<el-input> 限制只能输入数字，且得到的值是number类型，去除右侧箭头

<template>
    <el-input type="number" v-model.number="val" class="del-arrow"/>
</template>
<style scoped lang="scss">
    ::v-deep .del-arrow input::-webkit-outer-spin-button,
    ::v-deep .del-arrow input::-webkit-inner-spin-button {
        -webkit-appearance: none !important;
    }
    ::v-deep .del-arrow input[type="number"] {
        -moz-appearance: textfield;
    }
</style>