1. 针对普通的 el-input

<el-form-item prop="sortNo"><el-input v-model="form.sortNo"  @input="val => (form.sortNo = handlerInput(val))"> </el-input>
</el-form-item>

handlerInput(val) {if (val) {if (/^0*$/.test(val)) {return "";}val = val.replace(/^0+/, "").replace(/[^\d]/g, "");}if (val > 10000) {val = "10000";}return val;
},

2. 针对 el-input-number

它有自带的属性：percision（精度）

<el-input-numberv-model.trim="form.imageCount"placeholder="请输入"controls-position="right":min="1":max="10":precision="0"
/>