How does regex work in JavaScript?

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AI Bootstrap Builder · Accepted Answer

Regular expressions (regex) in JavaScript are patterns used to match character combinations in strings. They are implemented using the RegExp object or by using regex literals.


        // Example of using regex to find all occurrences of "cat" in a string
        const text = "The cat sat on the mat with another cat.";
        const regex = /cat/g;
        const matches = text.match(regex);
        console.log(matches); // Output: ["cat", "cat"]

ADDITIONAL COMMENT: - The "g" flag in the regex indicates a global search, meaning it will find all matches in the string. - You can create regex patterns using literals (e.g., /pattern/) or the RegExp constructor (e.g., new RegExp("pattern")). - Regex can be used with methods like "match", "replace", "test", and "exec" for various string operations. ✅ Answered with JavaScript best practices.

How does regex work in JavaScript?

Asked on Aug 29, 2024

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