首頁猿問如下求解釋 js prototype

如下求解釋 js prototype

JavaScript

鴻蒙傳說 2018-12-13 16:14:41

function employee(name,job,born){this.name=name;this.job=job;this.born=born;this.salary=12;}let c=123;var bill=new employee('xx','ss','pp');employee.prototype.salary=function(){ return this.born;}alert((bill.salary+'--000---'+employee.prototype.salary()));var alise=new employee('xx','ss','pp');alert((alise.salary+'--000---'+alise.salary()));

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1 回答

DIEA

TA貢獻1820條經(jīng)驗獲得超3個贊

第一個是12--000---undefined，employee.prototype.salary()，this.born沒賦值，return undefined;
第二個alise.salary()出錯，alise.salary是this.salary，為12，employee中有this.salary=12，把employee.prototype.salary覆蓋，找的是this.salary(),報錯

反對回復 2019-01-16