只允许输入数字正整数

    <el-input v-model="panding.num" @input="changeNum" @change="rese"></el-input>
    
    rese(val) {
        if (!val) {
          this.panding.num = 1
        }
      },

    changeNum(value) {
        this.panding.num = this.panding.num.replace(/[^\d]/g, '').replace(/^0+/, '');
     },