Method onKeyDown

app/static/js/keyboardstate.js:35–41

* @param {KeyboardEvent} evt - https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent

(evt)

   * @param {KeyboardEvent} evt - https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent
   */
  onKeyDown(evt) {
    const canonicalCode = keystrokeToCanonicalCode(evt);
    this._isKeyPressed[canonicalCode] = true;
    if (!isModifierCode(canonicalCode)) {
      this._fixInternalModifierStates(evt);
    }
  }

  /**
   * @param {KeyboardEvent} evt - https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent