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.
Describe your need, get a tailored program and a pre-filled quote in 3 min. A 100% free call with an advisor.
1 seat held for the next session
Request a call back and an advisor reaches you within 24 business hours, Monday to Saturday.

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.
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.
Don't let this gap widen
Without Babel mastery, 65% of JS projects fail cross-browser compatibility, causing 20-30% losses in application performance according to State of JS 2023.
Teams lose weeks on legacy debugging, impacting delivery timelines by up to 40% and increasing client support costs.
Careers stagnate: non-Babel-ready developers miss DevOps promotions, companies risk talent churn against agile competitors.
Invest now to secure your modern stacks and boost project ROI.
Install Babel via npm in a professional Node.js environment, configure the babel.config.js file to transpile ES2020 to ES5, perform practical exercises on import/export modules, test compatibility with legacy browsers like IE11, generate your first transpiled bundles ready for enterprise deployment, validate the basics with concrete cases for technical trainers.
Explore the @babel/preset-env preset for targeted compatibility, install and configure plugins like @babel/plugin-proposal-class-properties, apply them to real React/Vue projects, measure bundle size gains using tools like webpack-bundle-analyzer, develop a custom preset for specific training certification needs, analyze common errors and solutions in a pedagogical context.
Configure babel-loader in Webpack for a smooth build chain, enable sourcemaps for precise production debugging, integrate Babel into monorepos with Yarn Workspaces, test on enterprise-scale applications with async/await transpilation, optimize for mobile-first via browserslist targets, produce deployable assets for Netlify or Vercel, apply to web development trainer scenarios.
Reduce unnecessary polyfills with @babel/preset-env and core-js@3, enable loose mode for more readable code, profile builds with tools like Lighthouse, implement transformations for dynamic modules, test bundle size reduction up to 40% on real cases, integrate with CI/CD GitHub Actions, prepare optimization reports for enterprise pedagogical teams.
Migrate a legacy codebase to Babel 8, manage multi-environment configurations for dev/staging/prod, develop a complete workshop with practical exercises, evaluate skills via a final certifying project, share best practices for trainers, access post-training resources, consolidate learning for immediate application in a certified professional Qualiopi context.
The Training Babel - Mastering the Modern JS Transpiler 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.
For the smooth delivery of the Training Babel - Mastering the Modern JS Transpiler program, the following equipment is required:
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.
Assessment of skills acquired during the Training Babel - Mastering the Modern JS Transpiler program is performed through:
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.
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.
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.
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.
JavaScript & TypeScriptIndustry-certified
JavaScript & TypeScriptIndustry-certified
JavaScript & TypeScriptIndustry-certified
JavaScript & TypeScriptIndustry-certified
JavaScript & TypeScriptIndustry-certified
JavaScript & TypeScriptIndustry-certified
JavaScript & TypeScriptIndustry-certified
JavaScript & TypeScriptIndustry-certified
JavaScript & TypeScriptIndustry-certified
JavaScript & TypeScriptIndustry-certified
LeadershipIndustry-certified
LeadershipIndustry-certified
LeadershipIndustry-certified
LeadershipIndustry-certified
LeadershipIndustry-certified
LeadershipIndustry-certified
Personal effectiveness & growthIndustry-certified
Personal effectiveness & growthIndustry-certified
Personal effectiveness & growthIndustry-certified
Personal effectiveness & growthIndustry-certified
Personal effectiveness & growthIndustry-certified
Personal effectiveness & growthIndustry-certified
Digital marketing & strategyIndustry-certified
Digital marketing & strategyIndustry-certified
Digital marketing & strategyIndustry-certified
Digital marketing & strategyIndustry-certified
Digital marketing & strategyIndustry-certified
Digital marketing & strategyIndustry-certifiedAvailable on-site and remotely. Pick your city to see the local training center.
30 minutes with a learning advisor. No commitment. No sales pitch dressed up as a demo.