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With JavaScript Regular Expression find a non-whitespace character.
To find a non-whitespace character in JavaScript regular expressions, use the \S metacharacter. This matches any character that is not a space, tab, newline, or other whitespace character.
Syntax
\S // Matches any non-whitespace character \S+ // Matches one or more non-whitespace characters \S* // Matches zero or more non-whitespace characters
Example: Finding Non-Whitespace Characters
<html>
<head>
<title>JavaScript Regular Expression</title>
</head>
<body>
<script>
var myStr = "100% Responsive!";
var reg = /\S/g;
var match = myStr.match(reg);
document.write("Original string: " + myStr + "<br>");
document.write("Non-whitespace characters: " + match.join(""));
</script>
</body>
</html>
Output
Original string: 100% Responsive! Non-whitespace characters: 100%Responsive!
Extracting Words Using \S+
To find complete words (sequences of non-whitespace characters), use \S+:
<html>
<head>
<title>Extract Words</title>
</head>
<body>
<script>
var text = "Hello World 123!";
var wordPattern = /\S+/g;
var words = text.match(wordPattern);
document.write("Text: " + text + "<br>");
document.write("Words found: " + words.join(", "));
</script>
</body>
</html>
Output
Text: Hello World 123! Words found: Hello, World, 123!
Comparison with Whitespace Pattern
| Pattern | Matches | Example |
|---|---|---|
\S |
Any non-whitespace character | a, 1, %, @ |
\s |
Any whitespace character | space, tab, newline |
Conclusion
The \S metacharacter is essential for matching non-whitespace characters in JavaScript regular expressions. Use \S+ to extract complete words or tokens from strings.
Updated on: 2026-03-15T23:18:59+05:30
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