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全删")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("5.")]),s._v(" m"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("has")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'hello'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 查,查的时候是查key值")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("6.")]),s._v(" m"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("size "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 相当于length")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("7.")]),s._v(" m"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("keys")]),a("span",{pre:!0,attrs:{class:"token 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"),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// es6")]),s._v("\n   Math"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("floor")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("null")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("4")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("5")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// es5")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("2.")]),s._v(" 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Reflect"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("deleteProperty")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 删除属性描述符")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("6.")]),s._v(" Reflect"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("get")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("obj"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'name'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 获取值")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("7.")]),s._v(" Reflect"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("set")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("obj"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'name'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'cj'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 设置值")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("8.")]),s._v(" Reflect"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("getPrototypeOf")]),a("span",{pre:!0,attrs:{class:"token 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punctuation"}},[s._v("(")]),s._v("obj"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 判断是否可扩展,返回布尔值")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("11.")]),s._v(" Reflect"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("prevenExtensions")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("obj"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 把obj变为不可扩展")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("12.")]),s._v(" Reflect"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("setPrototypeOf")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("arr"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("String")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("prototype"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("//  把arr的原型改成String")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("13.")]),s._v(" Reflect"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("ownKeys")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("obj"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 获取非原型的属性")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("14.")]),s._v(" Reflect"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("hasOwnProperty")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token string"}},[s._v("'name'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// 判断name是否是自身属性而不是原型上的")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token 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operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token 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string"}},[s._v("'cj'")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" age"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("23")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n   "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("let")]),s._v(" j "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("new")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("proxy")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("c"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n       "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("get")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("target"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" key"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" target"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("[")]),s._v("key"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("]")]),s._v("\n       "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n       "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("set")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("target"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" key"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" 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"),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("set")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("target"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" key"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" value"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n        "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token boolean"}},[s._v("false")]),s._v("\n       "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n     "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n   "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n可以撤销代理的对象j"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("里面包括j"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("proxy代理的内容和j"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("revoke")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("方法撤销代理\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("3.")]),s._v(" 当第"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("2")]),s._v("个参数为空时"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("相当是对第一个参数做的一次浅拷贝\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("4.")]),s._v(" 类似es5的getter"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("/")]),s._v("setter\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("5.")]),s._v(" proxy相当于去修改设置对象的属性行为"),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("而Reflect则是获取对象的这些行为\n"),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token 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operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("--")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token comment"}},[s._v("// Generator(控制函数执行)")]),s._v("\n"),a("span",{pre:!0,attrs:{class:"token number"}},[s._v("1.")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("function")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token operator"}},[s._v("*")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token function"}},[s._v("loop")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n    "),a("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("for")]),a("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),a("span",{pre:!0,attrs:{class:"token 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