基于angularJS的表单验证指令介绍

这里使用AngularJS的指令进行处理代码及其简洁明了

下面是指令JS代码

app.directive('ccForm',['$parse',function ($parse) {
  return {
    restrict:'A',
    link:function (scope,element,attrs) {
      var first=true;
      var errors=0;
      var checkInterval;
      function showError(input,errorIndex) {
        if(first){
          errors++;
          $parse(element.attr('cc-form')).assign(scope,false);
          refreshScope(scope);
          return;
        }
        input.addClass('hasError');
        input.closest('.form-group').addClass('hasError');
        input.next('.help-block').find('.cc-show').removeClass('cc-show');
        input.next('.help-block').find('[cc-error-'+errorIndex+']').addClass('cc-show');
        input.closest('.form-group').next('.help-block').find('.cc-show').removeClass('cc-show');
        input.closest('.form-group').next('.help-block').find('[cc-error-'+errorIndex+']').addClass('cc-show');
      }
      function hidError(input,errorIndex) {
        errors--;
        if(errors==0){
          $parse(element.attr('cc-form')).assign(scope,true);
          refreshScope(scope);
        }
        input.removeClass('hasError');
        input.closest('.form-group').removeClass('hasError');
        input.next('.help-block').find('[cc-error-'+errorIndex+']').removeClass('cc-show');
        input.closest('.form-group').next('.help-block').find('[cc-error-'+errorIndex+']').removeClass('cc-show');
      }
      function checkInput(input) {
        var that=$(input);
        // $('[cc-email]')[0].attributes[0].name
        var attrs=input.attributes;
        var value=that.val();
        for(var i=0,attr;attr=attrs[i];i++){
          if(attr.name=='cc-email'){
            if(/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/.test(value)){
              hidError(that,attr.value)
            }else{
              showError(that,attr.value);
              break;
            }
          }else if(attr.name=='cc-phone'){
            if(/\d{11}/.test(value)){
              hidError(that,attr.value);
            }else {
              showError(that,attr.value);
              break;
            }
          }else if(attr.name=='cc-max'){
            if(value.length>attr.value){
              showError(that,that.attr(attr.name+'-error'));
              break;
            }else {
              hidError(that,that.attr(attr.name+'-error'));
            }
          }else if(attr.name=='cc-min'){
            if(value.length<attr.value){
              showError(that,that.attr(attr.name+'-error'));
              break;
            }else {
              hidError(that,that.attr(attr.name+'-error'));
            }
          }else if(attr.name=='cc-regex'){
            var patten=new RegExp(attr.value);
            if(patten.test(value)){
              hidError(that,that.attr(attr.name+'-error'));
            }else {
              showError(that,that.attr(attr.name+'-error'));
              break;
            }
          }else if(attr.name=='cc-require'){
            if(!value||value.trim()==''){
              showError(that,attr.value);
              break;
            }else {
              hidError(that,attr.value);
            }
          }
        }
      }
      function checkForm(form) {
        form.find('input,textarea').each(function () {
          checkInput(this);
        });
      }
      element.find('input,textarea').focus(function (e) {
        var that=this;
        first=false;
        checkInterval=setInterval(function () {
          checkInput(that);
        },500);
      });
      element.find('input,textarea').blur(function (e) {
        first=false;
        checkInput(this);
        clearInterval(checkInterval);
      });
      element.find('[cc-submit]').click(function (e) {
        first=false;
        clearInterval(checkInterval);
        checkForm(element);
      });
      //预检测时不显示错误提示
      checkForm(element);
    }
  }
}]);

对应的需要一点点CSS代码，下面是用LESS写的

.help-block {
 * {
  &:not(.cc-show) {
   display: none;
  }
 }
}

对应的CSS就是

.help-block *:not(.cc-show) {
  display: none;
}

用法1

<div>
  <h1>test</h1>
  <form cc-form="form1">
    <div class="from-group">
      <input type="password" ng-model="user.password" cc-max="16" cc-max-error="1" cc-min="6" cc-min-error="2">
      <div class="help-block">
        <p cc-error-1>密码长度不能超过16位</p>
        <p cc-error-2>密码最短为6</p>
      </div>
    </div>
    <div class="form-group">
      <input ng-model="user.phone" cc-regex="\d{11}" cc-regex-error="1">
      <div class="help-block">
        <p cc-error-1>请输入正确的手机号</p>
      </div>
    </div>
    <div class="form-group">
      <input ng-model="user.fax" cc-require="1">
      <div class="help-block">
        <p cc-error-1>请输入传真</p>
      </div>
    </div>
    <div class="form-group">
      <input ng-model="user.email" cc-email="1">
      <div class="help-block">
        <p cc-error-1>请输入正确的邮箱</p>
      </div>
    </div>
    <button type="button" cc-submit>提交</button>
  </form>
</div>

用法2

<form class="form shadow-box" cc-form="form1">
  <h3>登录</h3>
  <div class="form-group">
    <div class="cellphone">
      <input placeholder="手机号" ng-model="user.loginName" name="loginName" cc-regex="\d{11}" cc-regex-error="1" cc-require="2"/>
    </div>
  </div>
  <div class="help-block">
    <p cc-error-1>请输入正确的手机号</p>
    <p cc-error-2>请输入手机号</p>
  </div>
  <div class="form-group">
    <div class="password">
      <input placeholder="密码" type="password" ng-model="user.password" name="password" cc-require="1"/>
    </div>
  </div>
  <div class="help-block">
    <p cc-error-1>请输入密码</p>
  </div>
  <div class="form-group">
    <div class="vcode">
      <input placeholder="验证码" ng-model="user.vcode" name="vcode" cc-require="1">
      <img src="">
    </div>
  </div>
  <div class="help-block">
    <p cc-error-1>请输入验证码</p>
  </div>
  <div class="checkbox">
    <label>
      <input type="checkbox" ng-model="user.rememberPass" ng-true-value="true" ng-false-value="false">自动登录
    </label>
  </div>
  <p class="to-register">没有账号？<a href="#/main/register">立即注册</a></p>
  <button type="button" ng-click="login(1)" cc-submit>登录</button>
</form>

如此简洁明了