• 金额自动补全两位小数

<el-input v-model.trim="form.invoice_price" clearable oninput="value=value.match(/\d+\.?\d{0,2}/,'')"  @blur="form.invoice_price=JEblurFn(form.invoice_price)"/>

function JEblurFn(value){return value=Number(value).toFixed(2)
}

• 限制只能输入正整数

 <el-input v-model="form.phone" maxlength="20" oninput="value=value.replace(/[^0-9]/g,'')"></el-input>

• 金额限制两位小数

<el-input v-model.trim="form.invoice_price" clearable oninput="value=value.match(/\d+\.?\d{0,2}/,'')"/>

• 金额限制两位数，支持输入负数

<el-input v-model.trim="form.invoice_price"  clearable oninput="value=value.replace(/^([0-9-]\d*\.?\d{0,2})?.*$/,'$1')"