JavaScript regular expressions: [^xyz]
find pattern
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A JavaScript
regular expression takes the form: /pattern/modifiers
Regular expressions can also include brackets to accept (or
reject) a range of characters. An expression containing [^xyz] means find any character not within the bracket.
EXAMPLE:
HTML USED IN THIS EXAMPLE:
<!DOCTYPE html>
<html> <!-- Copyright (c) Nematrian Limited 2018 -->
<head>
<style>
table,th,tr,td {border: 1px solid black; border-collapse: collapse;}
</style>
</head>
<body>
<table>
<tr>
<th>Example</th>
<th>Resulting value of <code>x</code></th>
</tr>
<tr>
<td><code id="Example"></code></td>
<td><code id="Result"></code></td>
</tr>
</table>
<script>
var str = "Hello world";
document.getElementById("Example").innerHTML =
'var str = "Hello world";<br>' +
'var x = str.replace(/[^a-f]/g,"*");';
document.getElementById("Result").innerHTML
= str.replace(/[^a-f]/g,"*");
</script>
</body>
</html>
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