Use match() method to Validate decimal numbers in JavaScript. Here is example code to validate decimal numbers.
<html>
<body>
<script>
var str = "17";
var re = /^[-+]?[0-9]+\.[0-9]+$/;
var found = str.match( re );
alert("decimal" );
</script>
</body>
</html>Output:
Regex in JavaScript for validating decimal numbers
Use the following expression as below example code.
<html>
<body>
<script>
var regexp = /^\d+\.\d{0,2}$/;
// returns true
var res = regexp.test('10.5')
alert(res);
</script>
</body>
</html>Output:
Do comment if you have any questions and suggestions on this topic.
Note: The All JS Examples codes are tested on the Safari browser (Version 12.0.2) and Chrome.
OS: macOS 10.14 Mojave
Code: HTML 5 Version