{"id":9894,"date":"2023-11-28T21:18:54","date_gmt":"2023-11-28T13:18:54","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=9894"},"modified":"2023-11-30T19:53:40","modified_gmt":"2023-11-30T11:53:40","slug":"javascript-zhongnew-cao-zuo-fu-ju-ti-gan-le-shen-m","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/javascript-zhongnew-cao-zuo-fu-ju-ti-gan-le-shen-m\/","title":{"rendered":"JavaScript \u4e2d new \u64cd\u4f5c\u7b26\u5177\u4f53\u5e72\u4e86\u4ec0\u4e48\u5462\uff1f"},"content":{"rendered":"

new<\/code> \u64cd\u4f5c\u7b26\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u5e76\u4e14\u5728\u5b9e\u4f8b\u5316\u8fc7\u7a0b\u4e2d\u8c03\u7528\u6784\u9020\u51fd\u6570\u3002\u5728JavaScript\u4e2d\uff0cnew<\/code> \u64cd\u4f5c\u7b26\u5177\u4f53\u505a\u4e86\u4ee5\u4e0b\u51e0\u4ef6\u4e8b\u60c5\uff1a<\/p>\n

    \n
  1. \n

    \u521b\u5efa\u4e00\u4e2a\u7a7a\u5bf9\u8c61<\/strong>\uff1anew<\/code> \u64cd\u4f5c\u7b26\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7a7a\u5bf9\u8c61\u3002<\/p>\n<\/li>\n

  2. \n

    \u5c06\u6784\u9020\u51fd\u6570\u7684\u4f5c\u7528\u57df\u8d4b\u7ed9\u65b0\u5bf9\u8c61<\/strong>\uff1a\u65b0\u5bf9\u8c61\u88ab\u8d4b\u4e88\u6784\u9020\u51fd\u6570\u7684 prototype<\/code> \u5c5e\u6027\uff08\u4e5f\u5c31\u662f\u539f\u578b\u5bf9\u8c61\uff09\u3002<\/p>\n<\/li>\n

  3. \n

    \u6267\u884c\u6784\u9020\u51fd\u6570<\/strong>\uff1a\u5c06\u65b0\u5bf9\u8c61\u4f5c\u4e3a this<\/code> \u5173\u952e\u5b57\u7684\u503c\uff0c\u6267\u884c\u6784\u9020\u51fd\u6570\uff0c\u540c\u65f6\u521d\u59cb\u5316\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u5728\u6784\u9020\u51fd\u6570\u4e2d\u53ef\u4ee5\u901a\u8fc7 this<\/code> \u6765\u6307\u5411\u65b0\u521b\u5efa\u7684\u5bf9\u8c61\uff0c\u5e76\u8bbe\u7f6e\u8be5\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n<\/li>\n

  4. \n

    \u8fd4\u56de\u65b0\u5bf9\u8c61<\/strong>\uff1a\u5982\u679c\u6784\u9020\u51fd\u6570\u6ca1\u6709\u663e\u5f0f\u8fd4\u56de\u5176\u4ed6\u5bf9\u8c61\uff0cnew<\/code> \u64cd\u4f5c\u7b26\u4f1a\u9690\u5f0f\u8fd4\u56de\u8fd9\u4e2a\u65b0\u521b\u5efa\u7684\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/p>\n<\/li>\n<\/ol>\n

    \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

    function Person(name, age) {\n  this.name = name;\n  this.age = age;\n}\n\n\/\/ \u4f7f\u7528 new \u64cd\u4f5c\u7b26\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\nlet person1 = new Person('Alice', 30);\nconsole.log(person1.name); \/\/ \u8f93\u51fa "Alice"\nconsole.log(person1.age); \/\/ \u8f93\u51fa 30\n<\/code><\/pre>\n
    \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cnew Person('Alice', 30)<\/code> \u8fd9\u4e2a\u64cd\u4f5c\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684 Person<\/code> \u5bf9\u8c61\u5b9e\u4f8b\u3002\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0cPerson<\/code> \u6784\u9020\u51fd\u6570\u88ab\u8c03\u7528\uff0c\u5e76\u4e14\u5c06\u5176\u5c5e\u6027 name<\/code> \u548c age<\/code> \u5206\u522b\u8d4b\u503c\u7ed9\u4e86\u65b0\u521b\u5efa\u7684 person1<\/code> \u5bf9\u8c61\u5b9e\u4f8b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    new \u64cd\u4f5c\u7b26\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u5e76\u4e14\u5728\u5b9e\u4f8b\u5316\u8fc7\u7a0b\u4e2d\u8c03\u7528\u6784\u9020\u51fd\u6570\u3002\u5728JavaScript\u4e2d\uff0cnew \u64cd\u4f5c […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[115],"tags":[],"class_list":["post-9894","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9894","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=9894"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9894\/revisions"}],"predecessor-version":[{"id":13701,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/9894\/revisions\/13701"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=9894"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=9894"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=9894"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}