Training Babel - Modern JS Transpiler for All Browsers

$3,465

  • 3 days
  • Onsite
  • 10 people max.
Ref: XUC740
10 people max.
$3,465
In-company rate: from $6,290 for the whole team
On-site and certification exam on quote
3 days
Onsite

Don't let this gap widen

Why this program matters

  • Without Babel mastery, 65% of modern JavaScript projects fail on legacy browsers, wasting up to 2 weeks of debug per release.

  • Companies lose an average of 25% web performance and 15% conversion due to unmanaged incompatibilities.

  • In 2024, 82% of recruiters reject resumes without transpilation skills, blocking promotions and career shifts.

  • Every quarter without Babel widens a fatal competitive gap against agile teams that deploy 40% faster.

Célian Lebacle, Learni trainer · Web & mobile expert
Célian Lebacle

Learni trainer · Web & mobile expert

73%productivity gap
×3cost of inaction
Flag of the United StatesBuilt for US teams
Payment by wire transferEnhanced confidentialityPerfect for companies with 50 to 500 employeesScheduling to fit any time zone

Trusted by — schools, companies and industrial groups

41,134 programs · 25 countries

  • Aptar
  • ArcelorMittal
  • Equans
  • EDF
  • Ubisoft
  • Microsoft
  • Atos

Every program built with a dedicated engineer

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Companies: Aptar, ArcelorMittal, Equans, EDF, Ubisoft, Microsoft and Atos.

Babel training objectives

  • Master the basics of Babel for transpiling professional JavaScript code
  • Develop skills in Babel configuration for certified enterprise environments
  • Implement Babel presets and plugins in real projects
  • Design an optimized transpilation workflow for browser compatibility
  • Optimize bundling with Babel integrated into tools like Webpack
  • Deploy modern JavaScript applications compatible with multiple environments

Program

Babel curriculum: 3 modules over 3 days

Module 1 : Babel Fundamentals: Installation and First Transpils (CLI, Node, ES6+ Presets)

Quick installation of Babel via npm in a professional Node.js environment, creation of a first project with babel.config.json configuration, transpilation of ES6 code to ES5 to test immediate compatibility on older browsers, practical exercises on modern syntaxes like arrow functions and classes, generation of optimized output files, analysis of transformations via Babel REPL and documentation of deliverables for team integration.

Module 2 : Babel Configuration: Presets, Plugins and Browser Target (browserslist, Polyfills)

In-depth exploration of @babel/preset-env for automatic multi-browser compatibility, customization of .browserslistrc with caniuse.com data, addition of specific plugins like @babel/plugin-transform-arrow-functions, practical tests on complex source code with async/await, resolution of common errors in interactive debugging, production of transpiled bundles ready for deployment, sharing of reusable configurations in the company to accelerate collective developments.

Module 3 : Babel Integration: Advanced Projects and Optimization (Webpack, Business Cases, Deployment)

Integration of Babel into a Webpack workflow for complete bundling of modern applications, exercises on ongoing projects with ES6 modules and decorators, optimization of builds for size reduction via post-transpilation minification, simulation of deployments on test servers, peer code review for certified best practices, finalization of a personalized action plan with compatibility monitoring tools, delivery of ready-to-use materials for immediate enterprise skills.

How Babel skills are assessed

  • Multiple-choice quiz to validate acquired knowledge at the end of the training
  • Continuous evaluation through practical Babel exercises
  • Presentation of the ongoing transpilation project

How the Babel course is taught

  • Courses led by an active expert Babel trainer
  • Practical exercises on real JavaScript business cases
  • Progressive ongoing project over 3 days
  • Complete course materials and Babel configurations provided

Babel training: access and practical arrangements

The Training Babel - Modern JS Transpiler for All Browsers program is delivered onsite or remote (blended-learning, virtual classroom, remote presence). At Learni, an industry-certified training organization, every program is built to maximize skills acquisition regardless of the chosen format.

The trainer alternates between demonstrative, interrogative and active methods (through hands-on labs and/or scenarios). This pedagogical approach guarantees concrete learning that's immediately applicable at work.

Equipment required

For the smooth delivery of the Training Babel - Modern JS Transpiler for All Browsers program, the following equipment is required:

  • Mac or PC computers, high-speed fiber internet, whiteboard or flipchart, projector or interactive touch screen (for remote sessions)
  • Training environments installed on workstations or accessible online
  • Course materials, hands-on exercises and complementary resources
  • Post-training access to materials and educational resources

For intra-company training on a site outside Learni, the client commits to providing all required teaching materials (computers, internet, etc.) for the smooth delivery of the program in line with the prerequisites in the communicated program.

* contact us for remote delivery feasibility** ratio varies depending on the program

Skills assessment methods

Assessment of skills acquired during the Training Babel - Modern JS Transpiler for All Browsers program is performed through:

  • During training: case studies, hands-on labs and professional scenarios
  • End of training: self-assessment questionnaire and skills evaluation by the trainer
  • After training: completion certificate detailing acquired skills

Program accessibility

Learni is committed to making its programs accessible. All our programs are accessible to people with disabilities. Our teams are available to adapt the pedagogical methods to your specific needs. Please contact us for any adjustment request.

Enrollment terms and lead times

Registration is possible up to 48 business hours before the start of training. All our programs are built for corporate L&D budgets and delivered onsite or remotely.

The Learni story

Founded by engineers and learning experts, Learni's mission is to make high-impact tech training accessible to teams everywhere. We work remotely with organizations across the US and Canada, in your time zone, to help teams upskill fast.

Our method

How Learni guarantees the quality of your Babel training

Before, during, after: we frame the brief, introduce the trainer, tailor the content and measure impact. You stay in control from kickoff to wrap-up.

Step 1

Rigorous trainer selection

Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.

  • Triple validation: technical, pedagogical, sectoral.
  • Minimum rating 4.8/5 over the last 12 sessions.
Step 2

You meet the trainer beforehand

30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.

  • Live briefing on goals and team context.
  • Veto right — we swap the trainer for free if needed.
Step 3

Content tailored to your context

No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.

  • Hands-on cases drawn from your stack and projects.
  • Program co-written then validated by your team.
Step 4

Continuous quality follow-up

Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.

  • NPS, knowledge quizzes and skills self-assessment.
  • Satisfaction guarantee: fully satisfied or free rework.

A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.

A child walking to school with a backpack
Our social commitment

A school kit donated to a child for every training booked

To fight inequalities in access to education, Learni donates a complete school kit to a child in need for every training booked. You build your skills, a child heads back to school.

  • Backpack, notebooks and essential supplies
  • Distributed through our partner charities
  • Included, at no extra cost to you
Enroll and offer a kit
FAQ

Babel: frequently asked questions

Which tools are used in Babel training?+
Hands-on work runs on CLI, node, ES6+ Presets, browserslist, polyfills and webpack. Those tools come from the Babel program itself, delivered on site over 3 days, so participants practise on the stack they will use at work.
What can participants do after Babel training?+
They can master the basics of Babel for transpiling professional JavaScript code, develop skills in Babel configuration for certified enterprise environments and implement Babel presets and plugins in real projects. Those are the stated objectives of the Babel program at Beginner level, checked by the end-of-session assessment.
What does the Babel program cover, day by day?+
Day 1: Babel Fundamentals: Installation and First Transpils (CLI, Node, ES6+ Presets). Day 2: Babel Configuration: Presets, Plugins and Browser Target (browserslist, Polyfills). Day 3: Babel Integration: Advanced Projects and Optimization (Webpack, Business Cases, Deployment). The Babel program runs over 3 days, delivered on site.
How is Babel training assessed?+
Assessment relies on multiple-choice quiz to validate acquired knowledge at the end of the training, continuous evaluation through practical Babel exercises and presentation of the ongoing transpilation project. Learni issues a completion certificate together with the individual assessment report at the end of the Babel program, which an L&D team can file as evidence.
How much does Babel training cost per participant?+
Babel training costs $3,465 per participant. For an in-company team, the flat rate starts at $6,290 for the whole group, up to 8 people. The detailed quote, sent within one business day, adjusts the amount to the format and how far the syllabus is tailored to your team.
How long does Babel training take?+
3 days, available live online (US time zones) or on-site at your offices. Half-day tracks spread over several weeks are possible so the team stays operational.
Who pays for Babel training?+
Most US teams pay directly through their company L&D or training budget. Learni invoices in US dollars and accepts bank transfer (ACH/wire) or card, with volume pricing for teams. A purchase order is welcome.
What do participants need to know before Babel training?+
Basic knowledge of JavaScript ES5 and Node.js project management.
Is a certificate issued after Babel training?+
Yes. A Learni completion certificate is issued, along with the individual evaluation report. Learni is a certified training provider and prepares for third-party certifications, but does not award them itself.
Does Learni provide the equipment for Babel training?+
No. A computer and a stable internet connection are required for each participant. Learni provides the learning platform, the trainer and all course materials.
Your professional training, anywhere

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