elementui限制input输入框中小数点保留一位小数

        <el-input-number v-model="form.score" size="mini" :min="0" :step="1" :max="Number(form.questionScore)" @input.native="changeInput($event)"></el-input-number>



changeInput(e) {
      if (e.target.value.indexOf(".") >= 0) {
        e.target.value = e.target.value.substring(
          0,
          e.target.value.indexOf(".") + 2
        );
      }
    },