element-ui

<el-form-item label="大于等于：">
       <el-input @keyup.native="number" maxlength="3" v-model="form.days" placeholder="输入查询天数" class="input-with-select"></el-input><span>&nbsp;天</span> 
</el-form-item>

number(){
        this.form.days=this.form.days.replace(/[^\.\d]/g,'');
        this.form.days=this.form.days.replace('.','');
},

/*去掉type为number的箭头*/
input::-webkit-outer-spin-button, input::-webkit-inner-spin-button {
    -webkit-appearance: none;
}

input[type="number"] {
    -moz-appearance: textfield;
}