{"id":12962,"date":"2023-11-29T10:11:51","date_gmt":"2023-11-29T02:11:51","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=12962"},"modified":"2023-11-29T10:11:55","modified_gmt":"2023-11-29T02:11:55","slug":"qian-duan-mian-shi-tijs-zhong-shen-me-shi-lei","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/29\/qian-duan-mian-shi-tijs-zhong-shen-me-shi-lei\/","title":{"rendered":"\u524d\u7aef\u9762\u8bd5\u9898\uff1aJS\u4e2d\u4ec0\u4e48\u662f\u7c7b\uff1f"},"content":{"rendered":"

\u7c7b(class)\u662f\u5728JS\u4e2d\u7f16\u5199\u6784\u9020\u51fd\u6570\u7684\u65b0\u65b9\u6cd5\u3002\u5b83\u662f\u4f7f\u7528\u6784\u9020\u51fd\u6570\u7684\u8bed\u6cd5\u7cd6\uff0c\u5728\u5e95\u5c42\u4e2d\u4f7f\u7528\u4ecd \u7136\u662f\u539f\u578b\u548c\u57fa\u4e8e\u539f\u578b\u7684\u7ee7\u627f\u3002
\n\/\/ES5 Version
\nfunction Person(firstName, lastName, age, address) {
\nthis. firstName = firstName\uff1b
\nthis. lastName = lastName\uff1b
\nthis.age = age\uff1b
\nthis. address = address\uff1b
\n}
\nPerson. self = function() {
\nreturn this\uff1b
\n}
\nPerson. prototype. toString = function () {
\nreturn "[object Person]"\uff1b
\n}
\nPerson, prototype. getFullName = function (){
\nreturn this. firstName + " " + this. lastName\uff1b
\n}
\n\/\/ES6 Version
\nclass Person {
\nconstructor(firstName, lastName, age, address) {
\nthis. lastName = lastName\uff1b
\nthis. firstName = firstName\uff1b
\nthis. age = age\uff1b
\nthis. address = address\uff1b
\n}
\nstatic self() {
\nreturn this\uff1b
\n}
\ntoString () {
\nreturn "[object Person]";
\n}
\ngetFullName(){
\nreturn {this. firstName} <\/span>{this. lastName}<\/code>\uff1b
\n}
\n}
\n\u91cd\u5199\u65b9\u6cd5\u5e76\u4ece\u53e6\u4e00\u4e2a\u7c7b\u7ee7\u627f\u3002
\n\/\/ES5 Version
\nEmployee.prototype = Object.create (Person. prototype);
\nfunction Employee(firstName, lastName, age, address, jobTitle, yearStarted) {
\nPerson. call (this, firstName, lastName, age, address)\uff1b
\nthis.jobTitle = jobTitle\uff1b
\nthis. yearStarted = yearStarted;
\n}
\nEmployee. prototype. describe = function () {
\nreturn I am {this. getFulIName ()} and I have a position of<\/span> {this. jobTitle} and I started at
\n${this. yearStarted}<\/code>\uff1b
\n}
\nEmployee. prototype. toString = function () {
\nreturn "[object Employee]";
\n}
\n\/\/ES6 Version
\nclass Employee extends Person { \/\/Inherits from "Person" class
\nconstruetor(firstName, lastName, age, address, jobTitle, yearStarted) {
\nsuper(firstName, lastName, age, address)\uff1b
\nthis. jobTitle = jobTitle\uff1b
\nthis. yearStarted = yearStarted\uff1b
\n}
\ndescribe () {
\nreturn I am {this. getFulIName()} and I have a position of<\/span>{this. jobTitle} and I started at ${this. yearStarted}\uff1b
\n}
\ntoString() { \/\/ Overriding the "toString" method of "Person"
\nreturn "[object Employee]"\uff1b
\n}
\n}
\n\u6240\u4ee5\u6211\u4eec\u8981\u600e\u4e48\u77e5\u9053\u5b83\u5728\u5185\u90e8\u4f7f\u7528\u539f\u578b\uff1f
\nclass Something {
\n}
\nfunction AnotherSomething() {
\n}
\nconst as = new AnotherSomething()\uff1b
\nconst s = new Something()\uff1b
\nconsole. log(typeof Something)\uff1b \/\/ "function"
\nconsole. log(typeof AnotherSomething)\uff1b \/\/ "function"
\nconsole. log (as. toString()) \uff1b \/\/ " [object Object]"
\nconsole. log (as. toString()) \uff1b \/\/ " [object Object]"
\nconsole. log(as. toString = Object, prototype. toString)\uff1b \/\/ true
\nconsole. log(s. toString = Object, prototype. toString) \uff1b \/\/ true<\/p>\n","protected":false},"excerpt":{"rendered":"

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