怎么判断点击是靠近屏幕偏右边还是偏左边

Question

如何判断当我点击时候,我点击的位置是靠近左边或者右边的屏幕最近

Answer 1

document.addEventListener('click', function (e) {
  // console.log(e);
  const leftInstance = e.screenX;
  const rightInstance = e.screenY;
  const screenWidth = window.innerWidth;
  if (leftInstance < (screenWidth / 2)) {
    alert('靠左边');
  } else {
    alert('靠右边');
  }
}, false)

Answer 2

获取屏幕宽度,获取点击时的坐标,判断x值是接近0还是接近屏幕宽度值,不就是接近左边或是右边？

Answer 3

document.onclick = function() {
    var clientX = event.clientX,
        isLeft = clientX < (document.documentElement.clientWidth / 2);
    console.log(isLeft ? 'left' : 'right');
};