JavaScript | RegExp \w Metacharacter
The RegExp \w Metacharacter in JavaScript is used to find the word character i.e. characters from a to z, A to Z, 0 to 9. It is same as [a-zA-Z_0-9].
Syntax:
/\w/
or
new RegExp("\\w")Syntax with modifiers:
/\w/g
or
new RegExp("\\w", "g")Example 1: This example searches the lowercase characters, uppercase characters and underscore.
<!DOCTYPE html><html> <head> <title> JavaScript RegExp \w Metacharacter </title></head> <body style="text-align:center"> <h1 style="color:green"> GeeksforGeeks </h1> <h2>RegExp \w Metacharacter</h2> <p>Input String: GeeksforGeeks@_123_$</p> <button onclick="geek()"> Click it! </button> <p id="app"></p> <script> function geek() { var str1 = "GeeksforGeeks@_123_$"; var regex4 = /\w/g; var match4 = str1.match(regex4); document.getElementById("app").innerHTML = "Found " + match4.length + " matches: " + match4; } </script></body> </html> |
Output:
Before Clicking the button:
After Clicking the button:
Example 2: This example searches the lowercase characters, uppercase characters and underscores and replaces them with hash(#).
<!DOCTYPE html><html> <head> <title> JavaScript RegExp \w Metacharacter </title></head> <body style="text-align:center"> <h1 style="color:green"> GeeksforGeeks </h1> <h2>RegExp \w Metacharacter</h2> <p>Input String: 128@$%</p> <button onclick="geek()"> Click it! </button> <p id="app"></p> <script> function geek() { var str1 = "128@$%"; var replacement = "#"; var regex4 = new RegExp("\\w", "g"); var match4 = str1.replace(regex4, replacement); document.getElementById("app").innerHTML = "Found " + match4.length + " matches: " + match4; } </script></body> </html> |
Output:
Before Clicking the button:
After Clicking the button:
Supported Browsers: The browsers supported by RegExp \w Metacharacter are listed below:
- Google Chrome
- Apple Safari
- Mozilla Firefox
- Opera
- Internet Explorer
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