Evernight/DirectionInput.js at main · Zara721/Evernight · GitHub

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class DirectionInput {
    constructor() {
      this.heldDirections = [];

      this.map = {
        "KeyW":"up",
        "KeyS":"down",
        "KeyA":"left",
        "KeyD":"right",

        "ArrowUp":"up",
        "ArrowDown":"down",
        "ArrowLeft":"left",
        "ArrowRight":"right",
      }
    }

    get direction() {
      return this.heldDirections[0];
    }

    init() {
      document.addEventListener("keydown", (e) => {
        const dir = this.map[e.code];
        if (dir && this.heldDirections.indexOf(dir) === -1) {
          this.heldDirections.unshift(dir);
        }
      });

      document.addEventListener("keyup", (e) => {
        const dir = this.map[e.code];
        const index = this.heldDirections.indexOf(dir);
        if (index > -1) {
          this.heldDirections.splice(index, 1);
        }
      })

    }
  }