從構造函數調用類方法時出現錯誤。有沒有可能從構造函數調用一個方法?我試圖從派生類的構造函數中調用基類方法,但仍然出現錯誤。從構造函數調用類方法
'use strict';
class Base {
constructor() {
this.val = 10;
init();
}
init() {
console.log('this.val = ' + this.val);
}
};
class Derived extends Base {
constructor() {
super();
}
};
var d = new Derived();
➜ js_programs node class1.js /media/vi/DATA/programs/web/js/js_programs/class1.js:7 init(); ^
ReferenceError: init is not defined at Derived.Base (/media/vi/DATA/programs/web/js/js_programs/class1.js:7:9) at Derived (/media/vi/DATA/programs/web/js/js_programs/class1.js:18:14) at Object. (/media/vi/DATA/programs/web/js/js_programs/class1.js:23:9) at Module._compile (module.js:435:26) at Object.Module._extensions..js (module.js:442:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:311:12) at Function.Module.runMain (module.js:467:10) at startup (node.js:136:18) at node.js:963:3 ➜ js_programs