replace substring in javascript

In JavaScript, you can replace a substring within a string using the replace() function.

The replace() function takes two arguments. The first argument is the substring you want to replace, and the second argument is the new substring you want to replace it with.

Here's an example:

index.tsx
let originalString = "The quick brown fox jumps over the lazy dog.";
let newString = originalString.replace("fox", "cat");
console.log(newString); // "The quick brown cat jumps over the lazy dog."
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In the above code, we take the original string "The quick brown fox jumps over the lazy dog.", and replace the substring "fox" with "cat". The replace() function returns a new string, which we assign to newString. When we log newString to the console, we get the updated string "The quick brown cat jumps over the lazy dog."