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