babel-loader VS lodash

babel-loader

Uncaught TypeError: Object.assign is not a function I'm already using babel-loader to transpile ES6 to ES5, so all my other ES6 code is working. Yet, Object.assign() only works after I also import "babel-core/polyfill" in my codebase. I see that I can also fix this by importing babel-runtime, but I'd like to understand why Object.assign() requires more than what babel-loader performs — shouldn't babel-loader preprocess everything, including Object.assign()?

It looks like this may be an old version of webpack according to [this GitHub issue](https://github.com/babel/babel-loader/issues/798).

And babel/webpack seems to get upset at re-exporting things that don't exist at runtime (types and interfaces): https://github.com/babel/babel-loader/issues/603. So, you need to be careful to re-export your types with a different syntax, which is hard to remember when you're writing a file full of export * from 'foo'.

Apparently, this is usually a problem with Babel 7 and plugins but I've upgraded the plugins and still have this issue: https://github.com/babel/babel-loader/issues/560

There are many ways to integrate TypeScript with an existing Webpack configuration. If you use the babel-loader package to transpile JavaScript files, you can add the @babel/preset-typescript preset to generate JavaScript files and the Fork TS Checker Webpack Plugin package to run the TypeScript type checker so that the build fails if there are type errors.

Lodash.js is like the Swiss Army knife for JavaScript developers. Need to manipulate data structures or dabble in functional programming? Lodash is here to save the day with its arsenal of utilities. It's all about making your code cleaner and your life easier, which is probably why big guns like Google and Airbnb have it in their toolkit.

lodash - utility library enabling things like deep object comparison that aren't easy to do with javascript out of the box. docs

Lodash is a widely used JavaScript utility library that provides a plethora of functions to simplify common programming tasks. From manipulating arrays and objects to handling edge cases and implementing functional programming paradigms, Lodash offers a comprehensive toolkit for JavaScript developers. In this beginner's guide, we'll learn how to get started with Lodash and leverage its functionality to write cleaner, more efficient, and more maintainable code.

5. Lodash

If you want even more sophisticated equality checks like deep comparisons, there's the: lodash.iseQual library that'll do this for you out of the box. At least now you do have a bit of clarity on what's happening under the hood, so there's no harm in using a library.

It's also important to ensure that you're importing libraries correctly, so webpack can perform tree shaking effectively. For example, let's import lodash, as follows:

Lodash is awesome! It’s a JavaScript library that helps you do many things with data. You can use Lodash to manipulate arrays, objects, JavaScript strings, numbers, and more. It’s easy to get Lodash in your project. You can use npm or a CDN to install and import it. Here’s how:

Think of RxJS as Lodash for events.

lodash and You Might Not Need Lodash

A lot of Lodash functions are implemented as combinations of other Lodash functions, so importing a single function actually imports half of Lodash under the hood:

https://github.com/lodash/lodash/blob/main/src/.internal/bas...