In JavaScript, What Is The Method To Replace All Instances Of A String?

To replace all occurrences of a string in JavaScript, you can use the replace() method with a regular expression and the ‘g’ (global) flag. Here’s an example:

let str = "Hello World! Hello World! Hello World!"; // Input string
let search = "Hello"; // String to search for
let replaceWith = "Hi"; // Replacement string

// Use the replace() method with a regular expression and 'g' flag
let result = str.replace(new RegExp(search, 'g'), replaceWith);

console.log(result); // Output: "Hi World! Hi World! Hi World!"

In the above example, we use the replace() method with the new RegExp() constructor to create a regular expression with the search string and the ‘g’ flag. The ‘g’ flag helps to replace all occurrences of the search string. The replace() method then replaces all occurrences of the search string with the replacement string and returns the modified string.

Note: The replace() method doesn’t modify the original string but instead returns a new string with replacements applied.

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