elementui+vue2 input输入框限制只能输入数字

方法1

自定义表单校验

<el-form :model="Formdata" ref="formRef" :rules="nodeFormRules" label-width="100px"><el-form-itemlabel="年龄"prop="age"><el-input v-model.number="Formdata.age"></el-input></el-form-item>
</el-form>

data() {var checkNumber = (rule, value, callback) => {// if (!value) {//   return callback(new Error('年龄不能为空'));// }if (value && !Number.isInteger(value)) {callback(new Error("请输入数字值"));} else {callback();}};return{nodeFormRules: {age: [{ validator: checkNumber, trigger: "blur" }],}}
}

方法2

只要给el-form标签加上prop和rules属性就可以了

<el-form :model="Formdata" ref="formRef" label-width="100px"><el-form-itemlabel="年龄"prop="age":rules="[{ required: true, message: '年龄不能为空'},{ type: 'number', message: '年龄必须为数字值'}]"><el-input v-model.number="Formdata.age"></el-input></el-form-item>
</el-form>

注意：
el-form标签的prop属性的值必须得和input框v-model绑定的值一致，否则校验无效

其他问题

一打开表单还没开始输入数据表单的校验就自动触发了
这就导致我的空表单出现了校验错误
在这里插入图片描述

解决

在表单页面mounted中或者打开表单页面之前移除表单项的校验结果，即在对应位置加上如下代码：

this.$nextTick(() => {setTimeout(() => {this.$refs.formRef.clearValidate(); // 移除表单项的校验结果}, 10);
});

补充

<el-form :model="ruleForm" status-icon :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm"><el-form-item label="密码" prop="pass"><el-input type="password" v-model="ruleForm.pass" autocomplete="off"></el-input></el-form-item><el-form-item label="确认密码" prop="checkPass"><el-input type="password" v-model="ruleForm.checkPass" autocomplete="off"></el-input></el-form-item><el-form-item label="年龄" prop="age"><el-input v-model.number="ruleForm.age"></el-input></el-form-item><el-form-item><el-button type="primary" @click="submitForm('ruleForm')">提交</el-button><el-button @click="resetForm('ruleForm')">重置</el-button></el-form-item>
</el-form>
<script>export default {data() {var checkAge = (rule, value, callback) => {if (!value) {return callback(new Error('年龄不能为空'));}setTimeout(() => {if (!Number.isInteger(value)) {callback(new Error('请输入数字值'));} else {if (value < 18) {callback(new Error('必须年满18岁'));} else {callback();}}}, 1000);};var validatePass = (rule, value, callback) => {if (value === '') {callback(new Error('请输入密码'));} else {if (this.ruleForm.checkPass !== '') {this.$refs.ruleForm.validateField('checkPass');}callback();}};var validatePass2 = (rule, value, callback) => {if (value === '') {callback(new Error('请再次输入密码'));} else if (value !== this.ruleForm.pass) {callback(new Error('两次输入密码不一致!'));} else {callback();}};return {ruleForm: {pass: '',checkPass: '',age: ''},rules: {pass: [{ validator: validatePass, trigger: 'blur' }],checkPass: [{ validator: validatePass2, trigger: 'blur' }],age: [{ validator: checkAge, trigger: 'blur' }]}};},methods: {submitForm(formName) {this.$refs[formName].validate((valid) => {if (valid) {alert('submit!');} else {console.log('error submit!!');return false;}});},resetForm(formName) {this.$refs[formName].resetFields();}}}
</script>