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How Can I Match Whole Words in JavaScript Using Regular Expressions?

Barbara Streisand
Release: 2024-12-07 18:00:17
Original
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How Can I Match Whole Words in JavaScript Using Regular Expressions?

Matching Whole Words in JavaScript

The task at hand is to locate every instance of a specified whole word within a text field. Consider searching for the term "me." The search should identify all occurrences of "me" in the text, excluding variations like "memmm."

After experimenting with b switches without success, let's delve deeper into the issue. The following JavaScript search text is used:

var lookup = '\n\n\n\n\n\n2    PC Games        \n\n\n\n';
lookup  = lookup.trim() ;
alert(lookup );

var tttt = 'tttt';
alert((/\b(lookup)\b/g).test(2));
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Dynamic regular expressions are required for effective matching. Here's the revised code:

new RegExp("\b" + lookup + "\b").test(textbox.value)
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In the provided example:

alert((/\b(2)\b/g).test(lookup));
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the logic is reversed.

Refer to the provided resources for further guidance:

  • Regexpal: https://regexpal.com/
  • Regex Object: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp

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