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.
Training ESLint 2026 - Optimizing JavaScript Code Quality
Trusted by — schools, companies and industrial groups
40,842 programs · 25 countries
Every program built with a dedicated engineer
Companies: Aptar, ArcelorMittal, Equans, EDF, Ubisoft and Microsoft.
ESLint training objectives
- Master ESLint 2026 for professional certifying projects
- Develop advanced and custom ESLint configurations
- Implement linting rules to boost team competencies
- Integrate ESLint into enterprise CI/CD workflows
- Optimize ESLint performance on large codebases
- Design ESLint plugins for specific business needs
ESLint curriculum: 5 modules over 5 days
Module 1 : ESLint 2026 Fundamentals: Installation and Basic Configuration (flat config, CLI)
Discover the new flat config in ESLint 2026, install the environment via npm, yarn, pnpm on real projects, configure recommended presets for modern JavaScript and TypeScript, test core rules on existing code with practical exercises, generate your first linting report and automatically fix errors using --fix, apply everything to a company red thread project for immediate code quality improvement.
Module 2 : ESLint 2026 Rules: Advanced Customization and Overrides (custom rules, severity)
Dive into the 300+ ESLint 2026 rules, create tailored configurations with overrides by file or glob patterns, prioritize errors via error, warn, off, develop custom rules in pure JavaScript with AST nodes, test on concrete refactoring cases for legacy code, integrate common anti-patterns like no-unused-vars or prefer-const, produce an optimized .eslintrc.yaml file ready for production.
Module 3 : ESLint 2026 Integration: IDE Editors and CI/CD Pipelines (VS Code, GitHub Actions)
Configure ESLint 2026 in VS Code and WebStorm via official extensions, enable real-time linting with auto-fix on save, integrate into Git hooks like pre-commit with Husky, deploy on CI/CD with GitHub Actions and Jenkins including quality coverage thresholds, analyze HTML and JSON reports for team code reviews, practice on a collaborative Git project to detect bugs early, transform your dev workflow into a clean and scalable code machine.
Module 4 : ESLint 2026 Performance: Optimizing Large Projects (cache, parallel plugins)
Optimize ESLint 2026 on monorepos using persistent cache and worker threads, benchmark linting times before and after with --timings, integrate popular plugins like eslint-plugin-import and Prettier, manage rule conflicts across multi-frameworks like React and Next.js, migrate legacy configs to flat config without downtime, apply strategies for 100k+ lines of code, deliver a custom performance dashboard showing ROI in time saved for the team.
Module 5 : Advanced ESLint 2026: Custom Plugins and Extended Ecosystem (TypeScript, security)
Develop ESLint 2026 plugins from scratch using visitor patterns API, integrate eslint-plugin-security for OWASP vulnerabilities, extend to TypeScript and JSX via dedicated parsers, automate migrations of obsolete rules, test exhaustively with Mocha and Jest, deploy to production with lint error monitoring, finalize the certifying red thread project with a full audit and maintenance plan, gain recognized expertise in enterprise code quality.
How ESLint skills are assessed
- Multiple-choice quiz to validate learning outcomes at the end of the training
- Continuous assessment through practical exercises
- Presentation of the red thread project to the trainer
How the ESLint course is taught
- Courses led by an active expert trainer
- Practical exercises on real business cases
- Progressive red thread project throughout the training
- Complete course materials provided to each participant
ESLint training: access and practical arrangements
The Training ESLint 2026 - Optimizing JavaScript Code Quality 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 ESLint 2026 - Optimizing JavaScript Code Quality 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 ESLint 2026 - Optimizing JavaScript Code Quality 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 ESLint 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.
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.
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
FAQ
ESLint: frequently asked questions
Which tools are used in ESLint 2026 training?+
Hands-on work runs on flat config, CLI, custom rules, severity, VS Code and gitHub Actions. Those tools come from the ESLint 2026 program itself, delivered on site over 5 days, so participants practise on the stack they will use at work.
What can participants do after ESLint 2026 training?+
They can master ESLint 2026 for professional certifying projects, develop advanced and custom ESLint configurations and implement linting rules to boost team competencies. Those are the stated objectives of the ESLint 2026 program at Intermediate level, checked by the end-of-session assessment.
What does the ESLint 2026 program cover, day by day?+
Day 1: ESLint 2026 Fundamentals: Installation and Basic Configuration (flat config, CLI). Day 2: ESLint 2026 Rules: Advanced Customization and Overrides (custom rules, severity). Day 3: ESLint 2026 Integration: IDE Editors and CI/CD Pipelines (VS Code, GitHub Actions). Day 4: ESLint 2026 Performance: Optimizing Large Projects (cache, parallel plugins). Day 5: Advanced ESLint 2026: Custom Plugins and Extended Ecosystem (TypeScript, security). The ESLint 2026 program runs over 5 days, delivered on site.
How is ESLint 2026 training assessed?+
Assessment relies on multiple-choice quiz to validate learning outcomes at the end of the training, continuous assessment through practical exercises and presentation of the red thread project to the trainer. Learni issues a completion certificate together with the individual assessment report at the end of the ESLint 2026 program, which an L&D team can file as evidence.
How much does ESLint 2026 training cost per participant?+
ESLint 2026 training costs $5,775 per participant. For an in-company team, the flat rate starts at $10,395 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 ESLint 2026 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 ESLint 2026 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 ESLint 2026 training?+
Solid knowledge of JavaScript ES6+, Node.js, and Git project management.
Is a certificate issued after ESLint 2026 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 ESLint 2026 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
Let's build your ESLint learning path.
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
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