{"id":590,"date":"2024-04-04T21:26:38","date_gmt":"2024-04-04T13:26:38","guid":{"rendered":"https:\/\/fugary.com\/?p=590"},"modified":"2024-04-08T10:39:32","modified_gmt":"2024-04-08T02:39:32","slug":"%e7%ae%80%e5%8d%95%e7%90%86%e8%a7%a3vue2%e5%92%8cvue3%e5%93%8d%e5%ba%94%e5%bc%8f%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/fugary.com\/?p=590","title":{"rendered":"\u7b80\u5355\u7406\u89e3Vue2\u548cVue3\u54cd\u5e94\u5f0f\u539f\u7406"},"content":{"rendered":"

Vue<\/code>\u662f\u524d\u7aef\u6bd4\u8f83\u706b\u7684\u5f00\u53d1\u6846\u67b6\uff0cVue<\/code>\u4fee\u6539\u6570\u636e\u540e\u80fd\u591f\u7acb\u9a6c\u5728\u9875\u9762\u4e0a\u53cd\u5e94\u51fa\u6700\u65b0\u7684\u4fee\u6539\u7ed3\u679c\uff0c\u8fd9\u79cd\u5c31\u53eb\u6570\u636e\u54cd\u5e94\u5f0f\uff0c\u672c\u6587\u8bb2\u89e3\u4e00\u4e0bVue<\/code>\u54cd\u5e94\u5f0f\u539f\u7406\uff0c\u7406\u89e3Vue<\/code>\u80cc\u540e\u7684\u903b\u8f91\u3002<\/p>\n

\u6709\u4e00\u5b9a\u5f00\u53d1\u7ecf\u9a8c\u7684\u5e94\u8be5\u77e5\u9053\u5982\u679c\u8981\u4fee\u6539\u6570\u636e\u65f6\u6267\u884c\u5176\u4ed6\u4e1a\u52a1\u903b\u8f91\uff0c\u901a\u5e38\u9700\u8981\u901a\u8fc7\u62e6\u622a\u5668\u6765\u5b9e\u73b0\u3002<\/p>\n

Vue2\u54cd\u5e94\u5f0f<\/h3>\n

Vue2<\/code>\u54cd\u5e94\u5f0f\u539f\u7406\u662f\u901a\u8fc7Object.defineProperty<\/code>\u5b9e\u73b0\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u53ef\u4ee5\u7ed9\u5bf9\u8c61\u5b9a\u4e49\u5c5e\u6027\u63cf\u8ff0\u4fe1\u606f\uff0c\u91cc\u9762\u6709get<\/code>\u548cset<\/code>\u7684\u62e6\u622a<\/p>\n

\u5c5e\u6027\u63cf\u8ff0<\/h4>\n

\u6bcf\u4e2aJS<\/code>\u5bf9\u8c61\u90fd\u6709\u4e00\u7ec4\u63cf\u8ff0\u4fe1\u606f\uff0c\u5b9a\u4e49JS<\/code>\u6570\u636e\u80fd\u6267\u884c\u4e00\u4e9b\u4ec0\u4e48\u64cd\u4f5c\u3002<\/p>\n

const obj1 = {\n  name: "gary",\n  age: 18\n};\nconst descriptors1 = Object.getOwnPropertyDescriptor(obj1, 'name');\nconsole.log(descriptors1)<\/code><\/pre>\n
\u8f93\u51fa\u4e00\u4e9b\u4fe1\u606f\uff0c\u4ee5name<\/code>\u4e3a\u4f8b\uff0c\u5982\u679c\u81ea\u5b9a\u4e49\u6709get<\/code>\u548cset<\/code>\u8fd8\u6709get<\/code>\u548cset<\/code>\u4fe1\u606f\uff1a<\/p>\n
{\n  configurable: true, \/\/ \u662f\u5426\u53ef\u4ee5\u91cd\u65b0\u5b9a\u4e49\u5c5e\u6027\u63cf\u8ff0\u7b26\n  enumerable: true, \/\/ \u662f\u5426\u53ef\u4ee5\u8fed\u4ee3\uff0c\u5982\u679c\u914d\u7f6e\u6210false\uff0c\u904d\u5386\u65f6\u6ca1\u6709\u8be5\u5c5e\u6027\n  value: "gary", \/\/ \u6570\u636e\u503c\n  writable: true \/\/ \u662f\u5426\u53ef\u4ee5\u5199\n}<\/code><\/pre>\n
\u5c1d\u8bd5\u4fee\u6539\u5c5e\u6027\u63cf\u8ff0\u4fe1\u606fObject.defineProperty<\/code><\/p>\n
const obj1 = {\n  name: "gary",\n  age: 18,\n};\nObject.defineProperty(obj1, "name", {\n  configurable: false,\n  enumerable: false,\n  value: "gary",\n  writable: false,\n});\nfor (const key in obj1) { \/\/ \u904d\u5386\u7684\u65f6\u5019\u6ca1\u6709name\u4e86\uff0c\u5b9e\u9645\u53ef\u4ee5\u8bfb\u53d6\u5230name\n  console.log(key);\n}<\/code><\/pre>\n
\u6709\u4e86\u57fa\u7840\u4e4b\u540e\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u89e3\u8bfbVue2<\/code>\u54cd\u5e94\u5f0f\u539f\u7406\u4e86<\/p>\n
\u54cd\u5e94\u5f0f\u539f\u7406<\/h4>\n
Vue2<\/code>\u5728data<\/code>\u51fd\u6570\u8fd4\u56de\u6570\u636e\u4e2d\uff0c\u4fee\u6539\u5bf9\u8c61\u5b9a\u4e49\uff0c\u63d2\u5165\u4f9d\u8d56\u641c\u96c6\u4e0e\u89e6\u53d1\u4f9d\u8d56\u7684\u4ee3\u7801<\/p>\n
const obj = {name:'gary', age: 19}\nconst objCache = {...obj}\nfor(const key in obj) {\n    Object.defineProperty(obj, key, {\n        get(){\n            console.log(`\u62e6\u622aget ${key},\u641c\u96c6\u4f9d\u8d56`)\n            return objCache[key]\n        },\n        set(value) {\n            console.log(`\u62e6\u622aset ${key} = ${value}\uff0c\u89e6\u53d1\u4f9d\u8d56`)\n            objCache[key] = value\n        }\n    })\n}\nobj.name\nobj.age\nobj.name = 'gary1'\nobj.age = 18<\/code><\/pre>\n
\u7f3a\u70b9<\/h4>\n
    \n
  1. \u7531\u4e8e\u662f\u904d\u5386\u5bf9\u8c61\uff0c\u56e0\u6b64\u6027\u80fd\u76f8\u5bf9\u8981\u5dee\u4e00\u70b9<\/li>\n
  2. \u5bf9\u8c61\u65b0\u589e\u7684\u5c5e\u6027\u7531\u4e8e\u6ca1\u6709\u91cd\u65b0\u5b9a\u4e49\u8fc7\u5c5e\u6027\uff0c\u56e0\u6b64\u4e0d\u80fd\u54cd\u5e94<\/li>\n<\/ol>\n
    Vue3\u54cd\u5e94\u5f0f<\/h3>\n
    Vue2<\/code>\u5b58\u5728\u4e00\u4e9b\u7f3a\u70b9\uff0c\u56e0\u6b64Vue3<\/code>\u8bde\u751f\u4e86\uff0c\u6027\u80fd\u66f4\u4f18\u79c0\uff0c\u4f46\u662f\u56e0\u4e3a\u4f7f\u7528Proxy<\/code>\uff0c\u90e8\u5206\u5f88\u8001\u7684\u6d4f\u89c8\u5668\u4e0d\u652f\u6301\uff0c\u76ee\u524d\u8001\u6d4f\u89c8\u5668\u57fa\u672c\u90fd\u9000\u51fa\u5e02\u573a\u4e86\u3002<\/p>\n
    Proxy\u4ecb\u7ecd<\/h4>\n
    Proxy<\/code> \u5bf9\u8c61\u5305\u88c5\u53e6\u4e00\u4e2a\u5bf9\u8c61\u5e76\u62e6\u622a\u8bf8\u5982\u8bfb\u53d6\u548c\u5199\u5165\u5c5e\u6027\u548c\u5176\u4ed6\u64cd\u4f5c\uff0c\u548c\u524d\u9762\u7684defineProperty<\/code>\u4f3c\u4e4e\u6709\u70b9\u7c7b\u4f3c\uff0c\u4e0d\u8fc7Proxy<\/code>\u4ee3\u7406\u6574\u4e2a\u5bf9\u8c61\u7684\u64cd\u4f5c\uff0c\u4e0d\u7528\u9488\u5bf9\u6bcf\u4e2a\u5c5e\u6027\u53bb\u505a\u5305\u88c5\uff0c\u4f46\u662f\u5982\u679c\u5c5e\u6027\u662f\u5bf9\u8c61\uff0c\u5728\u8bbf\u95ee\u5230\u8be5\u5c5e\u6027\u7684\u65f6\u5019\u8fd8\u662f\u8981\u518d\u6b21\u7528Proxy<\/code>\u4ee3\u7406\u5b50\u5bf9\u8c61\u7684\u8bbf\u95ee\u3002<\/p>\n
    \u6ce8\u610f\u539f\u59cb\u5bf9\u8c61\u548cProxy<\/code>\u5bf9\u8c61\u5b9e\u9645\u662f\u4e24\u4e2a\u5bf9\u8c61\uff0c\u65e0\u8bba\u4fee\u6539\u539f\u59cb\u5bf9\u8c61\u8fd8\u662fProxy<\/code>\u5bf9\u8c61\u5c5e\u6027\uff0c\u90fd\u4f1a\u5f71\u54cd\u539f\u59cb\u5bf9\u8c61\u7684\u503c\uff0c\u4f46\u662f\u5982\u679cProxy<\/code>\u4e2d\u5b9a\u4e49\u6709\u54cd\u5e94\u4ee3\u7801\uff0c\u8fd9\u4e9b\u54cd\u5e94\u4ee3\u7801\u5c06\u4e0d\u4f1a\u6267\u884c\uff0c\u8fd9\u70b9\u548cObject.defineProperty<\/code>\u662f\u4e0d\u4e00\u6837\u7684\u3002<\/p>\n
    const obj = {}\nconst handler = {} \/\/ handler\u4e0d\u505a\u4efb\u4f55\u5904\u7406\nconst proxy = new Proxy(obj, handler)\nproxy.name = 'gary'\nproxy.age = 19\nconsole.log(obj) \/\/ \u4fee\u6539proxy\u4f1a\u81ea\u52a8\u53cd\u5e94\u5230\u539f\u59cb\u5bf9\u8c61\u4e0a\uff0c\u76f4\u63a5\u7a7f\u900f\u8fc7\u53bb<\/code><\/pre>\n
    Proxy<\/code>\u7684Handler<\/code>\u652f\u6301\u7684\u65b9\u6cd5\u4ee5\u53ca\u89e6\u53d1\u65f6\u673a\u5982\u4e0b\uff1a<\/p>\n
    \u53c2\u8003\uff1ahttps:\/\/developer.mozilla.org\/en-US\/docs\/Web\/JavaScript\/Reference\/Global_Objects\/Proxy#object_internal_methods<\/a><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    \u5185\u90e8\u65b9\u6cd5<\/th>\nHandler \u65b9\u6cd5<\/th>\n\u89e6\u53d1\u65f6\u673a<\/th>\n<\/tr>\n<\/thead>\n
    [[Get]]<\/code><\/td>\nget<\/code><\/td>\n\u8bfb\u53d6\u5c5e\u6027\uff1aobj.name<\/code><\/td>\n<\/tr>\n
    [[Set]]<\/code><\/td>\nset<\/code><\/td>\n\u5199\u5165\u5c5e\u6027:  obj.name = ''<\/code><\/td>\n<\/tr>\n
    [[HasProperty]]<\/code><\/td>\nhas<\/code><\/td>\nin<\/code> \u64cd\u4f5c\u7b26<\/td>\n<\/tr>\n
    [[Delete]]<\/code><\/td>\ndeleteProperty<\/code><\/td>\ndelete<\/code> \u64cd\u4f5c\u7b26<\/td>\n<\/tr>\n
    [[Call]]<\/code><\/td>\napply<\/code><\/td>\n\u51fd\u6570\u8c03\u7528\uff08\u4ec5\u51fd\u6570\uff09<\/td>\n<\/tr>\n
    [[Construct]]<\/code><\/td>\nconstruct<\/code><\/td>\nnew<\/code> \u64cd\u4f5c\u7b26\uff08\u51fd\u6570\uff09<\/td>\n<\/tr>\n
    [[GetPrototypeOf]]<\/code><\/td>\ngetPrototypeOf<\/code><\/td>\nObject.getPrototypeOf<\/a><\/td>\n<\/tr>\n
    [[SetPrototypeOf]]<\/code><\/td>\nsetPrototypeOf<\/code><\/td>\nObject.setPrototypeOf<\/a><\/td>\n<\/tr>\n
    [[IsExtensible]]<\/code><\/td>\nisExtensible<\/code><\/td>\nObject.isExtensible<\/a><\/td>\n<\/tr>\n
    [[PreventExtensions]]<\/code><\/td>\npreventExtensions<\/code><\/td>\nObject.preventExtensions<\/a><\/td>\n<\/tr>\n
    [[DefineOwnProperty]]<\/code><\/td>\ndefineProperty<\/code><\/td>\nObject.defineProperty<\/a>, Object.defineProperties<\/a><\/td>\n<\/tr>\n
    [[GetOwnProperty]]<\/code><\/td>\ngetOwnPropertyDescriptor<\/code><\/td>\nObject.getOwnPropertyDescriptor<\/a>, for..in<\/code>, Object.keys\/values\/entries<\/code><\/td>\n<\/tr>\n
    [[OwnPropertyKeys]]<\/code><\/td>\nownKeys<\/code><\/td>\nObject.getOwnPropertyNames<\/a>, Object.getOwnPropertySymbols<\/a>, for..in<\/code>, Object.keys\/values\/entries<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u54cd\u5e94\u5f0f\u539f\u7406<\/h4>\n
    \u6211\u4eec\u7528Proxy<\/code>\u6765\u6a21\u62df\u5bf9\u8c61\u8bbf\u95ee\u8fc7\u7a0b\uff0cVue3<\/code>\u4e2d\u53ebEffect<\/code>\uff08\u526f\u4f5c\u7528\uff09<\/p>\n
    const obj = {name:'gary', age: 19}\nconst handler = {\n    get(target, key){\n        console.log(`\u62e6\u622aget ${key},\u641c\u96c6\u4f9d\u8d56`)\n        return target[key]\n    },\n    set(target, key, value) {\n        console.log(`\u62e6\u622aset ${key} = ${value}\uff0c\u89e6\u53d1\u526f\u4f5c\u7528`)\n        target[key] = value\n    }\n}\nconst proxy = new Proxy(obj, handler)\nobj.name\nobj.name = 'gary1' \/\/ \u4fee\u6539\u751f\u6548\u4e0d\u8fc7\u4e0d\u4f1a\u89e6\u53d1\u526f\u4f5c\u7528\nproxy.name\nproxy.name = 'gary2' \/\/ \u4fee\u6539\u751f\u6548\u89e6\u53d1\u526f\u4f5c\u7528<\/code><\/pre>\n
    \u81f3\u6b64\u7406\u89e3\u4e86Vue<\/code>\u54cd\u5e94\u5f0f\u539f\u7406\uff0c\u65b9\u4fbf\u5728\u4f7f\u7528Vue<\/code>\u7684\u65f6\u5019\u5927\u4f53\u4e86\u89e3\u5176\u8fd0\u884c\u673a\u5236\u3002<\/p>\n
    \u5173\u4e8eReflect<\/h4>\n
    \u4e0a\u9762\u7684\u5199\u6cd5\u5728\u666e\u901a\u60c5\u51b5\u4e0b\u4f3c\u4e4e\u6ca1\u6709\u4ec0\u4e48\u95ee\u9898\uff0c\u4e0d\u8fc7\u5982\u679c\u6709\u7ee7\u627f\u5173\u7cfb\u4e14\u81ea\u5b9a\u4e49\u4e86getter<\/code>\u7684\u65f6\u5019\u8fd0\u884c\u5c31\u6709\u70b9\u95ee\u9898\u4e86\u3002<\/p>\n
    const obj = {\n  name: "gary",\n  age: 19,\n  get info() { \n    return `${this.name}: ${this.age}`\n  }\n};\nconst handler = {\n  get(target, key) {\n    console.log(`\u62e6\u622aget ${key},\u641c\u96c6\u4f9d\u8d56`);\n    return target[key];\n  },\n  set(target, key, value) {\n    console.log(`\u62e6\u622aset ${key} = ${value}\uff0c\u89e6\u53d1\u526f\u4f5c\u7528`);\n    target[key] = value;\n  },\n};\nconst proxy = new Proxy(obj, handler);\nconst child = {\n    __proto__: proxy, \/\/ \u539f\u578b\u7ee7\u627f\n    name: 'child'\n}\nchild.info \/\/ 'gary: 19' \u8f93\u51fa\u4e0d\u6b63\u786e<\/code><\/pre>\n
    \u5982\u679c\u7528\u666e\u901a\u51fd\u6570\u6ca1\u6709\u95ee\u9898\uff0c\u56e0\u4e3aobj<\/code>\u4f7f\u7528\u4e86\u4ee3\u7406\uff0c\u4ee3\u7406\u4e86getter<\/code>\u65b9\u6cd5\u5f15\u8d77\u7684\u95ee\u9898\uff0c\u9700\u8981\u4fee\u6539\uff1a<\/p>\n
    const obj = {\n  name: "gary",\n  age: 19,\n  get info() {\n    return `${this.name}: ${this.age}`\n  }\n};\nconst handler = {\n  get(target, key, receiver) {\n    console.log(`\u62e6\u622aget ${key},\u641c\u96c6\u4f9d\u8d56`);\n    return Reflect.get(target, key, receiver);\n  },\n  set(target, key, value, receiver) { \/\/ target\uff1a\u539f\u59cb\u5bf9\u8c61, key\uff1a\u5bf9\u8c61\u5c5e\u6027, value\uff1a\u5bf9\u8c61\u503c, receiver\uff1a\u5b9e\u9645\u5bf9\u8c61\uff0cthis\u6307\u5411\n    console.log(`\u62e6\u622aset ${key} = ${value}\uff0c\u89e6\u53d1\u526f\u4f5c\u7528`);\n    return Reflect.set(target, key, value, receiver)\n  },\n};\nconst proxy = new Proxy(obj, handler);\nconst child = {\n    __proto__: proxy,\n    name: 'child'\n}\nchild.info \/\/ 'child: 19' \u8f93\u51fa\u6b63\u786e<\/code><\/pre>\n
    \u8fd9\u5c31\u662f\u6bd4\u8f83\u5b8c\u5584\u7684\u5199\u6cd5\uff0c\u7528Reflect<\/code>\u6765\u5199\u5165\u548c\u8bfb\u53d6\u539f\u59cb\u5bf9\u8c61\u6570\u636e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    Vue\u662f\u524d\u7aef\u6bd4\u8f83\u706b\u7684\u5f00\u53d1\u6846\u67b6\uff0cVue\u4fee\u6539\u6570\u636e\u540e\u80fd\u591f\u7acb\u9a6c\u5728\u9875\u9762\u4e0a\u53cd\u5e94\u51fa\u6700\u65b0\u7684\u4fee\u6539\u7ed3\u679c\uff0c\u8fd9\u79cd\u5c31\u53eb\u6570\u636e\u54cd\u5e94\u5f0f\uff0c\u672c\u6587\u8bb2 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[153,152,149,150,151],"_links":{"self":[{"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/posts\/590"}],"collection":[{"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fugary.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=590"}],"version-history":[{"count":3,"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/posts\/590\/revisions"}],"predecessor-version":[{"id":598,"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/posts\/590\/revisions\/598"}],"wp:attachment":[{"href":"https:\/\/fugary.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=590"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fugary.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=590"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fugary.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}