{"id":251,"date":"2020-02-04T19:58:05","date_gmt":"2020-02-04T11:58:05","guid":{"rendered":"https:\/\/blog.cqdefxxx.com\/?p=251"},"modified":"2020-02-04T19:58:05","modified_gmt":"2020-02-04T11:58:05","slug":"%e5%bc%ba%e5%88%b6%e7%b1%bb%e5%9e%8b%e8%bd%ac%e6%8d%a2","status":"publish","type":"post","link":"https:\/\/blog.viter.top\/index.php\/2020\/02\/04\/%e5%bc%ba%e5%88%b6%e7%b1%bb%e5%9e%8b%e8%bd%ac%e6%8d%a2\/","title":{"rendered":"\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362"},"content":{"rendered":"<pre class=\"pure-highlightjs\"><code class=\"\">&lt;!DOCTYPE html&gt;\n&lt;html&gt;\n\t&lt;head&gt;\n\t\t&lt;meta charset=\"UTF-8\"&gt;\n\t\t&lt;title&gt;&lt;\/title&gt;\n\t\t&lt;script type=\"text\/javascript\"&gt;\n\t\t\t\n\t\t\t\/*\n\t\t\t * \u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\n\t\t\t * \t- \u6307\u5c06\u4e00\u4e2a\u6570\u636e\u7c7b\u578b\u5f3a\u5236\u8f6c\u6362\u4e3a\u5176\u4ed6\u7684\u6570\u636e\u7c7b\u578b\n\t\t\t * \t- \u7c7b\u578b\u8f6c\u6362\u4e3b\u8981\u6307\uff0c\u5c06\u5176\u4ed6\u7684\u6570\u636e\u7c7b\u578b\uff0c\u8f6c\u6362\u4e3a\n\t\t\t * \t\tString Number Boolean\n\t\t\t * \t\t\n\t\t\t *\/\n\t\t\t\n\t\t\t\/*\n\t\t\t * \u5c06\u5176\u4ed6\u7684\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u4e3aString\n\t\t\t * \t\u65b9\u5f0f\u4e00\uff1a\n\t\t\t * \t\t- \u8c03\u7528\u88ab\u8f6c\u6362\u6570\u636e\u7c7b\u578b\u7684toString()\u65b9\u6cd5\n\t\t\t * \t\t- \u8be5\u65b9\u6cd5\u4e0d\u4f1a\u5f71\u54cd\u5230\u539f\u53d8\u91cf\uff0c\u5b83\u4f1a\u5c06\u8f6c\u6362\u7684\u7ed3\u679c\u8fd4\u56de\n\t\t\t * \t\t- \u4f46\u662f\u6ce8\u610f\uff1anull\u548cundefined\u8fd9\u4e24\u4e2a\u503c\u6ca1\u6709toString()\u65b9\u6cd5\uff0c\n\t\t\t * \t\t\t\u5982\u679c\u8c03\u7528\u4ed6\u4eec\u7684\u65b9\u6cd5\uff0c\u4f1a\u62a5\u9519\n\t\t\t * \n\t\t\t *  \u65b9\u5f0f\u4e8c\uff1a\n\t\t\t * \t\t- \u8c03\u7528String()\u51fd\u6570\uff0c\u5e76\u5c06\u88ab\u8f6c\u6362\u7684\u6570\u636e\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u51fd\u6570\n\t\t\t * \t\t- \u4f7f\u7528String()\u51fd\u6570\u505a\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u65f6\uff0c\n\t\t\t * \t\t\t\u5bf9\u4e8eNumber\u548cBoolean\u5b9e\u9645\u4e0a\u5c31\u662f\u8c03\u7528\u7684toString()\u65b9\u6cd5\n\t\t\t * \t\t\t\u4f46\u662f\u5bf9\u4e8enull\u548cundefined\uff0c\u5c31\u4e0d\u4f1a\u8c03\u7528toString()\u65b9\u6cd5\n\t\t\t * \t\t\t\t\u5b83\u4f1a\u5c06 null \u76f4\u63a5\u8f6c\u6362\u4e3a \"null\"\n\t\t\t * \t\t\t\t\u5c06 undefined \u76f4\u63a5\u8f6c\u6362\u4e3a \"undefined\"\n\t\t\t * \n\t\t\t *\/\n\t\t\t\n\t\t\tvar a = 123;\n\t\t\t\n\t\t\t\/\/\u8c03\u7528a\u7684toString()\u65b9\u6cd5\n\t\t\t\/\/\u8c03\u7528xxx\u7684yyy()\u65b9\u6cd5\uff0c\u5c31\u662fxxx.yyy()\n\t\t\ta = a.toString();\n\t\t\t\n\t\t\ta = true;\n\t\t\ta = a.toString();\n\t\t\t\n\t\t\ta = null;\n\t\t\t\/\/a = a.toString(); \/\/\u62a5\u9519\n\t\t\t\n\t\t\ta = undefined;\n\t\t\t\/\/a = a.toString(); \/\/\u62a5\u9519\n\t\t\t\n\t\t\t\n\t\t\ta = 123;\n\t\t\t\n\t\t\t\/\/\u8c03\u7528String()\u51fd\u6570\uff0c\u6765\u5c06a\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\n\t\t\ta = String(a);\n\t\t\t\n\t\t\ta = null;\n\t\t\ta = String(a);\n\t\t\t\n\t\t\ta = undefined;\n\t\t\ta = String(a);\n\t\t\t\n\t\t\tconsole.log(typeof a);\n\t\t\tconsole.log(a);\n\t\t\t\n\t\t\t\n\t\t\t\n\t\t\t\n\t\t\t\n\t\t&lt;\/script&gt;\n\t&lt;\/head&gt;\n\t&lt;body&gt;\n\t&lt;\/body&gt;\n&lt;\/html&gt;\n<\/code><\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;meta charset= &#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[4],"_links":{"self":[{"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/posts\/251"}],"collection":[{"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/comments?post=251"}],"version-history":[{"count":0,"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/posts\/251\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/media?parent=251"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/categories?post=251"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/tags?post=251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}