{"id":306,"date":"2020-02-04T21:18:32","date_gmt":"2020-02-04T13:18:32","guid":{"rendered":"https:\/\/blog.cqdefxxx.com\/?p=306"},"modified":"2020-02-04T21:18:32","modified_gmt":"2020-02-04T13:18:32","slug":"%e5%87%bd%e6%95%b0%e8%bf%94%e5%9b%9e%e5%80%bc","status":"publish","type":"post","link":"https:\/\/blog.viter.top\/index.php\/2020\/02\/04\/%e5%87%bd%e6%95%b0%e8%bf%94%e5%9b%9e%e5%80%bc\/","title":{"rendered":"\u51fd\u6570\u8fd4\u56de\u503c"},"content":{"rendered":"

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<!DOCTYPE html>\n<html>\n\t<head>\n\t\t<meta charset=\"utf-8\" \/>\n\t\t<title><\/title>\n\t\t<script type=\"text\/javascript\">\n\t\t\t\n\t\t\t\/*\n\t\t\t * \u521b\u5efa\u4e00\u4e2a\u51fd\u6570\uff0c\u7528\u6765\u8ba1\u7b97\u4e09\u4e2a\u6570\u7684\u548c\n\t\t\t * \n\t\t\t * \u53ef\u4ee5\u4f7f\u7528 return \u6765\u8bbe\u7f6e\u51fd\u6570\u7684\u8fd4\u56de\u503c\n\t\t\t * \t\u8bed\u6cd5\uff1a\n\t\t\t * \t\treturn \u503c\n\t\t\t * \n\t\t\t * \treturn\u540e\u7684\u503c\u5c06\u4f1a\u4f1a\u4f5c\u4e3a\u51fd\u6570\u7684\u6267\u884c\u7ed3\u679c\u8fd4\u56de\uff0c\n\t\t\t * \t\t\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\uff0c\u6765\u63a5\u6536\u8be5\u7ed3\u679c\n\t\t\t * \n\t\t\t *  \u5728\u51fd\u6570\u4e2dreturn\u540e\u7684\u8bed\u53e5\u90fd\u4e0d\u4f1a\u6267\u884c\n\t\t\t * \n\t\t\t * \t\u5982\u679creturn\u8bed\u53e5\u540e\u4e0d\u8ddf\u4efb\u4f55\u503c\u5c31\u76f8\u5f53\u4e8e\u8fd4\u56de\u4e00\u4e2aundefined\uff0c\n\t\t\t * \t\u5982\u679c\u51fd\u6570\u4e2d\u4e0d\u5199return\uff0c\u5219\u4e5f\u4f1a\u8fd4\u56deundefined\n\t\t\t * \n\t\t\t * \treturn\u540e\u53ef\u4ee5\u8ddf\u4efb\u610f\u7c7b\u578b\u7684\u503c\n\t\t\t * \n\t\t\t *\/\n\t\t\tfunction sum(a , b , c){\n\t\t\t\t\/\/alert(a + b +c);\n\t\t\t\t\n\t\t\t\tvar d = a + b + c;\n\t\t\t\t\n\t\t\t\treturn d;\n\t\t\t\t\n\t\t\t\t\/\/return undefined;\n\t\t\t\t\n\t\t\t}\n\t\t\t\n\t\t\t\/\/\u8c03\u7528\u51fd\u6570\n\t\t\t\/\/\u53d8\u91cfresult\u7684\u503c\u5c31\u662f\u51fd\u6570\u7684\u6267\u884c\u7ed3\u679c\n\t\t\t\/\/\u51fd\u6570\u8fd4\u56de\u4ec0\u4e48result\u7684\u503c\u5c31\u662f\u4ec0\u4e48\n\t\t\tvar result = sum(4,7,8);\n\t\t\t\n\t\t\t\/\/var result = alert(\"hello\");\n\t\t\t\n\t\t\tconsole.log(\"result = \"+result);\n\t\t\t\n\t\t\t\n\t\t<\/script>\n\t<\/head>\n\t<body>\n\t\t\n\t<\/body>\n<\/html>\n<\/code><\/pre>\n
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<!DOCTYPE html>\n<html>\n\t<head>\n\t\t<meta charset=\"UTF-8\">\n\t\t<title><\/title>\n\t\t<script type=\"text\/javascript\">\n\t\t\t\n\t\t\tfunction fun(){\n\t\t\t\talert(\"\u51fd\u6570\u8981\u6267\u884c\u4e86~~~~\");\n\t\t\t\t\n\t\t\t\tfor(var i=0 ; i<5 ; i++){\n\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\tif(i == 2){\n\t\t\t\t\t\t\/\/\u4f7f\u7528break\u53ef\u4ee5\u9000\u51fa\u5f53\u524d\u7684\u5faa\u73af\n\t\t\t\t\t\t\/\/break;\n\t\t\t\t\t\t\n\t\t\t\t\t\t\/\/continue\u7528\u4e8e\u8df3\u8fc7\u5f53\u6b21\u5faa\u73af\n\t\t\t\t\t\t\/\/continue;\n\t\t\t\t\t\t\n\t\t\t\t\t\t\/\/\u4f7f\u7528return\u53ef\u4ee5\u7ed3\u675f\u6574\u4e2a\u51fd\u6570\n\t\t\t\t\t\t\/\/return;\n\t\t\t\t\t}\n\t\t\t\t\t\n\t\t\t\t\tconsole.log(i);\n\t\t\t\t}\n\t\t\t\t\n\t\t\t\talert(\"\u51fd\u6570\u6267\u884c\u5b8c\u4e86~~~~\");\n\t\t\t}\n\t\t\t\n\t\t\t\/\/fun();\n\t\t\t\n\t\t\t\/*\n\t\t\t * \u8fd4\u56de\u503c\u53ef\u4ee5\u662f\u4efb\u610f\u7684\u6570\u636e\u7c7b\u578b\n\t\t\t * \t\u4e5f\u53ef\u4ee5\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4e5f\u53ef\u4ee5\u662f\u4e00\u4e2a\u51fd\u6570\n\t\t\t *\/\n\t\t\tfunction fun2(){\n\t\t\t\t\n\t\t\t\t\/\/\u8fd4\u56de\u4e00\u4e2a\u5bf9\u8c61\n\t\t\t\treturn {name:\"\u6c99\u548c\u5c1a\"};\n\t\t\t}\n\t\t\t\n\t\t\tvar a = fun2();\n\t\t\t\n\t\t\t\/\/console.log(\"a = \"+a);\n\t\t\t\n\t\t\tfunction fun3(){\n\t\t\t\t\/\/\u5728\u51fd\u6570\u5185\u90e8\u518d\u58f0\u660e\u4e00\u4e2a\u51fd\u6570\n\t\t\t\tfunction fun4(){\n\t\t\t\t\talert(\"\u6211\u662ffun4\");\n\t\t\t\t}\n\t\t\t\t\n\t\t\t\t\/\/\u5c06fun4\u51fd\u6570\u5bf9\u8c61\u4f5c\u4e3a\u8fd4\u56de\u503c\u8fd4\u56de\n\t\t\t\treturn fun4;\n\t\t\t}\n\t\t\t\n\t\t\ta = fun3();\n\t\t\t\/\/console.log(a);\n\t\t\t\/\/a();\n\t\t\tfun3()();\n\t\t\t\n\t\t\t\n\t\t<\/script>\n\t<\/head>\n\t<body>\n\t<\/body>\n<\/html>\n<\/code><\/pre>\n
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