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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.
10 spots per session maximum — 7 already taken
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Without mastery of data validation in JavaScript with Joi, Node.js applications are plagued by invalid inputs that corrupt databases and expose APIs to attacks.
Studies show 74% of web application vulnerabilities, including injection flaws, stem from inadequate validation (OWASP 2023), costing businesses an average of $4.45 million per data breach (IBM Cost of a Data Breach Report 2023).
Backend developers waste 20-30 hours weekly on preventable data errors, delaying deployments and inflating maintenance costs by 40%.
Every month without these skills, your team's projects risk compliance failures, customer churn, and stalled career growth in a data-driven market.
The Training: Mastering Data Validation in JavaScript with Joi: From Beginner to Expert 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 Training: Mastering Data Validation in JavaScript with Joi: From Beginner to Expert 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 Training: Mastering Data Validation in JavaScript with Joi: From Beginner to Expert 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.
Introduction to data validation (issues, risks, performance). Presentation of Joi: philosophy, installation, first simple schema examples. Hands-on practice on basic type validation (strings, numbers, booleans, dates). Handling common constraints: required, optional, default, allow, forbidden.
Validation of complex structures: nested objects, arrays, alternative schemas, conditional validations, customization of rules with Joi.extend(). Setting up validation in Express.js at the route level, automatic or manual handling of validation errors. Exercises on REST API flow validation and centralized validation management.
Fine customization of error messages, structuring user feedback according to business needs. Introduction to plugins and the Joi ecosystem. Managing incoming data security, protection against common vulnerabilities. Automating unit tests with Jest and supertest to ensure schema robustness. Project workshop: secure an existing small API with Joi.
10 participants max.
$3,812 / per person
3 days
remoteTarget audience
Backend or full-stack developers, teams working with Node.js, data quality managers
Prerequisites
Basic knowledge of JavaScript and Node.js applications
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remote8 pers. max.Intermediate€3,465.003 daysremote8 pers. max.Beginner€1,155.001 dayremote10 pers. max.Beginner€1,155.001 dayremote12 pers. max.
