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JavaScript leftContext Property
Complete RegExp Object Reference
Definition and Usage
The leftContext property is the substring in front of the characters most recently matched.
This property contains everything from the string from before the match.
Syntax
RegExp.leftContext
Example
In the following example we will see the text from the string in front of the last match:
<script type="text/javascript">
var str = "The rain in Spain stays mainly in the plain";
var patt1 = new RegExp("ain");
patt1.test(str);
document.write("Text before match: " + RegExp.leftContext);
</script>
var str = "The rain in Spain stays mainly in the plain";
var patt1 = new RegExp("ain");
patt1.test(str);
document.write("Text before match: " + RegExp.leftContext);
</script>
Try it yourself »
Complete RegExp Object Reference
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Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.
Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.