类函数不断在函数内重新运行

Question

class AddSlider {
  constructor(elem, dir){
    this.elem = elem;
    this.dir = dir;
    this.slider = document.getElementsByClassName(this.elem)[0];
    this.sliderHandle = document.createElement('div');
  }

  /*Add handle to element and add styles depending on direction slider is needed to go*/
  build() {
    this.sliderHandle.classList.add('slider__handle');

    if (this.dir === 'right') {
      this.sliderHandle.style.right = 0;
      this.sliderHandle.style.top = 0;
      this.sliderHandle.style.width = '10px';
      this.sliderHandle.style.height = '100%';
    }
    if (this.dir === 'bottom') {
      this.sliderHandle.style.bottom = 0;
      this.sliderHandle.style.width = '100%';
      this.sliderHandle.style.height = '10px';
    }

    this.slider.appendChild(this.sliderHandle);
  }

  /*Add dragging class for styles when dragging, do resize sum and add it live as inline style*/
  Resize(e) {
    let cont = document.getElementsByClassName('slider-container')[0];

    this.slider.classList.add('dragging');
    this.sliderHandle.classList.add('dragging');

    if(this.dir === 'right') {
      this.slider.style.maxWidth = cont.offsetWidth + 'px';
      this.slider.style.width = (e.clientX - this.slider.offsetLeft) + 'px'; 
    }

    if(this.dir === 'bottom') {
      this.slider.style.maxHeight = '500px';
      this.slider.style.height = (e.clientY - this.slider.offsetTop) + 'px';
    }
  }

  /*Add events listeners when moving mouse and mouse up to window*/
  initResize() {
    window.addEventListener('mousemove', this.Resize.bind(this));
    window.addEventListener('mouseup', this.stopResize.bind(this));
  }

  /*Remove event listeners and classes*/
  stopResize() {
    console.log('STOPPED!!!');
    this.slider.classList.remove('dragging');
    this.sliderHandle.classList.remove('dragging');
    window.removeEventListener('mousemove', this.Resize);
    window.removeEventListener('mouseup', this.stopResize);
  }

  /*init*/
  init() {
    this.build();
    this.sliderHandle.addEventListener('mousedown', this.initResize.bind(this));
  }

}

let componentSlider = new AddSlider('slider', 'bottom');
componentSlider.init();

有人知道为什么resize函数一直在运行，而stopResize函数不会永久删除类和窗口监听器吗？ stopResize函数控制器记录文本并删除类，但类会立即添加回来，滑块不会停止移动。