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immutable.js的list类型为什么可以在控制台识别,es中默认不是没有list类型吗?这是怎么做到的?
学习是最好的投资！
chrome控制台中输入：
class List{constructor(){this.size=0;}} let a =new List() a
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
chrome控制台中输入：