{"id":33421,"date":"2024-11-25T12:36:13","date_gmt":"2024-11-25T04:36:13","guid":{"rendered":"https:\/\/fwq.ai\/blog\/33421\/"},"modified":"2024-11-25T12:36:13","modified_gmt":"2024-11-25T04:36:13","slug":"proxy-%e5%af%b9%e8%b1%a1%e7%9a%84%e4%ba%86%e8%a7%a3%e5%8f%8a%e5%ad%a6%e4%b9%a0","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/33421\/","title":{"rendered":"Proxy \u5bf9\u8c61\u7684\u4e86\u89e3\u53ca\u5b66\u4e60"},"content":{"rendered":"<h3>1\u3001Proxy \u5bf9\u8c61\u5230\u5e95\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>proxy \u5bf9\u8c61\u5230\u5e95\u662f\u4ec0\u4e48\u5462\uff1fproxy \u7684\u610f\u601d\u662f \u4ee3\u7406\uff0cproxy\u5bf9\u8c61\u7684\u4f5c\u7528\u662f\uff1a\u901a\u8fc7proxy \u521b\u5efa1\u4e2a\u4ee3\u7406\u5bf9\u8c61\uff0c\u7136\u540e\u901a\u8fc7\u64cd\u4f5c\u4ee3\u7406\u5bf9\u8c61\u5141\u8bb8\u4f60\u5bf9\u6307\u5b9a\u7684\u5bf9\u8c61\u7684\u4e00\u4e9b\u884c\u4e3a\u8fdb\u884c\u81ea\u5b9a\u4e49\u5904\u7406\u3002<\/p>\n<p>Proxy(target,handler); Proxy\u6784\u9020\u51fd\u6570\u63a5\u65362\u4e2a\u5bf9\u8c61\uff0c\u7b2c1\u4e2a\u53c2\u6570\u5c31\u662f\u8981\u5904\u7406\u7684\u5bf9\u8c61\uff0c\u7b2c2\u4e2a\u53c2\u6570\u5c31\u662f\u8981\u81ea\u5b9a\u4e49\u5904\u7406\u7684\u65b9\u6cd5\u7684\u5408\u96c6(\u4e5f\u5c31\u662f\u4e2a\u5bf9\u8c61)\u3002<\/p>\n<p>\u5f88\u62bd\u8c61\uff1f\u5176\u5b9e\u5c31\u548cjs\u4e2d\u7684Object.defineProperty\u5f88\u50cf(\u4e5f\u5c31\u662f\u8bbf\u95ee\u5668\u5c5e\u6027,vue2.x\u7684\u5e95\u5c42\u5c31\u662f\u7528\u5b83\u6765\u5b9e\u73b0\u7684)\u3002<\/p>\n<p>Object.defineProperty \u5b9a\u4e49\u8bbf\u95ee\u5668\u5c5e\u6027\uff0c\u53ef\u4ee5\u5bf9\u67d0\u4e2a\u5c5e\u6027\u7684\u8bfb\u5199\u884c\u4e3a\u8fdb\u884c\u63a7\u5236\uff0c\u5728Proxy\u4e2d\u4e5f\u53ef\u4ee5\u505a\u5230\uff0c\u800c\u4e14Proxy\u66f4\u7075\u6d3b\u548c\u5f3a\u5927\uff0c\u5b83\u80fd\u505a\u5230\u5f88\u591a\u8bbf\u95ee\u5668\u5c5e\u6027\u505a\u4e0d\u5230\u7684\u4e8b\u60c5\u3002<\/p>\n<p>\u6bd4\u5982\uff0c\u76d1\u542c\u5c5e\u6027\u5220\u9664\u4e8b\u4ef6(delete obj.prop;),in \u4e8b\u4ef6(&#8216;id&#8217; in obj;), apply \u8c03\u7528\u7b49\u3002<\/p>\n<p>\u5148\u6765\u770b\u770b\uff0cproxy\u5bf9\u8c61\u6709\u54ea\u4e9b\u5185\u5bb9\u3002<\/p>\n<pre>    var targetObj = {\n        id : 1,\n        name : 'pxh',\n        age : 20,\n        school : '\u5c0f\u5b66'\n    }\n    \n    var handler = {};\n    \n    \/\/ \u6b64\u5904\uff0c\u6211\u4eec\u5148\u4e0d\u5bf9targetObj\u7684\u884c\u4e3a\u8fdb\u884c\u5e72\u9884\uff0c\u6240\u4ee5\u4f20\u4e2a\u7a7a\u5bf9\u8c61\u8fdb\u53bb\u5373\u53ef\u3002\n    var proxy = new Proxy(targetObj,handler);\n    \n    console.log(proxy);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u770b\u770b\u6253\u5370\u7684proxy\u662f\u4ec0\u4e48\u9b3c\uff0c\u5982\u4e0b\u56fe\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/image\/937\/160\/562\/1593398237478010.png\" class=\"aligncenter\" title=\"Proxy \u5bf9\u8c61\u7684\u4e86\u89e3\u53ca\u5b66\u4e60\u63d2\u56fe\" alt=\"Proxy \u5bf9\u8c61\u7684\u4e86\u89e3\u53ca\u5b66\u4e60\u63d2\u56fe\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u5230\uff0cproxy\u5bf9\u8c61\u4e2d\uff0c\u5305\u542b\u4e86Handler\u5c5e\u6027\u548cTarget\u5c5e\u6027\u548cIsRevoked\uff0c\u5b83\u4eec\u7684\u503c\u5206\u522b\u662f\u6211\u4eec\u4f20\u5165\u7684handler\u4ee5\u53ca targetObj\u548cfalse\u3002<\/p>\n<p>\u8fd9\u4e2aisRevoked\u8868\u793a\u662f\u5426\u53ef\u64a4\u9500\uff0c\u751f\u6210\u53ef\u64a4\u9500\u7684proxy\u5bf9\u8c61\u7528Proxy.revocable()\u65b9\u6cd5\uff0c\u5177\u4f53\u53ef\u53bbMDN\u67e5\u770b\u6587\u6863\u3002<\/p>\n<h3>2\u3001\u901a\u8fc7Proxy \u5bf9\u8c61\u64cd\u4f5c\u539f\u5bf9\u8c61<\/h3>\n<p>\u4e0a\u9762\u6211\u4eec\u521b\u5efa\u4e861\u4e2aproxy\u5bf9\u8c61\uff0c\u73b0\u5728\u6211\u4eec\u5c1d\u8bd5\u901a\u8fc7\u64cd\u4f5cproxy\u5bf9\u8c61\u6765\u64cd\u4f5c\u539f\u5bf9\u8c61\uff0c\u64cd\u4f5cproxy\u5bf9\u8c61\u5c31\u548c\u64cd\u4f5c\u539f\u751f\u5bf9\u8c61\u4e00\u6837\u5373\u53ef\u3002(\u5176\u5b9e\u662fproxy\u5bf9\u8c61\u5185\u90e8\u505a\u4e86\u6620\u5c04\u3002)<\/p>\n<pre>    var targetObj = {\n        id : 1,\n        name : 'pxh',\n        age : 20,\n        school : '\u5c0f\u5b66'\n    }\n    \n    var handler = {};\n    \n    \/\/ \u6b64\u5904\uff0c\u6211\u4eec\u5148\u4e0d\u5bf9targetObj\u7684\u884c\u4e3a\u8fdb\u884c\u5e72\u9884\uff0c\u6240\u4ee5\u4f20\u4e2a\u7a7a\u5bf9\u8c61\u8fdb\u53bb\u5373\u53ef\u3002\n    var proxy = new Proxy(targetObj,handler);\n    \n    \n    \/**\n     * 1\u3001\u8bfb\u53d6\u53ca\u4fee\u6539\u5c5e\u6027\uff0c\u53ef\u4ee5\u770b\u5230\u539f\u6765\u7684\u5bf9\u8c61\u7684\u5c5e\u6027\u4e5f\u88ab\u4fee\u6539\u4e86\n     *\/\n    console.log(proxy.age);  \/\/ 20\n    console.log(targetObj.age); \/\/ 20\n    proxy.age = 22;\n    console.log(proxy.age);  \/\/ 22\n    console.log(targetObj.age); \/\/ 22\n    \n    \/**\n     * 2\u3001\u5220\u9664proxy\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u5f71\u54cd\u539f\u6765\u7684\u5bf9\u8c61\u7684\u5c5e\u6027\n     *\/\n    console.log(proxy.school);  \/\/ \u5c0f\u5b66\n    console.log(targetObj.school); \/\/ \u5c0f\u5b66\n    delete proxy.age;\n    console.log(proxy.school);  \/\/ undefined\n    console.log(targetObj.school); \/\/ undefined<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<h3>3\u3001set\u65b9\u6cd5\u548cget\u65b9\u6cd5<\/h3>\n<p>\u597d\uff0c\u73b0\u5728\u6211\u4eec\u53ef\u4ee5\u5f00\u59cb\u5e72\u9884\u539f\u6765\u5bf9\u8c61\u7684\u884c\u4e3a\u4e86\uff0c\u5177\u4f53\u6211\u4eec\u901a\u8fc7\u5b9e\u73b0\u4ee5\u4e0b\u65b9\u6cd5\u8fbe\u5230\u5e72\u9884\u5bf9\u8c61\u884c\u4e3a\u7684\u76ee\u7684\u3002<\/p>\n<ul>\n<li>\n<p>handler.apply<\/p>\n<\/li>\n<li>\n<p>handler.construct &nbsp; &nbsp; &nbsp; \u5e72\u9884\u6784\u9020\u51fd\u6570\u7684new \u884c\u4e3a<\/p>\n<\/li>\n<li>\n<p>handler.defineProperty &nbsp;\u5e72\u9884\u5bf9\u8c61\u7684\u6570\u636e\u5c5e\u6027\u6216\u8005\u8bbf\u95ee\u5668\u5c5e\u6027\u5b9a\u4e49<\/p>\n<\/li>\n<li>\n<p>handler.deleteProperty &nbsp;\u5e72\u9884\u5bf9\u8c61\u7684\u5c5e\u6027\u5220\u9664\u884c\u4e3a<\/p>\n<\/li>\n<li>\n<p>handler.get &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; \u5e72\u9884\u5bf9\u8c61\u7684\u5c5e\u6027\u8bfb\u53d6\u884c\u4e3a<\/p>\n<\/li>\n<li>\n<p>handler.getOwnProperty &nbsp;\u5e72\u9884\u5bf9\u8c61\u7684\u5c5e\u6027\u7684\u7279\u5f81\u503c<\/p>\n<\/li>\n<li>\n<p>handler.has &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; \u5e72\u9884\u5bf9\u8c61\u7684in\u884c\u4e3a(prop in obj)<\/p>\n<\/li>\n<li>\n<p>handler.isExtensible<\/p>\n<\/li>\n<li>\n<p>handler.ownKeys<\/p>\n<\/li>\n<li>\n<p>handler.set &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; \u5e72\u9884\u5bf9\u8c61\u7684\u5c5e\u6027\u8bbe\u7f6e\u884c\u4e3a<\/p>\n<\/li>\n<li>&#8230;<\/li>\n<\/ul>\n<p>\u5148\u6765\u5e72\u9884get\u884c\u4e3a(\u5c5e\u6027\u8bfb\u53d6\u884c\u4e3a)<\/p>\n<pre>    var targetObj = {\n        id : 1,\n        name : 'pxh',\n        age : 20,\n        school : '\u5c0f\u5b66'\n    }\n    \n    \n    var handler = {\n        \/\/ \u5b9a\u4e49get\u65b9\u6cd5\uff0cget\u65b9\u6cd5\u53ef\u4ee5\u63a5\u65362\u4e2a\u53c2\u6570\uff0c\u5206\u522b\u662f\u539f\u6765\u7684\u5bf9\u8c61\u53ca\u5c5e\u6027\n        get : function(target,prop){\n            console.log(`${prop}\u5c5e\u6027\u6b63\u5728\u88ab\u67e5\u770b`);\n            console.log(targetObj == target); \/\/ true\n            return target[prop];\n        }\n    };\n    \n    var proxy = new Proxy(targetObj,handler);\n    \n    console.log(proxy.id);\n    \n    \/**\n     * \u53ef\u4ee5\u770b\u5230\uff0c\u6253\u5370\u987a\u5e8f\u4e3a:\n     *  id\u5c5e\u6027\u6b63\u5728\u88ab\u67e5\u770b\n     *  true\n     *  1\n     *\/<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u63a5\u4e0b\u6765\u628a\u67d0\u4e9b\u5c5e\u6027\u53d8\u4e3a \u201c\u79c1\u6709\u201d \uff0c\u5982\u4e0d\u5141\u8bb8\u8bfb\u53d6id\u5c5e\u6027<\/p>\n<p>\u5b9a\u4e49set\u65b9\u6cd5\uff0c\u4e0d\u5141\u8bb8\u4fee\u6539id,name,age\u5c5e\u6027<\/p>\n<pre>    var targetObj = {\n        id : 1,\n        name : 'pxh',\n        age : 20,\n        school : '\u5c0f\u5b66'\n    }\n    \n    \n    var handler = {\n        \/\/ \u5b9a\u4e49get\u65b9\u6cd5\uff0cget\u65b9\u6cd5\u53ef\u4ee5\u63a5\u65362\u4e2a\u53c2\u6570\uff0c\u5206\u522b\u662f\u539f\u6765\u7684\u5bf9\u8c61\u53ca\u5c5e\u6027\n        get : function(target,prop){\n            if(prop == 'id'){\n                return undefined;\n            }\n            return target[prop];\n        },\n        \/\/ \u5b9a\u4e49set\u65b9\u6cd5\uff0cset\u65b9\u6cd5\u6bd4get\u591a1\u4e2a\u53c2\u6570\uff0c\u90a3\u5c31\u662f\u8be5\u5c5e\u6027\u4fee\u6539\u65f6\u7684\u503c\n        set : function(target,prop,value){\n            if(prop == 'id' || prop == 'name' || prop == 'age'){\n                console.log(`\u4e0d\u5141\u8bb8\u4fee\u6539${prop}\u5c5e\u6027`)\n            }else{\n                target[prop] = value;\n            }\n        }\n    };\n    \n    var proxy = new Proxy(targetObj,handler);\n    \n    \/**\n     * \u4fee\u6539\u5c5e\u6027\uff0c\u5206\u522b\u6253\u5370\n     * \u4e0d\u5141\u8bb8\u4fee\u6539id\u5c5e\u6027\n     * \u4e0d\u5141\u8bb8\u4fee\u6539name\u5c5e\u6027\n     * \u4e0d\u5141\u8bb8\u4fee\u6539age\u5c5e\u6027\n     *\/\n    proxy.id = 2; \n    proxy.name = 'pxh222';\n    proxy.age = 23;\n    \n    proxy.school = '\u4e2d\u5b66'; \/\/ \u8fd9\u4e2a\u65e0\u6253\u5370\n    \n    \/**\n     * \u8bfb\u53d6\u5c5e\u6027\uff0c\u53ef\u4ee5\u770b\u5230\u5206\u522b\u6253\u5370\n     * undefined\n     * pxh\n     * 20\n     * \u4e2d\u5b66  \/\/ \u8fd9\u4e2a\u6ca1\u6709\u62e6\u622a\uff0c\u56e0\u6b64\u53ef\u4ee5\u4fee\u6539\n     *\/\n    console.log(proxy.id);\n    console.log(proxy.name);\n    console.log(proxy.age);\n    console.log(proxy.school);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<h3>4\u3001\u5e72\u9884\u5220\u9664\u884c\u4e3a(\u5bf9delete obj.prop\u8bed\u53e5\u751f\u6548)<\/h3>\n<p>\u540c\u6837\u7684\uff0c\u6211\u4eec\u5bf9\u5220\u9664\u5bf9\u8c61\u5c5e\u6027\u7684\u884c\u4e3a\u8fdb\u884c\u5e72\u9884\uff0c\u4e0d\u5141\u8bb8\u5220\u9664id,name,age\u5c5e\u6027\u3002<\/p>\n<pre>    var targetObj = {\n        id : 1,\n        name : 'pxh',\n        age : 20,\n        school : '\u5c0f\u5b66'\n    }\n    \n    var handler = {\n        \/\/ \u5728handler\u4e2d\u5b9a\u4e49get\u65b9\u6cd5\uff0cget\u65b9\u6cd5\u53ef\u4ee5\u63a5\u65362\u4e2a\u53c2\u6570\uff0c\u5206\u522b\u662f\u539f\u6765\u7684\u5bf9\u8c61\u53ca\u5c5e\u6027\n        get : function(target,prop){\n            if(prop == 'id'){\n                return undefined;\n            }\n            return target[prop];\n        },\n        \/\/ set\u65b9\u6cd5\u6bd4get\u591a1\u4e2a\u53c2\u6570\uff0c\u90a3\u5c31\u662f\u8be5\u5c5e\u6027\u4fee\u6539\u65f6\u7684\u503c\n        set : function(target,prop,value){\n            if(prop == 'id' || prop == 'name' || prop == 'age'){\n                console.log(`\u4e0d\u5141\u8bb8\u4fee\u6539${prop}\u5c5e\u6027`)\n            }else{\n                target[prop] = value;\n            }\n        },\n        \/**\n         * \u8fd9\u4e2a\u65b9\u6cd5\u8981\u6c42\u8fd4\u56de\u4e2aboolean\u503c\uff0c\u8868\u793a\u662f\u5426\u5220\u9664\u6210\u529f\n         * \u5982\u679c\u8fd4\u56de\u7684\u503c\u4e0d\u662fboolean\u503c\uff0c\u5219\u4f1a\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\u6210boolean\u503c\u518d\u8fd4\u56de\n         *\/\n        deleteProperty : function(target,prop){\n            if(prop == 'id' || prop == 'name' || prop == 'age'){\n                console.log(`\u4e0d\u5141\u8bb8\u5220\u9664${prop}\u5c5e\u6027`);\n                return false;\n            }else{\n                delete target[prop];\n                return true;\n            }\n        }\n    };\n    \n    var proxy = new Proxy(targetObj,handler);\n    \/**\n     * \u5c1d\u8bd5\u5220\u9664id\u5c5e\u6027\uff0c\u53ef\u4ee5\u770b\u5230\u6253\u5370\u987a\u5e8f\u4e3a:\n     * \u4e0d\u5141\u8bb8\u5220\u9664id\u5c5e\u6027\n     * false\n     *\/\n    console.log(delete proxy.id);\n    \n    \/**\n     * \u5220\u9664school\u5c5e\u6027\uff0c\u53ef\u4ee5\u770b\u5230\u6253\u5370\n     * true\n     * undefined\n     *\/\n    console.log(delete proxy.school);\n    console.log(proxy.school);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<h3>5\u3001\u5e72\u9884prop in obj\u884c\u4e3a(\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u6709\u67d0\u4e2a\u5c5e\u6027)<\/h3>\n<p>\u4e0a\u9762\u6211\u4eec\u4e0d\u5141\u8bb8\u83b7\u53d6\u5bf9\u8c61\u7684id\u503c\uff0c\u4e5f\u4e0d\u53ef\u4ee5\u4fee\u6539\u548c\u5220\u9664\uff0c\u73b0\u5728\u6211\u4eec\u628a\u5b83\u9690\u85cf\u6389\u3002<\/p>\n<pre>    var targetObj = {\n        id : 1,\n        name : 'pxh',\n        age : 20,\n        school : '\u5c0f\u5b66'\n    }\n    \n    var handler = {\n        \/\/ \u5728handler\u4e2d\u5b9a\u4e49get\u65b9\u6cd5\uff0cget\u65b9\u6cd5\u53ef\u4ee5\u63a5\u65362\u4e2a\u53c2\u6570\uff0c\u5206\u522b\u662f\u539f\u6765\u7684\u5bf9\u8c61\u53ca\u5c5e\u6027\n        get : function(target,prop){\n            if(prop == 'id'){\n                return undefined;\n            }\n            return target[prop];\n        },\n        \/\/ set\u65b9\u6cd5\u6bd4get\u591a1\u4e2a\u53c2\u6570\uff0c\u90a3\u5c31\u662f\u8be5\u5c5e\u6027\u4fee\u6539\u65f6\u7684\u503c\n        set : function(target,prop,value){\n            if(prop == 'id' || prop == 'name' || prop == 'age'){\n                console.log(`\u4e0d\u5141\u8bb8\u4fee\u6539${prop}\u5c5e\u6027`)\n            }else{\n                target[prop] = value;\n            }\n        },\n        \/**\n         * \u8fd9\u4e2a\u65b9\u6cd5\u8981\u6c42\u8fd4\u56de\u4e2aboolean\u503c\uff0c\u8868\u793a\u662f\u5426\u5220\u9664\u6210\u529f\n         * \u5982\u679c\u8fd4\u56de\u7684\u503c\u4e0d\u662fboolean\u503c\uff0c\u5219\u4f1a\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\u6210boolean\u503c\u518d\u8fd4\u56de\n         *\/\n        deleteProperty : function(target,prop){\n            if(prop == 'id' || prop == 'name' || prop == 'age'){\n                console.log(`\u4e0d\u5141\u8bb8\u5220\u9664${prop}\u5c5e\u6027`);\n                return false;\n            }else{\n                delete target[prop];\n                return true;\n            }\n        },\n        \/**\n         * \u901a\u8fc7has \u65b9\u6cd5\u6765\u63a7\u5236\uff0c\u8fd4\u56de\u503c\u4e5f\u662f\u4e2aboolean\uff0c\u8868\u793a\u5bf9\u8c61\u662f\u5426\u62e5\u6709\u67d0\u4e2a\u5c5e\u6027\n         * \u5982\u679c\u8fd4\u56de\u7684\u503c\u4e0d\u662fboolean\u503c\uff0c\u5219\u4f1a\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\u6210boolean\u503c\u518d\u8fd4\u56de\n         *\/\n        has : function(target,prop){\n            if(prop == 'id'){\n                return false\n            }else{\n                return prop in target;\n            }\n        }\n    };\n    \n    var proxy = new Proxy(targetObj,handler);\n    console.log('id' in proxy); \/\/ false\n    console.log('name' in proxy); \/\/ true<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<h3>6\u3001\u603b\u7ed3<\/h3>\n<p>\u540c\u6837\u7684\uff0cproxy\u8fd8\u80fd\u5e72\u9884\u5bf9\u8c61\u7684\u884c\u4e3a\u8fd8\u6709\u5f88\u591a\uff0c\u8fd9\u91cc\u5c31\u4e0d\u4e00\u4e00\u4ecb\u7ecd\u4e86\u3002\u611f\u5174\u8da3\u6233MDN\u6587\u6863<\/p>\n<p>\u63a8\u8350\u6559\u7a0b\uff1a\u300a\u300b<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fProxy \u5bf9\u8c61\u7684\u4e86\u89e3\u53ca\u5b66\u4e60\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001Proxy \u5bf9\u8c61\u5230\u5e95\u662f\u4ec0\u4e48\uff1f proxy \u5bf9\u8c61\u5230\u5e95\u662f\u4ec0\u4e48\u5462\uff1fproxy \u7684\u610f\u601d\u662f \u4ee3\u7406\uff0cproxy\u5bf9\u8c61\u7684\u4f5c\u7528\u662f\uff1a\u901a\u8fc7proxy \u521b\u5efa1\u4e2a\u4ee3\u7406\u5bf9\u8c61\uff0c\u7136\u540e\u901a\u8fc7\u64cd\u4f5c\u4ee3\u7406\u5bf9\u8c61\u5141\u8bb8\u4f60\u5bf9\u6307\u5b9a\u7684\u5bf9\u8c61\u7684\u4e00\u4e9b\u884c\u4e3a\u8fdb\u884c\u81ea\u5b9a\u4e49\u5904\u7406\u3002 Proxy(target,handler); Proxy\u6784\u9020\u51fd\u6570\u63a5\u65362\u4e2a\u5bf9\u8c61\uff0c\u7b2c1\u4e2a\u53c2\u6570\u5c31\u662f\u8981\u5904\u7406\u7684\u5bf9\u8c61\uff0c\u7b2c2\u4e2a\u53c2\u6570\u5c31\u662f\u8981\u81ea\u5b9a\u4e49\u5904\u7406\u7684\u65b9\u6cd5\u7684\u5408\u96c6(\u4e5f\u5c31\u662f\u4e2a\u5bf9\u8c61)\u3002 \u5f88\u62bd\u8c61\uff1f\u5176\u5b9e\u5c31\u548cjs\u4e2d\u7684Object.defineProperty\u5f88\u50cf(\u4e5f\u5c31\u662f\u8bbf\u95ee\u5668\u5c5e\u6027,vue2.x\u7684\u5e95\u5c42\u5c31\u662f\u7528\u5b83\u6765\u5b9e\u73b0\u7684)\u3002 Object.defineProperty \u5b9a\u4e49\u8bbf\u95ee\u5668\u5c5e\u6027\uff0c\u53ef\u4ee5\u5bf9\u67d0\u4e2a\u5c5e\u6027\u7684\u8bfb\u5199\u884c\u4e3a\u8fdb\u884c\u63a7\u5236\uff0c\u5728Proxy\u4e2d\u4e5f\u53ef\u4ee5\u505a\u5230\uff0c\u800c\u4e14Proxy\u66f4\u7075\u6d3b\u548c\u5f3a\u5927\uff0c\u5b83\u80fd\u505a\u5230\u5f88\u591a\u8bbf\u95ee\u5668\u5c5e\u6027\u505a\u4e0d\u5230\u7684\u4e8b\u60c5\u3002 \u6bd4\u5982\uff0c\u76d1\u542c\u5c5e\u6027\u5220\u9664\u4e8b\u4ef6(delete obj.prop;),in \u4e8b\u4ef6(&#8216;id&#8217; in obj;), apply \u8c03\u7528\u7b49\u3002 \u5148\u6765\u770b\u770b\uff0cproxy\u5bf9\u8c61\u6709\u54ea\u4e9b\u5185\u5bb9\u3002 var targetObj = { id : 1, name : &#8216;pxh&#8217;, age : 20, school : &#8216;\u5c0f\u5b66&#8217; } var handler = {}; \/\/ \u6b64\u5904\uff0c\u6211\u4eec\u5148\u4e0d\u5bf9targetObj\u7684\u884c\u4e3a\u8fdb\u884c\u5e72\u9884\uff0c\u6240\u4ee5\u4f20\u4e2a\u7a7a\u5bf9\u8c61\u8fdb\u53bb\u5373\u53ef\u3002 var proxy = new Proxy(targetObj,handler); console.log(proxy); \u767b\u5f55\u540e\u590d\u5236 \u770b\u770b\u6253\u5370\u7684proxy\u662f\u4ec0\u4e48\u9b3c\uff0c\u5982\u4e0b\u56fe\u3002 \u53ef\u4ee5\u770b\u5230\uff0cproxy\u5bf9\u8c61\u4e2d\uff0c\u5305\u542b\u4e86Handler\u5c5e\u6027\u548cTarget\u5c5e\u6027\u548cIsRevoked\uff0c\u5b83\u4eec\u7684\u503c\u5206\u522b\u662f\u6211\u4eec\u4f20\u5165\u7684handler\u4ee5\u53ca targetObj\u548cfalse\u3002 \u8fd9\u4e2aisRevoked\u8868\u793a\u662f\u5426\u53ef\u64a4\u9500\uff0c\u751f\u6210\u53ef\u64a4\u9500\u7684proxy\u5bf9\u8c61\u7528Proxy.revocable()\u65b9\u6cd5\uff0c\u5177\u4f53\u53ef\u53bbMDN\u67e5\u770b\u6587\u6863\u3002 2\u3001\u901a\u8fc7Proxy [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"class_list":["post-33421","post","type-post","status-publish","format-standard","hentry","category-19"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/33421","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=33421"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/33421\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=33421"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=33421"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=33421"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}