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Founded by passionate advocates of learning and innovation, Learni set out to make professional training accessible to everyone, everywhere in the world. Our team works in the largest cities such as Paris, Lyon, Marseille, and internationally, to support talents and organizations in their skills development.
Which format do you prefer?
30 free minutes with a training advisor — no commitment.
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Artificial Intelligence training in Raleigh in June 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
Professional Training training in Memphis in October 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
Cybersecurity training in Oklahoma City in December 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
Professional Training training in New York in September 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
Don't let this gap widen
Without expert SASS mastery, your CSS styles explode in maintenance: +40% time lost on refactoring, inheritance bugs costing 20h/week to a senior dev, slow sites penalized -30% Google traffic (Core Web Vitals), teams blocked by spaghetti code, competition outpaced by modular frameworks.
Risk 15k€/year in lost productivity?
Invest 4 days to divide your styling deadlines by 3, scale without limits, and boost project ROI to 200%.
Don't let obsolete CSS sabotage your critical deadlines.
The SASS Expert Training - Optimize Advanced CSS in 4 Days training is delivered in-person or remotely (blended-learning, e-learning, virtual classroom, remote in-person). At Learni, a Qualiopi-certified training organization, each program is designed to maximize skills acquisition, regardless of the training mode chosen.
The trainer alternates between demonstrative, interrogative, and active methods (through practical exercises and/or real-world scenarios). This pedagogical approach ensures concrete and directly applicable learning in the workplace.
To ensure the quality of the SASS Expert Training - Optimize Advanced CSS in 4 Days training, Learni provides the following teaching resources:
For in-house training at a location external to Learni, the client ensures and commits to having all necessary teaching materials (IT equipment, internet connection...) for the proper conduct of the training action in accordance with the prerequisites indicated in the communicated training program.
The assessment of skills acquired during the SASS Expert Training - Optimize Advanced CSS in 4 Days training is carried out through:
Learni is committed to the accessibility of its professional training programs. All our training programs are accessible to people with disabilities. Our teams are available to adapt teaching methods to your specific needs. Do not hesitate to contact us for any accommodation request.
Learni training programs are available for inter-company and intra-company settings, both in-person and remote. Registration is possible up to 48 business hours before the start of training. Our programs are eligible for OPCO, Pôle emploi, and FNE-Formation funding. Contact us to discuss your training project and funding possibilities.
Dive into nested mixins and dynamic maps with VSCode and Dart Sass, complete exercises on conditional variables, build a reusable mixins library for flexible grids, test live on real projects, gain immediate productivity and desire to scale your CSS styles.
Explore @each and @for loops to generate variants, apply @if/@else conditions on dark/light themes, develop practical scalable animation exercises, integrate maps for advanced color palettes, produce an automated CSS generator, transform your workflows into a performant style machine.
Create custom mathematical functions for precise spacing, structure in 7-1 pattern with abstracts and utils, use PostCSS for debugging, complete concrete e-commerce app cases, generate a complete modular project, master scalability for agile teams and boost your architectural expertise.
Optimize via selective @extend and conditional imports, integrate SASS into Webpack/Vite for React/Vue, analyze performance with Lighthouse, develop final responsive themed interface project, export ultra-light bundle, leave with production-ready skills and technical leadership.
Target audience
Senior front-end developers, CSS architects, lead developers upskilling in SASS.
Prerequisites
Expert mastery of CSS3, experience with preprocessors like LESS, build tools (Webpack, Gulp).
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