{"id":3062,"date":"2014-09-22T00:12:37","date_gmt":"2014-09-21T16:12:37","guid":{"rendered":"https:\/\/sdeno.com\/?p=3062"},"modified":"2017-11-26T00:00:34","modified_gmt":"2017-11-25T16:00:34","slug":"%e6%9e%84%e9%80%a0%e5%87%bd%e6%95%b0%e3%80%81%e5%8e%9f%e5%9e%8b%e5%87%bd%e6%95%b0%e5%92%8c%e5%8e%9f%e5%9e%8b%e9%93%be%e7%9a%84%e5%85%b3%e7%b3%bb","status":"publish","type":"post","link":"https:\/\/sdeno.com\/?p=3062","title":{"rendered":"\u6784\u9020\u51fd\u6570\u3001\u539f\u578b\u51fd\u6570\u548c\u539f\u578b\u94fe\u7684\u5173\u7cfb"},"content":{"rendered":"

\u6848\u4f8b\uff1aUntitled-1<\/a><\/p>\n

\u9996\u5148\u770b\u4e0b\u6784\u9020\u51fd\u6570\u7684\u4e00\u4e2a\u7b80\u5355\u4f8b\u5b50\uff1a<\/p>\n

var Box=function(){ \/\/\u58f0\u660e\u4e00\u4e2a\u7c7b
\nthis.name=’\u6211’;
\nthis.age=25;
\nthis.run=function(){
\nreturn this.name+this.age;
\n}
\n}<\/p>\n

var box1 =new Wo(); \/\/\u7c7b\u5b9e\u4f8b\u5316\u6210\u5bf9\u8c61
\nvar box2 =new Wo();
\nalert(p1.run());
\n\u4ee5\u4e0a\u58f0\u660e\u7c7b\u7684\u65b9\u5f0f\u5c31\u53eb\u505a\u6784\u9020\u51fd\u6570\uff0c\u8fd9\u6837\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u5c31\u662f\u5b9e\u4f8b\u5c5e\u6027\u548c\u5b9e\u4f8b\u65b9\u6cd5\u3002
\n\u540c\u65f6new\u4e86\u4e24\u4e2a\u5b9e\u4f8b\u5316\u5bf9\u8c61box1\u548cbox2 \u5b83\u4eec\u7684\u5b9e\u4f8b\u5c5e\u6027\u65b9\u6cd5\u5730\u5740\u90fd\u662f\u72ec\u7acb\u7684\u5982\u56fe\uff1a<\/p>\n

<\/div>
<\/div><\/div><\/div>\"func1\"<\/figure><\/a>\n

 <\/p>\n

\u4f46\u662fnew\u591a\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\u4f1a\u9020\u6210\u8d44\u6e90\u7684\u6d6a\u8d39\u6240\u4ee5\u9700\u8981\u516c\u7528\u4e00\u4e2a\u5730\u5740\uff0c\u8fd9\u65f6\u6211\u4eec\u9700\u8981\u539f\u578b\u51fd\u6570\u3002<\/p>\n

var Box=function(){ \/\/\u58f0\u660e\u4e00\u4e2a\u7c7b
\nthis.prototype.name=’\u6211’;
\nthis.prototype.age=25;
\nthis.prototype.run=function(){
\nreturn this.name+this.age;
\n}
\n}<\/p>\n

var box1 =new Wo(); \/\/\u7c7b\u5b9e\u4f8b\u5316\u6210\u5bf9\u8c61
\nvar box2 =new Wo();
\nalert(p1.run());
\n\u539f\u578b\u51fd\u6570\u53ea\u9700\u8981\u52a0prototype\uff0c\u4ee5\u4e0a\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u5c31\u662f\u539f\u578b\u5c5e\u6027\u548c\u539f\u578b\u65b9\u6cd5\uff0c\u5730\u5740\u662f\u5171\u4eab\u7684\uff0c\u5982\u56fe\uff1a<\/p>\n

 <\/p>\n

<\/div>
<\/div><\/div><\/div>\"func2\"<\/figure><\/a>\n

 <\/p>\n

\u6ca1\u6709\u5b9a\u4e49\u5b9e\u4f8b\u5c5e\u6027\u548c\u65b9\u6cd5\u6240\u4ee5\u662f\u7a7a\u7684\u3002<\/p>\n

\u6ce8\u610f\u5982\u679c\u539f\u578b\u7528\u5b57\u9762\u91cf\u7684\u65b9\u5f0f\u5199\u7b2c\u4e8c\u6b21\u7684\u8bdd\uff0c\u4e4b\u524d\u5199\u7684\u5b57\u9762\u91cf\u539f\u578b\u5173\u7cfb\u5c31\u4f1a\u88ab\u4e2d\u65ad\u3002\u4f8b\u5982
\nBox.prototype={ name:’\u6211’,age:18 };
\nBox.prototype={ sex:’\u7537’}; \/\/\u91cd\u5199\u4e86\u7b2c\u4e8c\u6b21\uff0c\u4e4b\u524d\u5199\u7684Box\u539f\u578b\u4e0d\u4f1a\u88ab\u7ee7\u627f\u3002<\/p>\n

 <\/p>\n

\u6211\u4eec\u6bcf\u521b\u5efa\u4e00\u4e2a(\u6784\u9020)\u51fd\u6570\u7684\u65f6\u5019\u5c31\u9ed8\u8ba4\u5b58\u5728\u4e00\u4e2aprototype\u5bf9\u8c61\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u662f\u7528\u6765\u5b58\u50a8\u5171\u4eab\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u4e0d\u5b58\u5728__proto__\u3002\u5982\u679c\u521b\u5efa\u4e00\u4e2a\u5b9e\u4f8b\u51fd\u6570\u9ed8\u8ba4\u624d\u4f1a\u6709__proto__\uff0c\u8fd9\u4e2a\u662f\u9690\u85cf\u7684\u539f\u578b\u94fe\u63a5\u59cb\u7ec8\u6307\u5411\u539f\u578b\u51fd\u6570\u5373\u4f7f\u641e\u4e71p1.constructor=’asdf’\u4e5f\u4f9d\u7136\u80fd\u6b63\u5e38\u53bb\u83b7\u53d6\u5230\u539f\u578b\u51fd\u6570\u91cc\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u5b9e\u4f8b\u51fd\u6570\u4e0d\u5b58\u5728prototype\u5c5e\u6027,\u4f46\u662f\u5b9e\u4f8b\u51fd\u6570\u53ef\u4ee5\u901a\u8fc7__proto__\u6307\u5411prototype\u5c5e\u6027\u53bb\u5bfb\u627e\u6211\u4eec\u9700\u8981\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u6240\u4ee5\u8bf4\uff1a__proto__\u5b58\u5728\u4e8e\u5b9e\u4f8b\u51fd\u6570\u4e0e\u539f\u578b\u51fd\u6570\u4e4b\u95f4\u3002<\/p>\n

\u4e0a\u9762\u8bf4\u4e86\u6bcf\u521b\u5efa\u4e00\u4e2a(\u6784\u9020)\u51fd\u6570\u7684\u65f6\u5019\u9ed8\u8ba4\u5b58\u5728\u4e00\u4e2aprototype\u5c5e\u6027\uff0cprototype\u5c5e\u6027\u9ed8\u8ba4\u83b7\u53d6constructor\u5c5e\u6027\uff0c\u8fd9\u4e2a\u5c5e\u6027\u53c8\u4f1a\u6307\u5411\u6240\u521b\u5efa\u7684\u6784\u9020\u51fd\u6570\u3002<\/p>\n

console.log(p1.constructor.prototype.ceshi === p1.ceshi); \/\/\u5b8c\u5168\u7b49\u4ef7<\/p>\n

 <\/p>\n

 <\/p>\n

\u5bf9\u4e8e\u8bf4\u5230\u539f\u578b\u51fd\u6570\u6240\u4ee5\u5c31\u8981\u6d89\u53ca\u5230\u539f\u578b\u94fe\uff0c\u5728\u56fe\u4e2d\u6211\u4eec\u53ef\u4ee5\u770b\u5230__proto__\uff0c\u53ea\u8981\u662fnew\u51fa\u73b0\u4e00\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\u5c31\u4f1a\u6709__proto__\uff0c__proto__\u4e5f\u5c31\u4f1a\u81ea\u52a8\u6307\u5411prototype\u5bfb\u627eprototype\u91cc\u9762\u7684\u539f\u578b\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n

\u7b80\u5355\u8bf4\u4e0b\u9762\u5411\u5bf9\u8c61\u7684\u5de5\u4f5c\u6d41\u7a0b\uff1a
\n1,\u58f0\u660e\u4e00\u4e2a\u7c7b\u65f6\uff0c\u91cc\u9762\u53ef\u4ee5\u6dfb\u52a0\u65b9\u6cd5\u548c\u5c5e\u6027\u3002
\n2,\u5b9e\u4f8b\u5316\u5bf9\u8c61\u9700\u8981new\uff0c\u5f53new\u7684\u65f6\u5019JS\u5c31\u9ed8\u8ba4\u521b\u5efa\u4e86\u4e00\u4e2a__proto__\u5c5e\u6027\uff0c\u8fd9\u4e2a\u662fJS\u5185\u7f6e\u7684\u9700\u8981\u5bfb\u627e\u539f\u578b\u51fd\u6570\u7528\u7684\u3002
\n3,\u5f53\u6211\u4eec\u8981\u8c03\u7528\u9762\u5411\u5bf9\u8c61\u91cc\u9762\u7684\u5c5e\u6027\u6216\u8005\u65b9\u6cd5\u65f6\uff0c\u5148\u901a\u8fc7__proto__\u4e00\u5c42\u5c42\u7684\u5bfb\u627e\u9700\u8981\u7684\u5b9e\u4f8b\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u5982\u679c\u627e\u5230\u4e86\u5c31\u4e0d\u4f1a\u5728\u53bb\u627e\u539f\u578b\u7684\u4e86\uff0c\u5982\u679c\u627e\u4e0d\u5230__proto__\u6700\u7ec8\u5230prototype\u91cc\u9762\u5bfb\u627e\u539f\u578b\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u6240\u4ee5\u8bf4\uff1a\u6bcf\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\u91cc\u9762\u7684__proto__\u5c5e\u6027\u6307\u5411\u7684\u662f\u539f\u578b\u51fd\u6570\uff0c\u5b9e\u4f8b\u5bf9\u8c61\u8ddfnew\u5b83\u4eec\u4e4b\u524d\u7684\u6784\u9020\u51fd\u6570\u6ca1\u4ec0\u4e48\u76f4\u63a5\u5173\u7cfb\u3002<\/p>\n

\u539f\u578b\u94fe\u7684\u6838\u5fc3\u5c31\u662f__proto__\u3002<\/p>\n

__proto__\u6700\u7ec8\u6307\u5411\u7684\u662f\u539f\u578bprototype\u3002\u4f8b\u5982\u5728\u7c7b\u4e2d\u521b\u5efa\u4e86\u4e00\u4e2a\u539f\u578b\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8fd9\u6837\u7684\u65b9\u6cd5\u8c03\u7528\u3002<\/p>\n

p1.__proto__.run(); \/\/\u8c03\u7528\u539f\u578b\u7684run\u65b9\u6cd5<\/p>\n

p1.__proto__.run=function(){} \u00a0 \/\/\u8fd9\u6837\u4e5f\u76f8\u5f53\u4e8e\u5728\u539f\u578b\u4e2d\u521b\u5efa\u4e86\u65b9\u6cd5\uff0c\u56e0\u4e3a__proto__\u76f4\u63a5\u6307\u5411\u539f\u578b\u3002<\/p>\n

<\/div>
<\/div><\/div><\/div>\"prototype_pic\"<\/figure><\/a>\n
<\/div>
<\/div><\/div><\/div>\"g_h_h\"<\/figure><\/a>\n

\u4e0a\u56fe\u4e2dprototype\u91cd\u590d\u5199\u4e86\u597d\u51e0\u6b21\uff0c\u5176\u5b9e\u4e5f\u53ef\u4ee5\u7528\u5b57\u9762\u91cf\u65b9\u5f0f\u5199\uff1a<\/p>\n

Wo.prototype={\r\n  name:'',\r\n  age:''\r\n  run:function(){}\r\n}\r\n\u5b57\u9762\u91cf\u7684\u65b9\u5f0f\u5199\u6548\u679c\u8ddf\u4e4b\u524d\u7684\u4e00\u6837\uff0c\u4f46\u662f\u552f\u4e00\u4e0d\u540c\u7684\u662fWo\u6784\u9020\u51fd\u6570\u91cc\u9762\u7684prototype\u5c5e\u6027\u6307\u5411\u7684\u539f\u578b\u5bf9\u8c61\u91cc\u9762\u7684constructor\u5c5e\u6027\u4e0d\u518d\u662f\u6307\u5411Wo\u6784\u9020\u51fd\u6570\u4e86\uff0c\u5982\u679c\u9700\u8981\u91cd\u65b0\u6307\u5411Wo\u6784\u9020\u51fd\u6570\u53ea\u9700\u8981\u6dfb\u52a0\u4e00\u4e2a\u5c5e\u6027\u5373\u53ef\uff1a\r\nWo.prototype={\r\n constructor:Wo,\r\n name:'',\r\n age:''\r\n run:function(){}\r\n}\r\n(\u5b9e\u9645\u4e0a\u6211\u4e5f\u4e0d\u77e5\u9053constructor\u5177\u4f53\u6709\u4ec0\u4e48\u7528?_?)<\/pre>\n
 <\/p>\n
\u5173\u4e8e\u6784\u9020\u51fd\u6570\u548c\u539f\u578b\u5bf9\u8c61\u7684this<\/p>\n
 function Wo() {\r\n     console.log(this);  \/\/\u8fd9\u91cc\u7684this \u6307\u7684\u662fnew Wo()\u5b9e\u4f8b\u5316\u540e\u7684\u5bf9\u8c61\r\n     this.name=\"chen\";  \/\/\u5bf9\u5916\u53d8\u91cf\r\n     var xx=\"xx\";   \/\/\u79c1\u6709\u53d8\u91cf\r\n }\r\n \r\n Wo.prototype.say=function () {\r\n     console.log( this.name );  \/\/ chen\r\n     console.log( this.xx );  \/\/undefined\r\n     console.log( this ); \/\/\u8fd9\u91cc\u7684this \u6307\u7684\u662fnew Wo()\u5b9e\u4f8b\u5316\u540e\u7684\u5bf9\u8c61\r\n }\r\n\r\n new Wo().say();<\/pre>\n
 <\/p>\n
 <\/p>\n
\u63a8\u8350\u4f7f\u7528\u7ec4\u5408\uff1a<\/p>\n
 function Baba(name) {\r\n     this.baba_name=name;\r\n     this.color=['red','greent'];\r\n }\r\n\r\n\r\n Baba.prototype.sayname=function () {\r\n     return this.baba_name; \/\/\u5f53\u6784\u9020\u51fd\u6570\u88abnew\u65f6\uff0c\u539f\u578b\u5bf9\u8c61\u91cc\u9762this\u6307\u7684\u662f\u6784\u9020\u51fd\u6570\r\n };\r\n\r\n\r\n\r\n function Son(name,age) {\r\n     Baba.call(this,name);\r\n     this.age=age;\r\n }\r\n\r\n\r\n Son.prototype=new Baba();\r\n Son.prototype.constructor=Son;\r\n Son.prototype.sayage=function () {\r\n     console.log(this.age);\r\n };\r\n\r\n\r\n var p1=new Son('chen',22);\r\n var p2=new Son('ge',29);\r\n\r\n \/\/son\u7684\u6784\u9020\u51fd\u6570\u548c\u539f\u578b\u5bf9\u8c61\u4e2d\u90fd\u6ca1\u6709sayname\u65b9\u6cd5\uff0c\u4f46\u662fson\u7684\u539f\u578b\u5bf9\u8c61\u7ee7\u627f\u4e86new Baba()\uff0c\r\n \/\/\u800cBaba\u6784\u9020\u51fd\u6570\u4e2d\u7684\u539f\u578b\u5bf9\u8c61\u53c8\u6709sayname\u51fd\u6570\uff0c\u6240\u4ee5p1\u548cp2\u5171\u4eab\u7740\u5176\u5b9e\u662fBaba\u6784\u9020\u51fd\u6570\u7684\u539f\u578b\u5bf9\u8c61\u91cc\u9762\u7684sayname\u51fd\u6570\r\nconsole.log(p1.sayname()) ;  \/\/chen\r\nconsole.log(p2.sayname()) ;  \/\/ge\r\n\r\n\r\n\/\/\u4f1a\u6709\u4eba\u95eeSon.prototype=new Baba()\u4e0d\u662f\u7ee7\u627f\u4e86Baba\u6784\u9020\u51fd\u6570\u91cc\u9762\u7684\u6240\u6709\u5c5e\u6027\u548c\u65b9\u6cd5\u4e86\u5417\uff1f\u6240\u4ee5color\u5e94\u8be5\u4e5f\u662f\u5171\u4eab\u7684\u554a\uff1f\r\n\/\/ \u6ca1\u9519\uff0c\u4f46\u662f\u522b\u5fd8\u8bb0\u4e86son\u4e4b\u524d\u8fd8Baba.call(this,name); \u4e5f\u5c31\u662f\u8bf4son\u6784\u9020\u51fd\u6570\u91cc\u9762\u5df2\u7ecf\u6709\u4e86color\u5bf9\u8c61\u4e86\uff0c\r\n\/\/ \u6240\u4ee5\u5c31\u4e0d\u5fc5\u53bbson\u7684prototype\u91cc\u9762\u53bb\u627ecolor\u5bf9\u8c61\u4e86\u3002\u6240\u4ee5\u4fee\u6539color\u5bf9\u8c61\u662f\u72ec\u7acb\u79c1\u6709\u7684\r\np1.color.push('pink');\r\nconsole.log(p1.color);  \/\/ ['red','greent','pink']\r\nconsole.log(p2.color);  \/\/ ['red','greent']<\/pre>\n
 <\/p>\n
 <\/p>\n
fun1<\/a><\/p>\n
Js\u4e2dPrototype\u3001__proto__\u3001Constructor\u3001Object\u3001Function\u5173\u7cfb\u4ecb\u7ecd<\/a><\/p>\n
\u300a\u8bf7\u95eejs\u4e2d\u7ed9function\u6dfb\u52a0\u7684\u5c5e\u6027\u53bb\u54ea\u513f\u4e86\uff1f\u6709\u4ec0\u4e48\u7528\u9014\uff1f\u300b<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u6848\u4f8b\uff1aUntitled-1 \u9996\u5148\u770b\u4e0b\u6784\u9020\u51fd\u6570\u7684\u4e00\u4e2a\u7b80\u5355\u4f8b\u5b50\uff1a var Box=function(){ \/\/\u58f0\u660e […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26,11],"tags":[],"class_list":["post-3062","post","type-post","status-publish","format-standard","hentry","category-javascript","category-11"],"_links":{"self":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/3062","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3062"}],"version-history":[{"count":0,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/3062\/revisions"}],"wp:attachment":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3062"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3062"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3062"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}