(vue)复合型输入框el-input输入数字类型，e，+，-等特殊符号可以输入

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效果

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代码

<el-form-item label="分数区间"><el-inputplaceholder="请输入内容"v-model.number="formInline.scoreIntervalValue"class="input-with-select"type="number"><el-selectv-model="formInline.scoreInterval"slot="prepend"placeholder="请选择"style="width:100px"><el-option v-for="item in gradeOptions" :key="item" :label="item" :value="item"></el-option></el-select></el-input>
</el-form-item>

gradeOptions: [">", "<", "="],