captureMouseMoves()

in packages/fbjs/src/dom/DOMMouseMoveTracker.js [50:72]

• 22 lines of code
• 4 McCabe index (conditional complexity)

  captureMouseMoves(/*object*/ event) {
    if (!this._eventMoveToken && !this._eventUpToken) {
      this._eventMoveToken = EventListener.listen(
        this._domNode,
        'mousemove',
        this._onMouseMove
      );
      this._eventUpToken = EventListener.listen(
        this._domNode,
        'mouseup',
        this._onMouseUp
      );
    }

    if (!this._isDragging) {
      this._deltaX = 0;
      this._deltaY = 0;
      this._isDragging = true;
      this._x = event.clientX;
      this._y = event.clientY;
    }
    event.preventDefault();
  }