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With JavaScript RegExp search a carriage return character.
To find carriage return characters with JavaScript Regular Expression, use the \r metacharacter. This pattern matches the carriage return character (ASCII code 13) in strings.
Syntax
/\r/
Example: Finding Carriage Return Position
The following example shows how to search for a carriage return character and return its position in the string:
<html>
<head>
<title>JavaScript Regular Expression</title>
</head>
<body>
<script>
var myStr = "100% \r Responsive!";
var reg = /\r/;
var match = myStr.search(reg);
document.write("Position of carriage return: " + match);
</script>
</body>
</html>
Position of carriage return: 4
Testing for Carriage Return
You can also use the test() method to check if a carriage return exists:
<html>
<head>
<title>Testing Carriage Return</title>
</head>
<body>
<script>
var str1 = "Hello\rWorld";
var str2 = "Hello World";
var regex = /\r/;
document.write("String 1 has carriage return: " + regex.test(str1) + "<br>");
document.write("String 2 has carriage return: " + regex.test(str2));
</script>
</body>
</html>
String 1 has carriage return: true String 2 has carriage return: false
Common Use Cases
Carriage return detection is useful for:
- Processing text files from Windows systems
- Cleaning up user input from text areas
- Converting line endings between different systems
Conclusion
Use /\r/ regex pattern to detect carriage return characters in JavaScript strings. The search() method returns the position, while test() returns a boolean result.
Updated on: 2026-03-15T23:18:59+05:30
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