Reasons to Go for Underscore.js
This library, which is little under six kilobytes in size, basically gives us a whole variety of helpful JavaScript methods to make our lives simpler. There are literally hundreds of functions available that enable both common functional aids like map and filter, as well as more specialised ones like JavaScript templating, function binding, deep equality checking, and constructing rapid indexes, among others. Functions that can be used to manipulate arrays, functions that can be used to manipulate objects, functions that can be used to manipulate both arrays and objects, and functions that can be used to manipulate other functions are the four primary kinds of underscore functions.
We need to talk about the ECMAScript 5 (ES5) specification and what it means for JavaScript as a programming language to understand why Underscore is so popular. ECMAScript is an open language specification, and JavaScript is a specific implementation of it. ECMAScript 5 is the most recent version of this standard, which was completed at the end of 2009. (or ECMAScript 5.1 to be very specific). This version incorporated additional functional capabilities, enhanced the meta-programming narrative, and provided functionality for the built-in JavaScript objects, Array and Object. It was quickly adopted by all major browsers, including Internet Explorer starting with version 9.
There were still a significant number of people using browsers like Internet Explorer 6, 7, and 8, who were unlikely to migrate to Internet Explorer 9 as rapidly as users of browsers like Mozilla Firefox and Google Chrome, which had shorter release and upgrade cycles. Because Underscore supported some of the new features offered by ECMAScript 5, it was a handy library for web applications targeting older browsers like Internet Explorer 8, as well as for developers who wished to create ES5 code without worrying about browser compatibility. Although ES5 support is significant, it is a minor feature in comparison to the rest of Underscore's capabilities. For more examples and instances, you can look up our Underscore.js assignment help.