Minimize transpiled code helpers using babel and webpack

In my current project, I am utilizing babel for transpiling to ES5 and webpack for bundling the code. Babel adds specific functions at the beginning of each file to support various features, such as rest parameters here and import statements here.

For instance, almost every file contains this declaration:

var _interopRequire = function (obj) { return obj && obj.__esModule ? obj["default"] : obj; };

Additionally, some files include the following:

var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };

In a smaller personal project, this setup is manageable. However, in my larger work project, I believe I can optimize by consolidating all these polyfills into one centralized location that babel/webpack can reference. Instead of including _interopRequire in every file with imports, I aim to have it in a single place for reference.

Is there a way to achieve this optimization?

Answer №1

I encountered a similar inquiry before, and the solution can be found in the official documentation:

https://babeljs.io/docs/en/babel-runtime

Simply include 'babel?optional=runtime' in your webpack configuration to achieve this.

Answer №2

When it comes to dealing with a library or small project, I have some uncertainties on whether including external helpers would truly add value. In my own experience, I discovered that after compressing the files, the size actually decreases when excluding the helper functions.

I've noticed that Babel includes helper functions at the beginning of the code if necessary, preventing them from being repeatedly inlined throughout the file. While gzip helps mitigate this issue, there are still potential concerns, especially when dealing with multiple files and browser compatibility. Although gzip helps, it's not the perfect solution.

(emphasis added)

Thus, I have decided to stick with my current approach and am content with it. (In short, no need to stress over it).

Answer №3

Utilize Babel Runtime,

Due to the length of these helpers and their addition to every file, consider consolidating them into a single "runtime" that is required.

Begin by installing babel-plugin-transform-runtime and babel-runtime:

$ npm install --save-dev babel-plugin-transform-runtime
$ npm install --save babel-runtime

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Asynchronous update of array elements - lack of firing watch events

I have recently developed a component that showcases previews of blog articles. This particular component includes pagination functionality, where selecting a new page triggers the refreshment of the article previews array. The list of articles is obtained ...

javascript selecting window location strings

Hey there, http://localhost/estamo/asset.php?aname=VklQIFBsYXph&di=Ng== I have this URL and I want to retrieve it using Javascript: var locat = window.location.href; $.get("enviaramigo.php?email="+$("#email").val()+"&url="+locat, function(h ...

The template in Typescript is constrained

Upon creating the HashMap interface: export interface HashMap<K, V> { [name: K]: V; } I envisioned utilizing it in this manner: const map: HashMap<String, String>; Unfortunately, I encountered an error indicating that name must only be ...

What are the distinctions between executing a c++ function and a JavaScript function?

After attempting to execute the c++ program provided below, a compilation error occurred. However, when trying to execute the second javascript code snippet below, no errors were detected. Why is this? ////c++//// #include<iostream> using namespace ...

What is the method for storing elements in localStorage within a ReactJs application?

Currently, I am working on learning react-redux and coding a new project. My goal is to implement a feature where clicking the Add Favorites button will push all column data to local storage. Despite reading numerous articles, none of them have provided ...

Transfer the textbox value from page-1 to page-2 seamlessly with the help of AngularJS UI-routing

I'm attempting to transfer the textbox value from Page-1 to Page-2 using the code below, but I am encountering difficulties. Page-1.html <div > <div style="height: 400px"> <h2>Partial view-1</h2> <p> ...

Implementing pagination and filtering in a single MERN controller

Is it possible to implement pagination and filtering in the same controller? Filter service:- const filterPosts = async (filterData, token) => { const config = { headers: { Authorization: `Bearer ${token}`, }, data: { ...

Steps for implementing a Toggle Navigation Bar in CSS

I'm looking to implement a show/hide navigation menu similar to the one showcased in this inspiration source: Code Snippet (HTML) <div id="menus"> <nav id="nav"> <ul> <li><a href="#">HOME</a></li> <li& ...

Unknown identifier in the onClick function

I want to create a JavaScript function that can show or hide a paragraph when clicking on an arrow. The challenge I'm facing is that I have a list of titles generated in a loop on the server, and each title is accompanied by an arrow. Initially, the c ...

Filter the ng-options by the value in a separate dropdown menu

I am having trouble with this code, even though it seems straightforward. My goal is to filter the 'model' dropdown based on the selected 'make'. Make: <select ng-model="makeng" ng-options="option.display for option in ...

I'm puzzled as to why my JavaScript code only functions correctly when I place it after the HTML, despite having a window.onload event handler in place

Just beginning my journey in a CS class and seeking guidance for my lack of basic knowledge. I've noticed that this JS code only works if placed after the HTML, not within the head tag. Shouldn't window.onload handle that? Can someone clarify wha ...

My regular simple form is experiencing issues with AngularJS and jQuery functionality

I am currently expanding my knowledge in AngularJS and have created a simple form. However, as a PHP developer, I decided to utilize PHP as the server-side scripting language. I am encountering difficulties in submitting the data to the server, despite try ...

Cast the variable to access nested data

I'm currently working with data retrieved from an API call in the form of nested objects. My goal is to extract and organize this information for display in a table. In my code, I am using a loop with for (const [key, value] of Object.entries(result)) ...

An error was encountered while attempting to utilize Google's Core Reporting API: Uncaught SyntaxError: Unexpected token <

I've been experimenting with Google's Core Reporting API and successfully implemented their provided demo. Now, I'm trying to integrate the code into my own project. My main tech stack includes AngularJS and PHP. I aim to keep it simple by ...

ReactJS & MobX: Unusual TypeError Occurs - Functionality Issue?

This code snippet defines the SidenavStore.js, which determines if the Sidenav should be visible or not by default: const SidenavStore = types .model('SidenavStore', { isSidenavVisible: types.optional(types.boolean, true), }) .actions( ...

Arrange the div elements in a single horizontal line

Is there a way to align the company logo div next to the name, address, email, and phone number containers? I've attempted using display: inline and float: right, but the logo isn't moving up as desired. Here's the code snippet: http://jsfi ...

At what point is the digest cycle initiated in AngularJS?

All: I have a question regarding how AngularJS data digest tracks changes in scope data, such as the following example: <button ng-click="changename()">{{name}}</button> The data change function is as follows: $scope.name = "Ch ...

Generate responsive elements using Bootstrap dynamically

I'm having success dynamically generating bootstrap elements in my project, except for creating a drop-down menu. ColdFusion is the language I am using to implement these div elements: <div class="panel panel-primary"><div class="panel-head ...

JavaScript code for validating two passwords is malfunctioning

I'm currently working on a registration form for my website and I'm trying to implement a JS script that compares two password inputs (password and repeat password) and displays a message saying "passwords are not the same." Below is the code I h ...

Learn the process of dynamically setting the image src from a local json file in Vue.js3

I am facing a challenge with my App.vue file that has a V-for loop to create a Card Component. The Card Component receives data through a Prop and everything works perfectly, except for the images. Here is the code in my App.vue file: <DevJobCard :Job= ...