vue 使用tinymce进行字数限制

　　　　setup: (ed) => {
          const vm = this
          ed.on(‘keyup‘, function (e) {
            vm.wordLimit(e)
          });
          ed.on(‘input‘, function (e) {
            vm.wordLimit(e)
          })
          ed.on(‘compositionstart‘, function (e) {
            vm.isChinese = false
          });
          ed.on(‘compositionend‘, function (e) {
            vm.isChinese = true
          })
        }

//字数限制
    wordLimit (e) {
      const vm = this
      let last = ‘‘
      let lastIndex = ‘‘
      let startVal = ‘‘
      let endVal = ‘‘
      if (e.target.innerText.length === 1000) {
        vm.htmlText = e.target.innerHTML
        //兼容输入法有可能会跳过1000
      } else if ((!vm.isChinese && e.target.innerText.length === 1001)) {
        last = e.target.innerText.substr(e.target.innerText.length - 1, 1)
        lastIndex = e.target.innerHTML.lastIndexOf(last)
        startVal = e.target.innerHTML.substring(0, lastIndex)
        endVal = e.target.innerHTML.substring(lastIndex + 1, e.target.innerHTML.length)
        vm.htmlText = startVal + endVal
      }
      if (e.target.innerText.length > 1000) {
        e.target.innerHTML = vm.htmlText
        var ifra = document.getElementById("tinymces_ifr");
        this.keepLastIndex(ifra.contentWindow.document.getElementById(‘tinymce‘), ifra.contentWindow)
        if (!this.limitNum) {
          this.$message.error(‘长度限制为1000个字符‘)
          this.limitNum++
        }
      }
    },