How does JavaScript steal the constructor

This article will explain in detail how JavaScript steals constructors. Xiaobian thinks it is quite practical, so share it with you as a reference. I hope you can gain something after reading this article.

Since the prototype object of the subclass constructor is independent of the parent class, the subclass instance cannot call the properties or methods of the prototype object of the parent class.

Only the properties or methods of the parent class constructor can be inherited.

Properties or methods in the parent class constructor create a copy of each subclass instance, which is cumbersome.

examples

function A(name,age,sex){ this.name = name; this.age = age; this.sex = sex; this.arrs=[1,2,3]};function B(name,age,sex){ A.apply(this,arguments)}let C1 = new B('C1',18,'male');let C2 = new B('C2',18,'female');console.log(C1.name,C1.age,C1.sex,C1.arrs); //'C1' 18 'male' [1,2,3]console.log(C2.name,C2.age,C2.sex,C2.arrs); //'C2' 18 'female' [1,2,3]C1.arrs.push(4);console.log(C1.arrs); //[1,2,3,4]console.log(C2.arrs); //[1,2,3] About "JavaScript how to steal constructor" This article is shared here, I hope the above content can be of some help to everyone, so that you can learn more knowledge, if you think the article is good, please share it for more people to see.