Use Capture Groups to Search and Replace # 42

Searching is useful. However, you can make searching even more powerful when it also changes (or replaces) the text you match.

You can search and replace text in a string using .replace() on a string. The inputs for .replace() is first the regex pattern you want to search for. The second parameter is the string to replace the match or a function to do something.

let wrongText = "The sky is silver.";
let silverRegex = /silver/;
wrongText.replace(silverRegex, "blue");

The replace call would return the string The sky is blue.

You can also access capture groups in the replacement string with dollar signs ($).

"Code Camp".replace(/(\w+)\s(\w+)/, '$2 $1');

The replace call would return the string Camp Code.