Training JavaScript Advanced - Master ES6+ and Scalable Apps

Specialist course · Minimum level required

$7,875

  • 5 days
  • Onsite
  • 10 people max.
Ref: GKR490
10 people max.
$7,875
In-company rate: from $14,175 for the whole teamExpertise rate: $1,575 per day, reflecting the difficulty level
On-site and certification exam on quote
5 days
Onsite

Don't let this gap widen

Why this program matters

  • Without this advanced training, risk obsolescence: 70% of JS devs stagnate on ES5, losing 25% of freelance projects according to Stack Overflow.

  • Your slow apps generate 40% user drop-offs, costing thousands in churn.

  • Competitors mastering async/await secure +30% salaries (average 65k€/year).

  • Avoid critical production bugs, like 60% unmanaged memory leaks.

  • Miss internal promotions without advanced prototypes.

  • Invest 35h to double productivity, secure your career, and dominate the exploding JS market (+22% job offers 2024).

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

41,306 programs · 25 countries

  • Aptar
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  • 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.

JavaScript Advanced training objectives

  • Master ES6+ features like arrow functions and destructuring.
  • Implement asynchronous programming with async/await and Promises.
  • Optimize performance via closures, prototypes, and modules.
  • Develop scalable applications with Web Workers and Service Workers.
  • Integrate advanced patterns for robust and maintainable code.
  • Build and deploy real projects with tools like Webpack and Babel.
  • Analyze and debug complex code in production.

Program

JavaScript Advanced curriculum: 5 modules over 5 days

Module 1 : ES6+ and Modern Syntax: Master New Features (arrows, classes, modules)

Dive into ES6+ by refactoring legacy code with destructuring, spread operators, and template literals. Complete practical exercises on classes and inheritance. Build a functional import/export module. Test live with Babel to transform your development approach and gain immediate productivity on real refactoring cases.

Module 2 : Asynchronous Programming: Promises, async/await, and Error Handling

Deepen asynchronous programming by chaining Promises for multiple API calls. Implement async/await in real scenarios like fetching from remote endpoints. Handle rejections with try/catch. Simulate network latencies through interactive exercises. Produce a robust script for a dynamic dashboard, transforming your apps into smooth, reactive experiences.

Module 3 : Advanced Concepts: Closures, Prototypes, and Object Patterns

Explore closures for secure private modules. Manipulate prototypal inheritance for performant objects. Apply patterns like Observer and Singleton to enterprise cases. Code collaborative exercises in pair programming. Generate testable deliverables with Jest. Unlock JavaScript's hidden potential for elegant architectures.

Module 4 : Performance and Optimization: Web APIs, Workers, and Memory

Optimize with Web Workers for CPU-intensive tasks. Integrate Service Workers for offline-first PWAs. Profile memory via Chrome DevTools on real apps. Reduce memory leaks through targeted exercises. Benchmark before/after with Lighthouse. Deploy measurable gains up to 40% faster, propelling your projects to technical excellence.

Module 5 : Integrative Projects and Best Practices: Deployment and CI/CD

Build a fullstack app with Node.js and bundlers like Webpack. Integrate CI/CD via GitHub Actions. Review security and scalability best practices. Present your project in a final pitch. Receive personalized feedback. Leave with a concrete portfolio and certificate to boost your career immediately.

How JavaScript Advanced skills are assessed

  • Continuous assessment through interactive quizzes, graded final project, self-assessment of skills before/after.

How the JavaScript Advanced course is taught

  • Active pedagogy with 70% hands-on practice, small group workshops, personalized video feedback.

JavaScript Advanced training: access and practical arrangements

The Training JavaScript Advanced - Master ES6+ and Scalable Apps 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 JavaScript Advanced - Master ES6+ and Scalable Apps 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 JavaScript Advanced - Master ES6+ and Scalable Apps 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 JavaScript Advanced 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

JavaScript Advanced: frequently asked questions

Which tools are used in JavaScript Advanced training?+
Hands-on work runs on arrows, classes and modules. Those tools come from the JavaScript Advanced program itself, delivered on site over 5 days, so participants practise on the stack they will use at work.
What can participants do after JavaScript Advanced training?+
They can master ES6+ features like arrow functions and destructuring, implement asynchronous programming with async/await and Promises and optimize performance via closures, prototypes, and modules. Those are the stated objectives of the JavaScript Advanced program at Advanced level, checked by the end-of-session assessment.
What does the JavaScript Advanced program cover, day by day?+
Day 1: ES6+ and Modern Syntax: Master New Features (arrows, classes, modules). Day 2: Asynchronous Programming: Promises, async/await, and Error Handling. Day 3: Advanced Concepts: Closures, Prototypes, and Object Patterns. Day 4: Performance and Optimization: Web APIs, Workers, and Memory. Day 5: Integrative Projects and Best Practices: Deployment and CI/CD. The JavaScript Advanced program runs over 5 days, delivered on site.
How is JavaScript Advanced training assessed?+
Assessment relies on continuous assessment through interactive quizzes, graded final project, self-assessment of skills before/after. Learni issues a completion certificate together with the individual assessment report at the end of the JavaScript Advanced program, which an L&D team can file as evidence.
How much does JavaScript Advanced training cost per participant?+
JavaScript Advanced training costs $7,875 per participant. For an in-company team, the flat rate starts at $14,175 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 JavaScript Advanced training take?+
5 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 JavaScript Advanced 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 JavaScript Advanced training?+
Mastery of JavaScript ES5, knowledge of DOM, fetch API, and Node.js environments.
Is a certificate issued after JavaScript Advanced 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 JavaScript Advanced 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.
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