常见js表单验证方法（H5，layUI，amazeUI，vue）

记录一下自己用过的不同工具的表单验证方法，默认非表单提交而是用resultful请求风格提交。

原生H5验证：

<form id="form-demo" onsubmit="return false;">
    <input type="text" class="form-control modaltd" placeholder="请输入..." id="s01Form" required >
           

var form = document.getElementById("form-demo"),
submitBtn = document.getElementById("subBtn");
submitBtn.addEventListener("click", function() {
    var invalidFields = form.querySelectorAll(":invalid");
    let obj;
    for(var i=0,len=invalidFields.length;i<len;++i){
        obj = document.getElementById(invalidFields[i].id);
        if (obj.validity.valueMissing==true){
            obj.setCustomValidity('请输入值');
            return true;
        }else {
            obj.setCustomValidity('');
        }
    }
    //发送请求。。。
    return true;
});
           

LayUI：

<form  method="post" class="layui-form">
    <input id="q01" type="text" lay-verify="required" class="layui-input" name="q01">
           

layui.use('form', function(){
    var form = layui.form;

    //监听提交
    form.on('submit(formDemo)', function(data){
        obj=data.field;
        for (var item in obj){
            var value = obj[item];
            if (value==""||value==undefined){
                layer.msg("存在未选择信息");
                return false;
            }
        }
        create.add();
        return false;
    });
});
           

amazeUI

<form class="am-form" action="" method="post" id="sysUserForm">
    <input minlength="6" v-model="sysUser.vcUserName" class="am-form-field am-round" type="text" name="vcUserName" placeholder="设置用户名">
           

$('#sysUserForm').validator({
            validateOnSubmit: true,
            submit: function() {
                if(this.isFormValid()) {
                	sysUserFormDiv.submit();
                    return false;
                }
                return false;
            },
            onValid: function(validity) {
                $(validity.field).closest('.am-form-group').find('.am-alert').hide();
            },
            onInValid: function(validity) {
                var $field = $(validity.field);
                var $group = $field.closest('.am-form-group');
                var $alert = $group.find('.am-alert');
                // 使用自定义的提示信息 或 插件内置的提示信息
                var msg = $field.data('validationMessage') || this.getValidationMessage(validity);
                if (!$alert.length) {
                  $alert = $('<div class="am-alert am-alert-danger"></div>').hide().
                    appendTo($group);
                }
                $alert.html(msg).show();
              },
              patterns: {
            	  mobile:/^1(3|5|7|8){1}\d{9}$/,
            	  sid:/^20\d{10}$/,
            	  qq:/^[1-9][0-9]{4,14}$/,
            	  email:/^[a-zA-Z0-9_-][email protected][a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/
              },
              patternClassPrefix: 'js-pattern-'
		});
	})
           

VUE

1、在代码中，添加属性：:rule

<Form ref="loginForm" :model="form" :rules="rules" @keydown.enter.native="handleSubmit" class="form-con">
                        <FormItem prop="phone">
                            <Input v-model="form.phone" prefix="md-person" placeholder="请输入您的手机号" size="large" class="login-form-input" :maxlength="11"></Input>
                        </FormItem>
                        <FormItem prop="password">
                            <Input type="password" v-model="form.password" prefix="md-lock" placeholder="请输入您的密码" size="large" class="login-form-input" :maxlength="100"></Input>
                        </FormItem>
                        <FormItem prop="code">
                            <Input v-model="form.code" placeholder="请输入验证码" prefix="ios-barcode" size="large" class="login-form-input" :maxlength="4"></Input>
                            <img @click="refLoginImg" :src="loginImgSrc" class="login-img"/>
                        </FormItem>
                        <FormItem>
                            <Button @click="handleSubmit" :loading="submitLoading" type="info" long size="large" class="login-btn" icon="md-log-in">
                                <span v-if="!submitLoading">立即登录</span>
                                <span v-else>正在登录，请稍候...</span>
                            </Button>
                        </FormItem>
                    </Form>
           

2.新建一个文件（validate.js）定义验证规则

如果不是VUE项目，直接定义js方法也行的

/** 这个文件只允许放表单验证方法 **/

//验证手机号
export function isPhone(rule, value, callback) {
    if (!value) {
        return callback(new Error('输入不可以为空'));
    }
    var pattern = /^1[34578]\d{9}$/
    if(pattern.test(value)){
        return callback()
    }
    return callback(new Error('输入的手机号错误'))
}
           

3、在页面(xx.vue)中引入验证规则定义的文件，并在export default中定义rule规则，使用语法：{validator:验证方法,trigger:验证触发} validator

如果不是vue项目，直接在页面的vue实例中加rules属性也可行的

rules: {
                    phone: [
                        { required: true, message: '手机号不能为空', trigger: 'blur' },
                        { type: 'string', min: 11, message: '手机号不允许小于11位', trigger: 'blur' },
                        { validator: isPhone, trigger: 'blur' },
                    ],
                    password: [
                        { required: true, message: '密码不能为空', trigger: 'blur' },
                        { type: 'string', min: 6, message: '密码不允许小于6位', trigger: 'blur' },
                    ],
                    code: [
                        { required: true, message: '验证码不能为空', trigger: 'blur' },
                        { type: 'string', min: 4, message: '验证码必须是4位', trigger: 'blur' },
                    ],
                },