10 examples of 'registration form validation using javascript in jsp' in JavaScript

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validateForm() {
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  return this.state.username.length > 0 && this.state.password.length > 0 && this.state.confirmPassword.length > 0 && this.state.password === this.state.confirmPassword;
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}

224
function reg_validForm(a) {
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	$(".has-error", a).removeClass("has-error");
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	var d = 0,
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		c = [];
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	$(a).find("input.required,textarea.required,select.required,div.required").each(function() {
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		var b = $(this).prop("tagName");
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		"INPUT" != b && "TEXTAREA" != b || "password" == $(a).prop("type") || "radio" == $(a).prop("type") || "checkbox" == $(a).prop("type") || $(this).val(trim(strip_tags($(this).val())));
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		if (!validCheck(this)) return d++, $(".tooltip-current", a).removeClass("tooltip-current"), $(this).addClass("tooltip-current").attr("data-current-mess", $(this).attr("data-mess")), validErrorShow(this), !1
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	});
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	d || (c.type = $(a).prop("method"), c.url = $(a).prop("action"), c.data = $(a).serialize(), formErrorHidden(a), $(a).find("input,button,select,textarea").prop("disabled", !0), $.ajax({
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		type: c.type,
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		cache: !1,
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		url: c.url,
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		data: c.data,
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		dataType: "json",
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		success: function(b) {
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			var c = $("[onclick*='change_captcha']", a);
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			c && c.click();
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			"error" == b.status ? ($("input,button,select,textarea", a).prop("disabled", !1), $(".tooltip-current", a).removeClass("tooltip-current"), "" != b.input ? $(a).find("[name=\"" + b.input + "\"]").each(function() {
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				$(this).addClass("tooltip-current").attr("data-current-mess", b.mess);
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				validErrorShow(this)
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			}) : ($(".nv-info", a).html(b.mess).addClass("error").show(), $("html, body").animate({
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				scrollTop: $(".nv-info", a).offset().top
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			}, 800))) : ($(".nv-info", a).html(b.mess + '<span></span>').removeClass("error").addClass("success").show(), ("ok" == b.input ? setTimeout(function() {
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				$(".nv-info", a).fadeOut();
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				$("input,button,select,textarea", a).prop("disabled", !1);
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				$("[onclick*=validReset]", a).click()
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			}, 6E3) : $("html, body").animate({
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				scrollTop: $(".nv-info", a).offset().top
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			}, 800, function() {
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				$(".form-detail", a).hide();
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				setTimeout(function() {
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					window.location.href = "" != b.input ? b.input : window.location.href
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				}, 6E3)
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			})))
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		}
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	}));
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	return !1
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}

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onSubmit() {
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  this.af.auth.createUserWithEmailAndPassword(this.registration.value.email, this.registration.value.password)
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    .then((success: any) => {
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      this.db.object("/users/" + success.uid).update({
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        name: this.registration.value.name,
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        email: this.registration.value.email,
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        mobileNo: this.registration.value.mobileNo,
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        role: "User"
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      });
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      localStorage.setItem("uid", success.uid);
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      this.navCtrl.setRoot("HomePage");
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    }).catch(error => {
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      console.log("Firebase failure: " + JSON.stringify(error));
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      this.showAlert(error.message);
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    });
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}

113
function register()
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{
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	var	reg_username=$("div#register #username").val();
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	var	reg_email=$("div#register #email").val();
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	var	reg_password=$("div#register #password").val();
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	var	reg_repassword=$("div#register #repassword").val();
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	if(reg_username=="" || reg_email=="" || reg_password=="" || reg_repassword=="")
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	{
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		$("div#register div#warning").html("All fields are required");
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		return;
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	}
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126
	if(reg_password!=reg_repassword)
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	{
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		$("div#register div#warning").html("Passwords are not the same");
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		return;
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	}
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	$.get("/php/brainspell.php",{"action":"register","username":reg_username,"email":reg_email,"password":reg_password},function(data){
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		if(data=="Yes")
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		{
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			username=reg_username;
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			loggedin=1;
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			$("div.login").remove();
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			console.log("[register] calling update_login");
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			update_login();
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		}
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		else
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		if(data=="Exists")
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		{
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			$("div#register div#warning").html("That username is already in use");
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		}
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		else
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		{
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			$("div#register div#warning").html("Sorry, your registration failed. Please try again later");
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		}
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	});
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}

15
register(form) {
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  this.submitted = true;
17
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  if (form.$valid) {
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    this.Auth.createUser({
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      name: this.user.name,
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      email: this.user.email,
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      password: this.user.password
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    })
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    .then(() => {
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      // Account created, redirect to home
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      this.$state.go('main');
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    })
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    .catch(err => {
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      err = err.data;
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      this.errors = {};
31
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      // Update validity of form fields that match the mongoose errors
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      angular.forEach(err.errors, (error, field) => {
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        form[field].$setValidity('mongoose', false);
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        this.errors[field] = error.message;
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      });
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    });
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  }
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}

5
get confirmPassword () { return $('input[name="confirmPassword"]'); }

111
private hasPasswordConfirmValidationErrors(): boolean {
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    const password = this.registrationFormElement.dataForm.getPropertyByName("password");
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    const passwordConfirm = this.registrationFormElement.dataForm.getPropertyByName("passwordConfirm");
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    if (password.valueCandidate !== passwordConfirm.valueCandidate) {
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        passwordConfirm.errorMessage = "Password does not match the confirm password.";
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        this.registrationFormElement.dataForm.notifyValidated("passwordConfirm", false);
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        return true;
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    }
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    return false;
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}

17
function validateForm()
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{
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	var message = "";
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	var returnValue = true;
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	var fm = document.getElementById("fm");
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	if(fm.firstName.value == "")
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	{
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		message += "- The field First Name is Mandatory \n";
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		returnValue = false;
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	}
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	if(fm.lastName.value == "")
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	{
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		message += "- The field Last Name is Mandatory \n";
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		returnValue = false;
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	}
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	if(fm.email.value == "")
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	{
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		message += "- The field Email is Mandatory \n";
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		returnValue = false;
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	}
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	if(!returnValue)
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	{
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		message = "Please correct the following errors:\n\n" + message;
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		alert(message);
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	}
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	return returnValue;
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}

17
function onRegisterBtn()
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{
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  var email = $("#reg_email").val();
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  var password = $("#reg_password").val();
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console.log(MC);
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  MC.User.register(email, password)
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    .done(function()
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    {
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      console.log('Registration is success!' + MC.User._oid);
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      $.mobile.changePage('#ListPage');
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    })
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    .fail(function(err)
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    {
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        console.log('FAILED');
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      alert('Registration failed!');
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      console.error(JSON.stringify(err));
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    });
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}

32
function validateForm() {
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	var  user = document.forms["myForm"]["user"].value;
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	if(user.trim() == "") {
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		document.getElementById("userError").innerHTML = "Remplir le champ svp !";
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		return false;
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	}
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	return true;
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}