element input number e

<el-input
         @keydown.native="keydown"
         style="width:70%; margin: 10px 20px"
         type="number"
         clearable
         v-model="number"></el-input>

// methods

keydown(e) {
      let key = e.key;
      let arr = ["e", "+", "-"];
      if (arr.includes(key)) {
        e.returnValue = false;
        return false;
      }
      return true;
    },