how to use the isregexp function from the underscore library in javascript

To use the isRegExp function from the Underscore library in JavaScript, you first need to load the Underscore library in your project.

Assuming you have already done that, to use the isRegExp function you simply pass a value to the function and it will return a boolean indicating whether it is a regular expression or not.

Here's an example:

index.tsx
const _ = require('underscore');

console.log(_.isRegExp(/hello/)); // Output: true

console.log(_.isRegExp('hello')); // Output: false
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In the above code block, we first load the Underscore library using require(). We then pass a regular expression /hello/ and a string 'hello' to the isRegExp function. The first log statement will output true since /hello/ is a regular expression, while the second log statement will output false since 'hello' is not a regular expression.