[BlockInputKeys] Block an array of keys on inputs #form

BlockInputKeys.js

class BlockInputKeys {
  constructor(INPUT_TYPE, BLOCKED_KEYS) {
    this.INPUT_TYPE = INPUT_TYPE;
    this.BLOCKED_KEYS = BLOCKED_KEYS;
    this.NUMBER_INPUTS = document.querySelectorAll(this.INPUT_TYPE);
    this.init();
  }

  init() {
    for (let i = 0; i < this.NUMBER_INPUTS.length; i++) {
      const INPUT = this.NUMBER_INPUTS[i];

      INPUT.addEventListener('keydown', (e) => {
        if (this.BLOCKED_KEYS.indexOf(e.which) !== -1) {
          e.preventDefault();
        }
      })
    }
  }
}