Creating a new object instance within its own constructor

While delving into the inner workings of the Prisma ORM source code, I stumbled upon this specific section that caught my attention:

export class MigrateDev implements Command {
  public static new(): MigrateDev {
    return new MigrateDev()
  }
  
  ...

This part has left me perplexed. How exactly does creating a new instance of the same class within its own constructor not lead to an infinite loop and eventual stack overflow?

Answer №1

It's quite straightforward - that isn't actually the constructor being called. Instead, it's just a static or class method referred to as new. This is possible in JavaScript because it allows for the use of reserved keywords like this.

In this particular scenario, executing MigrateDev.new() would essentially achieve the same result as new MigrateDev().

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