JavaScript Regular Expressions | validation regex javascript
Aregularexpressionisasequenceofcharactersthatformsasearchpattern.Thesearchpatterncanbeusedfortextsearchandtextreplaceoperations.WhatIsaRegularExpression?Aregularexpressionisasequenceofcharactersthatformsasearchpattern.Whenyousearchfordatainatext,youcanusethissearchpatterntodescribewhatyouaresearchingfor.Aregularexpressioncanbeasinglecharacter,oramorecomplicatedpattern.Regularexpressionscanbeusedtoperformalltypesoftextsearchandtextreplaceoperations.SyntaxExampleexplained:/w3schools/i isaregul...
A regular expression is a sequence of characters that forms a search pattern.
The search pattern can be used for text search and text replace operations.
What Is a Regular Expression?A regular expression is a sequence of characters that forms a search pattern.
When you search for data in a text, you can use this search pattern to describe what you are searching for.
A regular expression can be a single character, or a more complicated pattern.
Regular expressions can be used to perform all types of text search and text replace operations.
SyntaxExample explained:
/w3schools/i is a regular expression.
w3schools is a pattern (to be used in a search).
i is a modifier (modifies the search to be case-insensitive).
Using String MethodsIn JavaScript, regular expressions are often used with the two string methods: search() and replace().
The search() method uses...