ts instantiate a class passed as parameter

Issue

I was trying to implement a neat way to build multiple Plants (inspired by plants vs zombies). To make it easy to add more plant Types I wanted to make the cost and dmg of the plant static so I can set it once for all Plants of this type.

In this case I have only one Plant (Sunflower), now I would like to instantiate the Sunflowerplant. In the build method in the Cell class.

When doing it like this I get the error: Cannot create an instance of an abstract class. which is understandable for me. So is there a way to only be able to pass non abstract classes which extend from Plant as a Parameter for the build() methode or do I have to implement some sort of if (!c isAbstract)

abstract class Plant {
  public static dmg: number;
  public static cost: number;

  constructor(cell: Cell) {
    this.cell = cell;
  }

  cell: Cell;
}

// I would like to create more Plants like this
class Sunflower extends Plant {
  public static dmg = 0;
  public static cost = 50;
  cell: Cell;

  constructor(cell: Cell) {
    super(cell);
  }
}

class Cell {
  build(c: typeof Plant) {
    if (c.cost <= game.money) {
      this.plant = new c(this); //Cannot create an instance of an abstract class.
      game.money -= c.cost;
    }
  }
}

// this is how I would build plants.
let c = new Cell();
c.build(Sunflower);

Solution

You can do it like this:

class Cell {
    
  build<T extends Plant>(plant: (new (cell:Cell) => T)) {
    const plantInstance = new plant(this); 
  }
}

Playground link

Answered By - Jamiec