[JavaScript知识库]vue 发送短信倒计时

//先定义
//倒计时秒数
      countdown:60,
      //按钮上的文字
      codeMsg:'获取验证码',
      //定时器
      timer:null,

//函数
// 获取验证码
    getCode() {
      this.$refs.form.validateField('phone',(errMsg)=>{
        if(errMsg){
          return false
        }else {
          // 验证码60秒倒计时
          if (!this.timer) {
            this.$axios.post(urlGetSmsCode,{'name':this.ruleForm.phone}).then(res=>{
              if(res.code===200){
                this.setTime()
                this.$message.success(`发送成功`)
              }else{
                this.$message.error(res.msg)
              }
            }).catch(res=>{
              this.$message.error(res.data.message)
            })
          }
        }
      })
    },
    //倒计时
    setTime(){
      let _this = this;
      this.timer = setInterval(() => {
        if (_this.countdown > 0 && _this.countdown <= 60) {
          _this.countdown--;
          if (_this.countdown !== 0) {
            _this.codeMsg = "重新发送(" + _this.countdown + ")";
          } else {
            clearInterval(_this.timer);
            _this.codeMsg = "获取验证码";
            _this.countdown = 60;
            _this.timer = null;
          }
        }
      }, 1000)
    },

最后在用beforeDestroy函数去掉定时器

  beforeDestroy() {
    clearInterval(this.timer);
    this.timer = null;
  }