js处理数字输入配合键盘控制

    // 最大长度5，只能输入正整数
      if (val.length > 1 && val[0] == 0) {
        // val = val.replace("/0", "/"); //这个是处理数字的，这里不适应
        val = val.substr(1);
      }
      if (val.length > 5) {
        val = val.slice(0, 5);
      }
      console.log(val);
      val = val.replace(/[^0-9]/gi, "");

    只能输入数字和+ 

val=va.replace(/[^\d^\+]/,'')"  //type=number就限制不了中文+

  <el-input
                    type="number"
                    v-model.number="scope.row.newquotaObj.quotaScore"
                    size="small"
                    @input="(val) => changInput(val, scope.row, scope.$index)"
                    @keydown.native="channelInputLimit"
                  ></el-input>

 

    channelInputLimit(e) {
      let key = e.key;
      // 不允许输入'e'和'.'
      if (key === "e" || key === "." || key === "-" || key === "+") {
        e.returnValue = false;
        return false;
      }
      return true;
    },