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.
Founded by passionate learning and innovation experts, Learni's mission is to make professional training accessible to everyone, anywhere in the world. Our team operates in major hubs — London, New York, Boston — and internationally, to support talents and organizations in upskilling.
Don't let this gap widen
Without this upskilling, your team accumulates a technological gap that translates directly into productivity loss.
Organizations that don't train their talents on key topics see their competitiveness drop.
Every quarter without training is a gap widening with competitors who invest.
The cost of inaction quickly exceeds that of well-targeted training.
Quick installation of Babel via npm in a real project, configuration of the babel.config.json file to activate env and typescript presets, first transpilation tests on ES2022 code to ES5, practical exercises to transform import/export modules, debugging common errors with babel-node, production of a first compatible bundle, and documentation of the setup for the team.
Exploration of official plugins like @babel/plugin-proposal-class-properties and creation of chained configurations, application to real business cases with async/await and decorators, unit tests before/after transpilation via Jest, resolution of plugin conflicts, collaborative workshops to build a simple plugin, validation of transformations with coverage tools, and export of a compatibility report.
In-depth configuration of babel-loader in webpack.config.js for multi-entry projects, optimization of source maps for production debugging, bundling modern code with tree-shaking, simulations of business workflows on a React/Vue app, performance gains measurement via Lighthouse, exercises to integrate TypeScript and SVGs, finalization of a reproducible and automated build pipeline.
Precise definition of targets via browserslist for IE11 and legacy mobiles, integration of core-js polyfills without bloating the bundle, cross-browser tests on BrowserStack, handling dynamic modules import(), workshops on optimization for business edge cases, bundle size analysis with webpack-bundle-analyzer, creation of a browser support report, and migration plan for legacy code.
Babel integration into GitHub Actions for automated builds, comparison with Rollup and esbuild for ultra-fast performance, monitoring transpilation errors in production via Sentry, case studies on enterprise app refactoring, finalization of the ongoing project with Vercel/Netlify deployment, collective code review, delivery of configured templates, and maintenance strategy for continuous productivity gains.
The Training Babel - Modern JS Transpiler for All Browsers program is delivered onsite or remote (blended-learning, e-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 - Modern JS Transpiler for All Browsers 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 - Modern JS Transpiler for All Browsers 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.
Learni programs are available inter-company and intra-company, onsite or remote. Enrollments are possible up to 48 business hours before the program starts. Our programs are eligible for corporate funding paths. Contact us to discuss your training project and funding options.
« cool, j'ai appris des trucs »
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
« 😊👍 »
« bien 👍 »
« Allan Busi t'es au top, continue comme ça. formation géniale »
« cool, j'ai appris des trucs »
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
« 😊👍 »
« bien 👍 »
« Allan Busi t'es au top, continue comme ça. formation géniale »
« cool, j'ai appris des trucs »
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
« 😊👍 »
« bien 👍 »
« Allan Busi t'es au top, continue comme ça. formation géniale »
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.
Développement JavaScriptIndustry-certified
Développement JavaScriptIndustry-certified
Développement JavaScriptIndustry-certified
Développement JavaScriptIndustry-certified
Développement JavaScriptIndustry-certified
Développement JavaScriptIndustry-certified
Développement WebIndustry-certified
Développement WebIndustry-certified
Développement WebIndustry-certified
Développement WebIndustry-certified
Développement WebIndustry-certified
Développement WebIndustry-certified
Langages de ProgrammationIndustry-certified
Langages de ProgrammationIndustry-certified
Langages de ProgrammationIndustry-certified
Langages de ProgrammationIndustry-certified
Langages de ProgrammationIndustry-certified
Langages de ProgrammationIndustry-certified
Frameworks & BibliothèquesIndustry-certified
Frameworks & BibliothèquesIndustry-certified
Frameworks & BibliothèquesIndustry-certified
Frameworks & BibliothèquesIndustry-certified
Frameworks & BibliothèquesIndustry-certified
Frameworks & BibliothèquesIndustry-certified30 minutes with a learning advisor. No commitment. No sales pitch dressed up as a demo.