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.
1 seat held for the next session
30:00Held for another
Request a call back and an advisor reaches you within 24 business hours, Monday to Saturday.
Intermediate JavaScript Training - Master the DOM and Asynchronous Programming
Trusted by — schools, companies and industrial groups
Every program built with a dedicated engineer
Learning objectives
- Master closures and advanced scopes
- Use promises and async/await effectively
- Dynamically and efficiently manipulate the DOM
- Manage complex events and listeners
- Optimize code for superior web performance
- Develop reusable modules
- Integrate external APIs into real projects
Our social commitment
A school kit donated to a child for every training
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
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.
Don't let this gap widen
Why this program matters
Without mastering intermediate JavaScript, 70% of web bugs persist, slowing your sites by 40% and driving away 53% of mobile visitors according to Google.
Your apps stay basic, impossible to scale, losing contracts to fluid competitors.
85% of job offers require advanced async/DOM: stay stuck on junior tasks, with stagnant salary at 35k€/an.
Avoid costly rewrites (up to 10k€ per failed project), client complaints about responsiveness, and falling behind on frameworks like React.
Invest 21h to multiply your employability by 3, from the first boosted mission.
Program
Module 1Advanced Functions and Objects: Closures, Prototypes (VS Code, Practical Exercises)
Dive into first-class functions, explore closures to encapsulate data, prototype custom objects with interactive exercises in VS Code, build a mini user management project, test in real-time to visualize scopes, leave with reusable patterns that boost your productivity starting tomorrow.
Module 2Asynchronous Programming and DOM: Promises, Fetch, Manipulation (Chrome DevTools, Real-World Cases)
Master promises and async/await for smooth API calls, manipulate the DOM with querySelector and createElement through exercises on real web pages, integrate fetch to load dynamic data, debug with Chrome DevTools, build an interactive dashboard, gain fluidity and modernity for ultra-responsive sites.
Module 3Performance and Modules: Optimization, ES6+ (Webpack, Final Deliverable Project)
Optimize your code with debounce, ES6 modules, and Webpack for scalable apps, profile performance via Lighthouse, apply advanced techniques to a complete e-commerce project, generate a portfolio-ready deliverable, consolidate with a practical quiz, graduate certified and ready to deploy pro solutions that impress recruiters.
Evaluation method
- Interactive quizzes at the end of each day
- Graded practical exercises
- Final project with personalized feedback
- Qualiopi certificate for acquired skills
Learning method
- 70% hands-on practice on real business cases
- Active pedagogy with pair work
- Professional tools: VS Code, DevTools, Webpack
Methods, materials and delivery
The Intermediate JavaScript Training - Master the DOM and Asynchronous Programming 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 Intermediate JavaScript Training - Master the DOM and Asynchronous Programming 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 Intermediate JavaScript Training - Master the DOM and Asynchronous Programming 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.
Our method
Training quality, guaranteed at every step
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.
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.
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.
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.
Suggestions
You might
like these too.
IoT & embedded systemsIndustry-certifiedTraining MQTT - Master the IoT Protocol for Connected Projects
$4,620Net of tax
JavaScript & TypeScriptIndustry-certifiedTraining Pixi.js Advanced - Optimize High-Performance 2D Renders
$3,675Net of tax
Automated testingIndustry-certifiedTraining Vitest Advanced - Ultra-Fast & Reliable JS Tests
$2,625Net of tax
Web developmentIndustry-certifiedIntermediate Angular Training - Master Components & Services
$2,625Net of tax
JavaScript & TypeScript
More programs in JavaScript & TypeScript.
JavaScript & TypeScriptIndustry-certifiedAdvanced Electron Training - Create Cross-Platform Desktop Apps
$2,625Net of tax
JavaScript & TypeScriptIndustry-certifiedAdvanced JavaScript Training - Boost Your High-Performance Web Apps
$1,470Net of tax
JavaScript & TypeScriptIndustry-certifiedAdvanced JavaScript Training - Master ESNext and Performance
$1,470Net of tax
JavaScript & TypeScriptIndustry-certifiedAdvanced Qwik Training - Boost Your Ultra-Fast Web Apps
$5,775Net of tax
JavaScript & TypeScriptIndustry-certifiedAdvanced Sequelize Training - Master Performance and Relationships
$5,775Net of tax
JavaScript & TypeScriptIndustry-certifiedAdvanced TypeScript Training - Safe and Scalable Types
$3,675Net of tax
Web development
More programs in Web development.
Web developmentIndustry-certifiedASP.NET Core : Maîtriser le Développement Web Moderne
$5,775Net of tax
Web developmentIndustry-certifiedAWS Auto Scaling : Maîtriser la gestion dynamique des ressources Cloud
$3,675Net of tax
Web developmentIndustry-certifiedAWS Auto Scaling : Maîtriser l’élasticité du Cloud pour optimiser ses ressources AWS
$2,625Net of tax
Web developmentIndustry-certifiedAWS CLI : Maîtrisez l’Interface en Ligne de Commande Amazon Web Services
$3,675Net of tax
Web developmentIndustry-certifiedAWS CLI Training - Automating Advanced Cloud Tasks
$2,625Net of tax
Web developmentIndustry-certifiedAWS Expert Training - Scalable Secure Cloud Architectures
$4,620Net of tax
Data visualisation
More programs in Data visualisation.
Data visualisationIndustry-certifiedAutomatisez vos tests d’interfaces graphiques avec SikuliX : De l’initiation à la maîtrise
$3,675Net of tax
Data visualisationIndustry-certifiedComplete Maltego Training: Mastering Graphical Data Investigation and OSINT
$3,675Net of tax
Data visualisationIndustry-certifiedCréation et Visualisation de Dashboards Temps Réel : De la Donnée à la Décision
$3,675Net of tax
Data visualisationIndustry-certifiedCréer des Dashboards Performants pour le Pilotage de l’Entreprise
$3,675Net of tax
Data visualisationIndustry-certifiedCréer et Optimiser des Dashboards Professionnels : De l’Analyse à la Visualisation
$3,675Net of tax
Data visualisationIndustry-certifiedD3.js Expert Training - Master Advanced Interactive Visualizations
$1,470Net of tax
Automated testing
More programs in Automated testing.
Automated testingIndustry-certifiedATDD : Maîtriser l’Acceptance Test Driven Development en équipes agiles
$3,675Net of tax
Automated testingIndustry-certifiedAdvanced Playwright Training - Efficiently Automate Complex Web Tests
$2,625Net of tax
Automated testingIndustry-certifiedAdvanced Selenium Training - Automate Complex Web Tests
$4,620Net of tax
Automated testingIndustry-certifiedAdvanced Selenium Training - Automate Web Tests Like a Pro
$5,775Net of tax
Automated testingIndustry-certifiedArtillery Training - Test the Load of Your APIs in 1 Day
$1,470Net of tax
Automated testingIndustry-certifiedAutomatisation des Tests Web avec Puppeteer : Maîtrisez le Contrôle de Votre Navigateur
$2,625Net of tax
FAQ
Frequently asked questions
How much does the Intermediate JavaScript Training - Master the DOM and Asynchronous Programming training cost?+
The price is $3,675 (USD) per participant. A detailed quote is sent within one business day.
How long is the Intermediate JavaScript Training - Master the DOM and Asynchronous Programming training?+
The training lasts 3 journées, available live online (US time zones) or on-site at your offices.
How is this training paid for?+
Most US teams pay directly through their company (L&D or training budget). We invoice in US dollars and accept bank transfer (ACH/wire) or card, with volume pricing for teams. A purchase order is welcome.
Are there any prerequisites?+
Mastery of JavaScript basics (variables, functions, arrays), HTML and CSS
Is a certificate delivered at the end?+
Yes. A Learni completion certificate is issued, along with the individual evaluation report.
Does Learni provide the equipment?+
No. A computer and stable internet connection are required for the participant. Learni provides the educational platform, the trainer and all course materials.
On-site & remote
This training across cities
Available on-site and remotely. Pick your city to see the local training center.
Your professional training, anywhere
Let's build
your next
program.
30 minutes with a learning advisor. No commitment. No sales pitch dressed up as a demo.
Reply within 24h · Vetted experts · USD invoicing · W-9 available