getPosFormEle.js

[javascript]代码库

var getPosFormEle = (function(ele) {
      var x,y;
      var elex = ele.getBoundingClientRect().left;
      var eley = ele.getBoundingClientRect().top;
      var st = document.body.scrollTop;
      document.onScroll = function(){
        st = document.body.scrollTop;
        // console.log(document.body.scrollTop)
      }
      return function(e) {
        x = Math.round(e.pageX - elex);
        y = Math.round(e.pageY - eley-st);
        // console.log('getPosFormCanvas,x:',x,', y:',y);
        return {x:x,y:y};
      }
  })(ele);