javascript - 从 Javascript 构造函数内部调用函数

Question

是否可以从 Javascript 构造函数内部调用函数，如下所示:

class Blockchain {

   constructor(genesisBlock) {

     this.blocks = []
     addBlock(genesisBlock)
   }

   addBlock(block) {

      if(this.blocks.length == 0) {
        block.previousHash = "0000000000000000"
      }
   }

}

我得到以下信息:

addBlock is not defined

Answer 1

是的，该方法是一个原型(prototype)方法，需要从类的实例中调用(通过使用 this):

...
constructor(genesisBlock) {
    this.blocks = []
    this.addBlock(genesisBlock)
}
...