【需求记录】【Vue】【ElementUi】限制输入框输入九位整数四位小数

ps：日常工作中遇到的需求，随手记录之~

export default {
  data() {
    return {
       inputVal: "",
    };
  },
  watch: {
    inputVal(newVal, oldVal) {
    let reg = /^(\d{0,9})(\.(\d{0,4}))?$/g;
    if (!reg.test(newVal)) {
      if (newVal == "") {
        this.inputVal = "";
        return;
      }
      this.inputVal = oldVal;
    } else {
      this.inputVal = newVal;
    }
  },
 },
}