JavaScript - Regex
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NOTE: This page is a daughter page of: JavaScript
Regex in JavaScript isn't too hard, but this can help. This example uses the line.match
function to find matches in each line.
The HTML:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JavaScript Regex Tester</title>
<script>
function PerformRegex() {
var str = document.getElementById("my-text-area-in").value;
var lines = str.split('\n');
var outLines = '';
for (var i = 0; i < lines.length; i++) {
var line = lines[i];
var found = line.match(/^\d{6,10}/g); // Regex pattern to match.
console.log(line + ' -> ' + found)
if (found) {
outLines += found + '\n';
}
}
document.getElementById("my-text-area-out").value = outLines;
}
</script>
</head>
<body>
<textarea id="my-text-area-in" rows="4" cols="50">123456789 # someting
123456,something else
123456
</textarea><br/>
<input type=button value="RunRegex" onclick="PerformRegex();">
Regex using <code>line.match(/^\d{6,10}/g)</code>
<br/>
<textarea id="my-text-area-out" rows="4" cols="50"></textarea><br/>
</body>
</html>
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See Also
- JavaScript - other JavaScript examples.