n
var<\/span> value<\/span> =<\/span> 1<\/span>;<\/span>\nfunction<\/span> foo<\/span>(<\/span>v<\/span>)<\/span> {<\/span>\n    v<\/span> =<\/span> 2<\/span>;<\/span>\n    console<\/span>.<\/span>log<\/span>(<\/span>v<\/span>)<\/span>;<\/span> \/\/2<\/span>\n}<\/span>\nfoo<\/span>(<\/span>value<\/span>)<\/span>;<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>value<\/span>)<\/span> \/\/ 1<\/span><\/pre>\n<\/div>\n
\u5f88\u597d\u7406\u89e3\uff0c\u5f53\u4f20\u9012 value \u5230\u51fd\u6570 foo \u4e2d\uff0c\u76f8\u5f53\u4e8e\u62f7\u8d1d\u4e86\u4e00\u4efd value\uff0c\u5047\u8bbe\u62f7\u8d1d\u7684\u8fd9\u4efd\u53eb _value\uff0c\u51fd\u6570\u4e2d\u4fee\u6539\u7684\u90fd\u662f _value \u7684\u503c\uff0c\u800c\u4e0d\u4f1a\u5f71\u54cd\u539f\u6765\u7684 value \u503c\u3002<\/p>\n
\u5f15\u7528\u4f20\u9012\uff1f<\/h2>\n
\u62f7\u8d1d\u867d\u7136\u5f88\u597d\u7406\u89e3\uff0c\u4f46\u662f\u5f53\u503c\u662f\u4e00\u4e2a\u590d\u6742\u7684\u6570\u636e\u7ed3\u6784\u7684\u65f6\u5019\uff0c\u62f7\u8d1d\u5c31\u4f1a\u4ea7\u751f\u6027\u80fd\u4e0a\u7684\u95ee\u9898\u3002<\/p>\n
\u6240\u4ee5\u8fd8\u6709\u53e6\u4e00\u79cd\u4f20\u9012\u65b9\u5f0f\u53eb\u505a\u6309\u5f15\u7528\u4f20\u9012\u3002<\/p>\n
\u6240\u8c13\u6309\u5f15\u7528\u4f20\u9012\uff0c\u5c31\u662f\u4f20\u9012\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u51fd\u6570\u5185\u90e8\u5bf9\u53c2\u6570\u7684\u4efb\u4f55\u6539\u53d8\u90fd\u4f1a\u5f71\u54cd\u8be5\u5bf9\u8c61\u7684\u503c\uff0c\u56e0\u4e3a\u4e24\u8005\u5f15\u7528\u7684\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n
\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
<\/p>\n
var<\/span> obj<\/span> =<\/span> {<\/span>\n    value<\/span>: 1<\/span>\n}<\/span>;<\/span>\nfunction<\/span> foo<\/span>(<\/span>o<\/span>)<\/span> {<\/span>\n    o<\/span>.<\/span>value<\/span> =<\/span> 2<\/span>;<\/span>\n    console<\/span>.<\/span>log<\/span>(<\/span>o<\/span>.<\/span>value<\/span>)<\/span>;<\/span> \/\/2<\/span>\n}<\/span>\nfoo<\/span>(<\/span>obj<\/span>)<\/span>;<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>obj<\/span>.<\/span>value<\/span>)<\/span> \/\/ 2<\/span><\/pre>\n<\/div>\n
\u54ce\uff0c\u4e0d\u5bf9\u554a\uff0c\u8fde\u6211\u4eec\u7684\u7ea2\u5b9d\u4e66\u90fd\u8bf4\u4e86 ECMAScript \u4e2d\u6240\u6709\u51fd\u6570\u7684\u53c2\u6570\u90fd\u662f\u6309\u503c\u4f20\u9012\u7684\uff0c\u8fd9\u600e\u4e48\u80fd\u6309”\u5f15\u7528\u4f20\u9012”\u6210\u529f\u5462\uff1f<\/p>\n
\u800c\u8fd9\u7a76\u7adf\u662f\u4e0d\u662f\u5f15\u7528\u4f20\u9012\u5462\uff1f<\/p>\n
\u7b2c\u4e09\u79cd\u4f20\u9012\u65b9\u5f0f<\/h2>\n
\u4e0d\u6025\uff0c\u8ba9\u6211\u4eec\u518d\u770b\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
<\/p>\n
var<\/span> obj<\/span> =<\/span> {<\/span>\n    value<\/span>: 1<\/span>\n}<\/span>;<\/span>\nfunction<\/span> foo<\/span>(<\/span>o<\/span>)<\/span> {<\/span>\n    o<\/span> =<\/span> 2<\/span>;<\/span>\n    console<\/span>.<\/span>log<\/span>(<\/span>o<\/span>)<\/span>;<\/span> \/\/2<\/span>\n}<\/span>\nfoo<\/span>(<\/span>obj<\/span>)<\/span>;<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>obj<\/span>.<\/span>value<\/span>)<\/span> \/\/ 1<\/span><\/pre>\n<\/div>\n
\u5982\u679c JavaScript \u91c7\u7528\u7684\u662f\u5f15\u7528\u4f20\u9012\uff0c\u5916\u5c42\u7684\u503c\u4e5f\u4f1a\u88ab\u4fee\u6539\u5450\uff0c\u8fd9\u600e\u4e48\u53c8\u6ca1\u88ab\u6539\u5462\uff1f\u6240\u4ee5\u771f\u7684\u4e0d\u662f\u5f15\u7528\u4f20\u9012\u5417\uff1f<\/p>\n
\u8fd9\u5c31\u8981\u8bb2\u5230\u5176\u5b9e\u8fd8\u6709\u7b2c\u4e09\u79cd\u4f20\u9012\u65b9\u5f0f\uff0c\u53eb\u6309\u5171\u4eab\u4f20\u9012\u3002<\/p>\n
\u800c\u5171\u4eab\u4f20\u9012\u662f\u6307\uff0c\u5728\u4f20\u9012\u5bf9\u8c61\u7684\u65f6\u5019\uff0c\u4f20\u9012\u5bf9\u8c61\u7684\u5f15\u7528\u7684\u526f\u672c\u3002<\/p>\n
\u6ce8\u610f\uff1a \u6309\u5f15\u7528\u4f20\u9012\u662f\u4f20\u9012\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u800c\u6309\u5171\u4eab\u4f20\u9012\u662f\u4f20\u9012\u5bf9\u8c61\u7684\u5f15\u7528\u7684\u526f\u672c\uff01<\/strong><\/p>\n
\u6240\u4ee5\u4fee\u6539 o.value\uff0c\u53ef\u4ee5\u901a\u8fc7\u5f15\u7528\u627e\u5230\u539f\u503c\uff0c\u4f46\u662f\u76f4\u63a5\u4fee\u6539 o\uff0c\u5e76\u4e0d\u4f1a\u4fee\u6539\u539f\u503c\u3002\u6240\u4ee5\u7b2c\u4e8c\u4e2a\u548c\u7b2c\u4e09\u4e2a\u4f8b\u5b50\u5176\u5b9e\u90fd\u662f\u6309\u5171\u4eab\u4f20\u9012\u3002<\/p>\n
\u6700\u540e\uff0c\u4f60\u53ef\u4ee5\u8fd9\u6837\u7406\u89e3\uff1a<\/p>\n
\u53c2\u6570\u5982\u679c\u662f\u57fa\u672c\u7c7b\u578b\u662f\u6309\u503c\u4f20\u9012\uff0c\u5982\u679c\u662f\u5f15\u7528\u7c7b\u578b\u6309\u5171\u4eab\u4f20\u9012\u3002<\/p>\n
\u4f46\u662f\u56e0\u4e3a\u62f7\u8d1d\u526f\u672c\u4e5f\u662f\u4e00\u79cd\u503c\u7684\u62f7\u8d1d\uff0c\u6240\u4ee5\u5728\u9ad8\u7a0b\u4e2d\u4e5f\u76f4\u63a5\u8ba4\u4e3a\u662f\u6309\u503c\u4f20\u9012\u4e86\u3002<\/p>\n
\u6240\u4ee5\uff0c\u9ad8\u7a0b\uff0c\u8c01\u53eb\u4f60\u662f\u7ea2\u5b9d\u4e66\u561e\uff01<\/p>\n
\u4e0b\u4e00\u7bc7\u6587\u7ae0<\/h2>\n
JavaScript\u6df1\u5165\u4e4bcall\u548capply\u7684\u6a21\u62df\u5b9e\u73b0<\/a><\/p>\n
\u6df1\u5165\u7cfb\u5217<\/h2>\n
JavaScript\u6df1\u5165\u7cfb\u5217\u76ee\u5f55\u5730\u5740\uff1ahttps:\/\/github.com\/mqyqingfeng\/Blog<\/a>\u3002<\/p>\n
JavaScript\u6df1\u5165\u7cfb\u5217\u9884\u8ba1\u5199\u5341\u4e94\u7bc7\u5de6\u53f3\uff0c\u65e8\u5728\u5e2e\u5927\u5bb6\u634b\u987aJavaScript\u5e95\u5c42\u77e5\u8bc6\uff0c\u91cd\u70b9\u8bb2\u89e3\u5982\u539f\u578b\u3001\u4f5c\u7528\u57df\u3001\u6267\u884c\u4e0a\u4e0b\u6587\u3001\u53d8\u91cf\u5bf9\u8c61\u3001this\u3001\u95ed\u5305\u3001\u6309\u503c\u4f20\u9012\u3001call\u3001apply\u3001bind\u3001new\u3001\u7ee7\u627f\u7b49\u96be\u70b9\u6982\u5ff5\u3002<\/p>\n
\u5982\u679c\u6709\u9519\u8bef\u6216\u8005\u4e0d\u4e25\u8c28\u7684\u5730\u65b9\uff0c\u8bf7\u52a1\u5fc5\u7ed9\u4e88\u6307\u6b63\uff0c\u5341\u5206\u611f\u8c22\u3002\u5982\u679c\u559c\u6b22\u6216\u8005\u6709\u6240\u542f\u53d1\uff0c\u6b22\u8fcestar\uff0c\u5bf9\u4f5c\u8005\u4e5f\u662f\u4e00\u79cd\u9f13\u52b1\u3002<\/p>\n<\/td>\n
\u6587\u7ae0\u8f6c\u8f7d\u81eahttps:\/\/github.com\/mqyqingfeng\/Blog\/issues\/10<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b9a\u4e49 \u5728\u300aJavaScript\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u300b\u7b2c\u4e09\u7248 4.1.3\uff0c\u8bb2\u5230\u4f20\u9012\u53c2\u6570\uff1a ECMAScript\u4e2d\u6240\u6709\u51fd\u6570\u7684\u53c2\u6570\u90fd\u662f\u6309\u503c\u4f20\u9012\u7684\u3002 \u4ec0\u4e48\u662f\u6309\u503c\u4f20\u9012\u5462\uff1f \u4e5f\u5c31\u662f…<\/p>\n
 Read More  Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1384","post","type-post","status-publish","format-standard","hentry","category-learn"],"_links":{"self":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1384"}],"collection":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1384"}],"version-history":[{"count":1,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1384\/revisions"}],"predecessor-version":[{"id":1497,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1384\/revisions\/1497"}],"wp:attachment":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1384"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1384"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1384"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}