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

To use uniqueId function from Underscore library in JavaScript, first, you need to download the Underscore library from its website or install it through a package manager like NPM.

Once you have included the Underscore library in your JavaScript file, you can use it to generate unique IDs by calling the uniqueId() function.

Here's an example:

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

// generate unique IDs
const id1 = _.uniqueId();
const id2 = _.uniqueId();
const id3 = _.uniqueId();

console.log(id1); // logs: '1'
console.log(id2); // logs: '2'
console.log(id3); // logs: '3'
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The uniqueId function generates a unique ID based on the number of times it has been called in the current session of the program. It adds a number to the string "id_", starting with 0 and incrementing by 1 with each call to the function.

You can also pass a prefix string as an argument to the uniqueId function to customize the prefix of the generated ID. For example:

index.tsx
const myPrefix = 'my-id-prefix-';
const customId1 = _.uniqueId(myPrefix);
const customId2 = _.uniqueId(myPrefix);

console.log(customId1); // logs: 'my-id-prefix-4'
console.log(customId2); // logs: 'my-id-prefix-5'
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In this example, the generated IDs start with the prefix string "my-id-prefix-" followed by a number that increments with each call to the function.