{"id":261,"date":"2020-02-04T20:32:58","date_gmt":"2020-02-04T12:32:58","guid":{"rendered":"https:\/\/blog.cqdefxxx.com\/?p=261"},"modified":"2020-02-04T20:32:58","modified_gmt":"2020-02-04T12:32:58","slug":"%e8%bd%ac%e6%8d%a2%e4%b8%baboolean","status":"publish","type":"post","link":"https:\/\/blog.viter.top\/index.php\/2020\/02\/04\/%e8%bd%ac%e6%8d%a2%e4%b8%baboolean\/","title":{"rendered":"\u8f6c\u6362\u4e3aBoolean"},"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 * \u5c06\u5176\u4ed6\u7684\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u4e3aBoolean\n\t\t\t * \t- \u4f7f\u7528Boolean()\u51fd\u6570\n\t\t\t * \t\t- \u6570\u5b57 ---&gt; \u5e03\u5c14\n\t\t\t * \t\t\t- \u9664\u4e860\u548cNaN\uff0c\u5176\u4f59\u7684\u90fd\u662ftrue\n\t\t\t * \n\t\t\t * \t\t- \u5b57\u7b26\u4e32 ---&gt; \u5e03\u5c14\n\t\t\t * \t\t\t- \u9664\u4e86\u7a7a\u4e32\uff0c\u5176\u4f59\u7684\u90fd\u662ftrue\n\t\t\t * \n\t\t\t * \t\t- null\u548cundefined\u90fd\u4f1a\u8f6c\u6362\u4e3afalse\n\t\t\t * \n\t\t\t * \t\t- \u5bf9\u8c61\u4e5f\u4f1a\u8f6c\u6362\u4e3atrue\n\t\t\t * \t\t\n\t\t\t *\/\n\t\t\t\n\t\t\tvar a = 123; \/\/true\n\t\t\ta = -123; \/\/true\n\t\t\ta = 0; \/\/false\n\t\t\ta = Infinity; \/\/true\n\t\t\ta = NaN; \/\/false\n\t\t\t\n\t\t\t\/\/\u8c03\u7528Boolean()\u51fd\u6570\u6765\u5c06a\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c\n\t\t\ta = Boolean(a);\n\t\t\t\n\t\t\ta = \" \";\n\t\t\t\n\t\t\ta = Boolean(a);\n\t\t\t\n\t\t\ta = null; \/\/false\n\t\t\ta = Boolean(a);\n\t\t\t\n\t\t\ta = undefined; \/\/false\n\t\t\ta = Boolean(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&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\/261"}],"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=261"}],"version-history":[{"count":0,"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/posts\/261\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/media?parent=261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/categories?post=261"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/tags?post=261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}