Post Link : Regular expression validation in JavaScript
A Regular expressions is a powerful tool in any language. In this tutorial we will be discussing how to use regular expression in JavaScript. Regular expression is the most important part in form validations and it is widely used for search, replace and web crawling systems. A regular expression is also known as RegEx.
or succinctly,
Regular expressions use to detect patterns in strings of text. Regular expressions provides a quick and easy way of matching a string to a pattern. Validation of mobile no, username, email id, website url are possible through Regular expressions.
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