window.onload = function () {
    var dom = null;
    var observer = null
    var interval = setInterval(function () {
      dom = document.getElementsByClassName('ivu-modal-content ivu-modal-content-no-mask ivu-modal-content-drag')
      if (!!dom[0]) {
        console.log('计时')
        var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver
        let elementAll = document.querySelectorAll('.ivu-modal-content');
        for (let i = 0; i < elementAll.length; i++) {
          let element = document.querySelectorAll('.ivu-modal-content')[i]
            observer = new MutationObserver((mutationList) => {
              let top = getComputedStyle(element).getPropertyValue('top')
              let left = getComputedStyle(element).getPropertyValue('left')
              const leftMax = parseFloat(document.documentElement.getBoundingClientRect().width) - element.getBoundingClientRect().width
              const topMax = parseFloat(document.documentElement.getBoundingClientRect().height) - element.getBoundingClientRect().height
              console.log('topMax',topMax)
              console.log('top',parseFloat(top))
              if (top[0] == '-') {
                element.style.top = '2px'
              }
              if (left[0] == '-') {
                element.style.left = '2px'
              }
              if (parseFloat(left) > leftMax) {
                element.style.left = leftMax + 'px'
              }
              if (topMax<0) {
                if (parseFloat(top)>-topMax) {
                  element.style.top = -topMax + 'px'
                }
              }
              else{
                if (parseFloat(top) > topMax) {
                  element.style.top = topMax + 'px'
                }
              }
            })
            observer.observe(element, { attributes: true, attributeFilter: ['style'], attributeOldValue: true })

        }
      }
    }, 1000)

  }