The pattern attribute specifies a regular expression that the <input> element's value is checked against on form submission. Note: The pattern attribute works with the following input types: text, date, search, url, tel, email, and password. Tip: Use the global title attribute to describe the pattern to help the user.

Apr 21, 2021 · In this tutorial we’ll explore HTML’s pattern attribute, using it to help us customize the way we validate our forms. Form Validation Video Check out the video tutorial below, subscribe to Tuts+...

Dec 16, 2019 · Recently I tried alot but I still unable to figure how should I able to validation for my text field. I hope I can get some help from here, my questions is I want to validate input text field only accept A-Z a-z 0-9 and space within word. And at least one char or number. For example, "abc def" , "abc092", "abcdef" Only in HTML input tag element .

Apr 10, 2025 · You can use the pattern attribute to specify a regular expression that the inputted value must match in order to be considered valid (see Validating against a regular expression for a crash course on using regular expressions to validate inputs). The example below restricts the value to 4-8 characters and requires that it contain only lower ...

The pattern attribute of the <input> element allows you to add basic data validation without resorting to JavaScript. It works by matching the input value against a regular expression. A regular expression is a formalized string of characters that define a pattern.

Example of HTML pattern attribute. Below examples will illustrate the HTML pattern attribute, where and how we should use this attribute! Pattern attribute for accepting only characters. In this example, where we are going to apply the pattern attribute for the character validation.

Nov 19, 2024 · Let's look at a simple example of how to use the pattern attribute in an HTML form: In this example, the pattern attribute is used to enforce a specific pattern for the phone number input, requiring users to enter it in the format XXX-XXX-XXXX. The pattern attribute can also be manipulated dynamically with JavaScript.

Mar 10, 2024 · Discover how to improve HTML form validation with the pattern attribute. Learn to customize input patterns for greater accuracy.

Sep 24, 2019 · In short, I want the following 2 requirements to be met when user enters the url in the input box. It should start from http or https. It should have at-least one period after sub-domain. Problem Statement: I am wondering what changes I should make in the pattern above at Line A so that it meets my requirements.

In HTML, the pattern attribute on an <input> tag specifies a regular expression which validates the input data before form submission.