{"id":4058,"date":"2024-11-24T15:57:00","date_gmt":"2024-11-24T07:57:00","guid":{"rendered":"https:\/\/www.gaigaiming.com\/?p=4058"},"modified":"2026-06-24T16:24:22","modified_gmt":"2026-06-24T08:24:22","slug":"%e5%ae%9e%e4%be%8b","status":"publish","type":"post","link":"https:\/\/www.gaigaiming.com\/index.php\/2024\/11\/24\/%e5%ae%9e%e4%be%8b\/","title":{"rendered":"\u5b9e\u4f8b"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">1.\u751f\u6d3b\u7c7b\u6bd4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6784\u9020\u51fd\u6570\/\u7c7b = \u56fe\u7eb8\u3001\u6a21\u5177\u3001\u6a21\u677f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\u86cb\u7cd5\u6a21\u5177\uff0c\u89c4\u5b9a\u86cb\u7cd5\u957f\u4ec0\u4e48\u6837\uff0c\u6709\u4ec0\u4e48\u914d\u6599<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u4f8b=\u7528\u6a21\u5177\u538b\u51fa\u6765\u7684\u771f\u5b9e\u86cb\u7cd5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6a21\u5177\u53ea\u6709\u4e00\u4efd\uff0c\u4f46\u662f\u4f60\u53ef\u4ee5\u505a\u51fa\u65e0\u6570\u4e2a\u72ec\u7acb\u86cb\u7cd5\uff0c\u6bcf\u4e00\u5757\u86cb\u7cd5\uff0c\u90fd\u53eb\u8fd9\u4e2a\u6a21\u5177\u7684\u5b9e\u4f8b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ person \u662f\u6a21\u5177\u3001\u6a21\u677f\uff08\u6784\u9020\u51fd\u6570\uff09\nfunction Person(name){\n this.name = name\n}\n\/\/ p1 p2 \u662f\u4e24\u5757\u72ec\u7acb\u86cb\u7cd5\uff0c\u4e5f\u5c31\u662f\u5b9e\u4f8b\nconst p1 = new Person('zhangsan')\nconst p2 = new Person('lisi')\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">2\u3001\u4e13\u4e1a\u5b9a\u4e49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7new \u6784\u9020\u51fd\u6570()\u3001new \u7c7b() \u521b\u5efa\u51fa\u6765\u7684\u5177\u4f53\u5bf9\u8c61\uff0c\u53eb\u505a\u8be5\u6784\u9020\u51fd\u6570 \u7c7b\u7684\u5b9e\u4f8b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6a21\u677f\uff1a\u62bd\u8c61\u3001\u901a\u7528\uff0c\u63cf\u8ff0\u4e00\u7c7b\u4e8b\u7269\u5171\u6709\u7684\u7279\u5f81<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u4f8b\uff1a\u5177\u4f53\u3001\u771f\u5b9e \u72ec\u7acb\uff0c\u62e5\u6709\u5c5e\u4e8e\u81ea\u5df1\u7684\u6570\u636e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4ec0\u4e48\u53d6\u540d\u53eb\u201c\u5b9e\u4f8b\u201d\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5355\u8bcd\u6e90\u5934 instance \u4e00\u4e2a\u5b9e\u5b9e\u5728\u5728\uff0c\u5177\u4f53\u51fa\u73b0\u7684\u4e2a\u4f53<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\uff1a\u771f\u5b9e\u3001\u5b9e\u9645\u5b58\u5728\uff0c\u4e0d\u662f\u62bd\u8c61\u6a21\u677f\uff0c\u6784\u9020\u51fd\u6570\u53ea\u662f\u4e00\u6bb5\u4ee3\u7801\uff0c\u4e00\u4e2a\u89c4\u5219\u770b\u4e0d\u89c1\u6478\u4e0d\u7740\uff0cnew\u51fa\u6765\u7684\u5bf9\u8c61\u5b58\u5728\u5185\u5b58\u91cc\uff0c\u53ef\u4ee5\u6253\u5370\uff0c\u4fee\u6539\u5c5e\u6027\uff0c\u662f\u5b9e\u4f53\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\uff1a\u4f8b\u5b50 \u4e2a\u4f53\u6837\u672c\uff0c\u5b83\u662f\u8fd9\u7c7b\u4e8b\u7269\u5176\u4e2d\u4e00\u4e2a\u5177\u4f53\u6837\u672c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5408\u8d77\u6765 \u5b9e\u5b9e\u5728\u5728\u7684\u4e00\u4e2a\u6837\u672c\u4e2a\u4f53=\u300b\u5b9e\u4f8b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u603b\u7ed3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1\u3001\u5b9e\u4f8b = \u6a21\u677f\u9020\u51fa\u6765\u7684\u5177\u4f53\u5b9e\u4f53\u5bf9\u8c61<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2\u3001\u53eb\u5b9e\u4f8b\u662f\u56e0\u4e3a\u5b83\u662f\u4e00\u7c7b\u4e8b\u7269\u91cc\u771f\u5b9e\u5b58\u5728\u7684\u5355\u4e2a\u6837\u672c\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3\u3001\u6784\u9020\u51fd\u6570\u91cc\u7684this\uff0c\u5c31\u4ee3\u8868\u5f53\u524d\u6b63\u5728new \u6b63\u5728\u521b\u5efa\u7684\u90a3\u4e00\u4e2a\u5b9e\u4f8b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u533a\u5206<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1\u3001\u7c7b\u6784\u9020\u51fd\u6570 \u6a21\u677f\u62bd\u8c61<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2\u3001\u5b9e\u4f8b\uff1a\u6709\u6a21\u677f\u751f\u6210\u7684\u5177\u4f53\u5bf9\u8c61 \u5b9e\u4f53<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3\u3001\u5b9e\u4f8b\u5316\uff1a new XXX()\u8fd9\u4e2a\u751f\u6210\u5bf9\u8c61\u7684\u52a8\u4f5c\uff0c\u53eb\u5b9e\u4f8b\u5316\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5b50<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1\u3001\u5199 class  cat\uff5b\uff5d==\u5236\u4f5c\u732b\u54aa\u6a21\u677f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2\u3001const miao = new Cat() -\u300b \u6267\u884c\u5b9e\u4f8b\u5316<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3\u3001miao => Cat\u7684\u5b9e\u4f8b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53e6\u9644 new \u548c this<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u666e\u901a\u51fd\u6570\uff0cthis\u9ed8\u8ba4\u6307\u5411window \u6d4f\u89c8\u5668\u3002 \u52a0new \u53d8\u6210\u6784\u9020\u8c03\u7528\uff0cjs\u5f3a\u5236\u6539\u5199this\u6307\u5411\u65b0\u5efa\u5b9e\u4f8b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u624b\u5199\u7b80\u6613new\uff0c\u4e00\u773c\u770b\u61c2this\u7ed1\u5b9a\u903b\u8f91<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>function myNew(Constructor,...args){\n    \/\/ 1\u3001\u521b\u5efa\u7a7a\u5bf9\u8c61\n    const obj = {};\n    \/\/ 2\u3001\u7ed1\u5b9a\u539f\u578b\n    obj._proto_ = Constructor.prototype;\n    \/\/ 3\u3001\u6267\u884c\u6784\u9020\u51fd\u6570\uff0c\u628athis \u624b\u52a8\u6307\u5b9a\u4e3a obj\n    const res = Constructor.apply(obj, args);\n    \/\/ 4\u3001\u8fd4\u56de\u5b9e\u4f8b\u5bf9\u8c61\n    return typeof res === 'object' ? res : obj;\n}\nfunction Dog(name){\n    this.name = name \/\/\u5b9e\u4f8b\u5c5e\u6027\n}\nconst dog = myNew(Dog,'wangwang');\nconsole.log(dog.name) <\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>1.\u751f\u6d3b\u7c7b\u6bd4 \u6784\u9020\u51fd\u6570\/\u7c7b = \u56fe\u7eb8\u3001\u6a21\u5177\u3001\u6a21\u677f \u6bd4\u5982\u86cb\u7cd5\u6a21\u5177\uff0c\u89c4\u5b9a\u86cb\u7cd5\u957f\u4ec0\u4e48\u6837\uff0c\u6709\u4ec0\u4e48\u914d\u6599 \u5b9e\u4f8b=\u7528\u6a21\u5177\u538b\u51fa [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-4058","post","type-post","status-publish","format-standard","hentry","category-4"],"_links":{"self":[{"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/posts\/4058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/comments?post=4058"}],"version-history":[{"count":1,"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/posts\/4058\/revisions"}],"predecessor-version":[{"id":4059,"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/posts\/4058\/revisions\/4059"}],"wp:attachment":[{"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/media?parent=4058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/categories?post=4058"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gaigaiming.com\/index.php\/wp-json\/wp\/v2\/tags?post=4058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}