{"id":343,"date":"2020-02-04T22:54:13","date_gmt":"2020-02-04T14:54:13","guid":{"rendered":"https:\/\/blog.cqdefxxx.com\/?p=343"},"modified":"2020-02-04T22:54:13","modified_gmt":"2020-02-04T14:54:13","slug":"%e5%87%bd%e6%95%b0%e4%b8%adcall%e5%92%8capply%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/blog.viter.top\/index.php\/2020\/02\/04\/%e5%87%bd%e6%95%b0%e4%b8%adcall%e5%92%8capply%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u51fd\u6570\u4e2dcall()\u548capply()\u65b9\u6cd5"},"content":{"rendered":"<pre class=\"pure-highlightjs\"><code class=\"\">&lt;!DOCTYPE html&gt;\n&lt;html&gt;\n\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\tfunction fun(a,b) {\n\t\t\t\tconsole.log(\"a = \"+a);\n\t\t\t\tconsole.log(\"b = \"+b);\n\t\t\t\t\/\/alert(this);\n\t\t\t}\n\t\t\t\n\t\t\tvar obj = {\n\t\t\t\tname: \"obj\",\n\t\t\t\tsayName:function(){\n\t\t\t\t\talert(this.name);\n\t\t\t\t}\n\t\t\t};\n\n\t\t\t\/*\n\t\t\t * call()\u548capply()\n\t\t\t * \t- \u8fd9\u4e24\u4e2a\u65b9\u6cd5\u90fd\u662f\u51fd\u6570\u5bf9\u8c61\u7684\u65b9\u6cd5\uff0c\u9700\u8981\u901a\u8fc7\u51fd\u6570\u5bf9\u8c61\u6765\u8c03\u7528\n\t\t\t * \t- \u5f53\u5bf9\u51fd\u6570\u8c03\u7528call()\u548capply()\u90fd\u4f1a\u8c03\u7528\u51fd\u6570\u6267\u884c\n\t\t\t * \t- \u5728\u8c03\u7528call()\u548capply()\u53ef\u4ee5\u5c06\u4e00\u4e2a\u5bf9\u8c61\u6307\u5b9a\u4e3a\u7b2c\u4e00\u4e2a\u53c2\u6570\n\t\t\t * \t\t\u6b64\u65f6\u8fd9\u4e2a\u5bf9\u8c61\u5c06\u4f1a\u6210\u4e3a\u51fd\u6570\u6267\u884c\u65f6\u7684this\n\t\t\t * \t- call()\u65b9\u6cd5\u53ef\u4ee5\u5c06\u5b9e\u53c2\u5728\u5bf9\u8c61\u4e4b\u540e\u4f9d\u6b21\u4f20\u9012\n\t\t\t * \t- apply()\u65b9\u6cd5\u9700\u8981\u5c06\u5b9e\u53c2\u5c01\u88c5\u5230\u4e00\u4e2a\u6570\u7ec4\u4e2d\u7edf\u4e00\u4f20\u9012\n\t\t\t * \n\t\t\t * \t- this\u7684\u60c5\u51b5\uff1a\n\t\t\t * \t\t1.\u4ee5\u51fd\u6570\u5f62\u5f0f\u8c03\u7528\u65f6\uff0cthis\u6c38\u8fdc\u90fd\u662fwindow\n\t\t\t * \t\t2.\u4ee5\u65b9\u6cd5\u7684\u5f62\u5f0f\u8c03\u7528\u65f6\uff0cthis\u662f\u8c03\u7528\u65b9\u6cd5\u7684\u5bf9\u8c61\n\t\t\t * \t\t3.\u4ee5\u6784\u9020\u51fd\u6570\u7684\u5f62\u5f0f\u8c03\u7528\u65f6\uff0cthis\u662f\u65b0\u521b\u5efa\u7684\u90a3\u4e2a\u5bf9\u8c61\n\t\t\t * \t\t4.\u4f7f\u7528call\u548capply\u8c03\u7528\u65f6\uff0cthis\u662f\u6307\u5b9a\u7684\u90a3\u4e2a\u5bf9\u8c61\n\t\t\t *\/\n\t\t\t\n\t\t\t\/\/fun.call(obj,2,3);\n\t\t\tfun.apply(obj,[2,3]);\n\n\t\t\t\n\n\t\t\tvar obj2 = {\n\t\t\t\tname: \"obj2\"\n\t\t\t};\n\n\t\t\t\/*fun.apply();\n\t\t\tfun.call();\n\t\t\tfun();*\/\n\n\t\t\t\/\/fun.call(obj);\n\t\t\t\/\/fun.apply(obj);\n\n\t\t\t\/\/fun();\n\t\t\t\n\t\t\t\/\/obj.sayName.apply(obj2);\n\t\t&lt;\/script&gt;\n\t&lt;\/head&gt;\n\n\t&lt;body&gt;\n\t&lt;\/body&gt;\n\n&lt;\/html&gt;<\/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\/343"}],"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=343"}],"version-history":[{"count":0,"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/posts\/343\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/media?parent=343"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/categories?post=343"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.viter.top\/index.php\/wp-json\/wp\/v2\/tags?post=343"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}