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  • How to make Registration Form with Validation Using JavaScript | Form Validation.

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How to make Registration Form with Validation Using JavaScript | Form Validation.

CodewithNizami2 years ago1 year ago011 mins
form validation

Custom styles

For custom Bootstrap form validation messages, you’ll need to add the novalidate boolean attribute to your 

. This disables the browser default feedback tooltips, but still provides access to the form validation APIs in JavaScript. Try to submit the form below; our JavaScript will intercept the submit button and relay feedback to you.

When attempting to submit, you’ll see the :invalid and :valid styles applied to your form controls.

Client-side validation is an initial check and an important feature of good user experience;
by catching invalid data on the client-side, the user can fix it straight away. If it gets to
the server and is then rejected, a noticeable delay is caused by a round trip to the server
and then back to the client-side to tell the user to fix their data.

However, client-side validation should not be considered an exhaustive security measure! Your
apps should always perform security checks on any form-submitted data on the server-side as well
as the client-side, because client-side validation is too easy to bypass, so malicious users can
still easily send bad data through to your server. Read Website security for an idea of what
could happen; implementing server-side validation is somewhat beyond the scope of this module,
but you should bear it in mind.

Table of Contents

  • What is form validation?
  • There are three main reasons:
  • Q. What is the use of form in HTML?
  • Q. How does HTML form work?
  • Q. Why do we need to learn HTML Forms?
  • How to Design It.
  • Watch video related this article…

What is form validation?

Go to any popular site with a registration form, and you will notice that they provide feedback when you don’t enter your data in the format they are expecting. You’ll get messages such as:

“This field is required” (You can’t leave this field blank).

“Please enter your phone number in the format xxx-xxxx” (A specific data format is required for it to be considered valid). “Please enter a valid email address” (the data you entered is not in the right format).

“Your password needs to be between 8 and 30 characters long and contain one uppercase letter, one symbol, and a number.” (A very specific data format is required for your data).
This is called form validation. When you enter data, the browser and/or the web server will check to see that the data is in the correct format and within the constraints set by the application. Validation done in the browser is called client-side validation, while validation done on the server is called server-side validation. In this chapter we are focusing on client-side validation.

If the information is correctly formatted, the application allows the data to be submitted to the server and (usually) saved in a database; if the information isn’t correctly formatted, it gives the user an error message explaining what needs to be corrected, and lets them try again.

We want to make filling out web forms as easy as possible. So why do we insist on validating our forms?

There are three main reasons:

We want to get the right data, in the right format. Our applications won’t work properly if our users’ data is stored in the wrong format, is incorrect, or is omitted altogether.
We want to protect our users’ data. Forcing our users to enter secure passwords makes it easier to protect their account information. We want to protect ourselves. There are many ways that malicious users can misuse unprotected forms to damage the application (see Website security).

An HTML form is a document that stores user information on a web server using interactive controls. An HTML form contains various types of information such as username, password, contact number, email id etc. The elements used in HTML forms are check boxes, input boxes, radio buttons, submit buttons, etc. User information is submitted to the web server using these elements. The form tag is used to create HTML forms.

An HTML form is used to collect user input. When you want to collect some data from site visitors, HTML form is required. For example, during user registration, you enter information like name, email address, credit card, etc. If you open regular websites, you will find HTML Forms in many forms in Websites, such as Sign Up Forms, Log in Forms, Payment Details Forms, Survey Forms, Product Review etc.

A form will take input from site visitors and then post it to a CGI, ASP script or PHP script etc back-end application. The file selection box is used to allow the user to select a local file and send it as an attachment to the web server. It is similar to a text box with a button that allows the user to browse for a file. File, path and file name can also be typed. File select boxes are created using the “input” element with a type attribute with the value as “FILE”

Q. What is the use of form in HTML?

A webform, web form or HTML form on a web page allows the user to enter data that is sent to a server for processing. Forms can resemble paper or database forms as web users fill out forms using checkboxes, radio buttons, or text fields.

Q. How does HTML form work?

1.Visitors loads the form page in their web browser. The browser sends a request to the web server.
2. The visitor fills the form and submits it.
3. After filling the form, the data is sent to the web server.
4. The web server processes the request.
5. A response is sent back to the browser.

Q. Why do we need to learn HTML Forms?

HTML FORM is needed when you want to collect certain data from the person who visits your website. For example, when you register for an application like Uber, Netflix, or Facebook, you enter information such as name, email, and password via an HTML form.

How to Design It.

First of all give the form class and make some property for design this form first give the width 600px, height auto, padding 30px, top bottom left and right. Then give the label for form fied title and font size 15px and color black. After this give input tag and make some style for input like field width 100% and height 30px then save it.

 

 

Looks good! Looks good! @ Please choose a username. Please provide a valid city. Please provide a valid state. Please provide a valid zip. You must agree before submitting.

Watch video related this article…

Tagged: form form in html form using html form using javascript form validation form validation using javascript how to make form using html login form design registration form using html css and javascript

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