Advanced TypeScript training

Curriculum

Function overloading

• Concepts
• Pitfall: that last signature…
• Generic functions vs. overloading

Template Literal Types

• Benefits
• Use cases
• Beware of combinatorials

typeof / keyof refresher

• typeof: moving from values to types
• keyof use cases
• Operator precedence

Mapped types

• Principles
• Simple mapped types
• Key filtering
• Key remapping
• IIMT

Conditional types

• Principles
• The ternary operator
• extends (single or chained)
• Distributivity of unions

infer

• Principles
• A “local variable” for our types
• Usage by built-in utilities
• Use cases

Recursive types

• Principles
• Iterating over a type
• Combining with conditional types
• Differentiating between tuple, array and non-empty array
• Combining with infer
• A type-level parser?

Namespaces

• What for?
• Usage criteria
• Using types from a namespace
• The global namespace

Typing classes

• Classes
• Constructor and methods
• Fields
• Visibility
• Strict mode impacts

Decorators

• Use cases
• Semantics
• Implementing decorators

Declaration (.d.ts) files and ambient types

• Use cases
• Declaration files vs. namespaces
• Specific syntax
• Usage precautions

Extended JSDoc blocks: another way to type

• JSDoc refresher
• TSDoc?
• TypeScript-specific directives
• Caveats

Trainer

Christophe Porteneuve

Christophe has been doing professional web work since 1995. He co-created Europe’s first production JSP portal in 1999, moving to J2EE before going with Ruby, Rails and finally Node.js.

A best-selling author of“Bien développer pour le Web 2.0” (“Best practices for modern web development”) at Eyrolles, he also wrote the reference book “Prototype and script.aculo.us” at Pragmatic Programmers, articles in various online magazines (most notably the widely-acclaimed A List Apart), and speaks at a number of conferences big and small.

In France, Christophe enjoys a solid reputation of expertise in the areas of front-end web dev (most notably JavaScript), Node.js, Git and Rails.

Christophe is the founder and CTO of Delicious Insights.

• LinkedIn
• Twitter @porteneuve
• GitHub tdd
• YouTube
• Books

Intended audience

The Advanced TypeScript training course is for anyone with a good existing TypeScript development background. This could either be on personal or professional projects.

Pre-requisites

This course comes with prerequisites on TypeScript, which are assessed through a tech questionnaire ahead of confirming your registration. Expected existing skills include:

• Set-based typing model
• Roles of unknown, never and any
• Primitive and literal types
• Unions and discriminating unions
• Strict mode
• Narrowing
• Generic types and functions
• typeof and keyof

Logistics

• Every session is held synchronously, “live,” including remote sessions. This is not about pre-recorded videos.
• We are currently not scheduling new multi-client in-room sessions before, at the earliest, April 1st, 2022.
• Comprehensive course material is provided, acting as a common thread. It usually includes numerous slides and starter codebases or repositories for every exercise and lab.
• Trainees can ask questions at any time.
• Sessions always alternate between theory and hands-on labs, in short intervals (5 minutes to 1 hour).
• Hands-on periods rely on real-world use-cases (which can be bootstrapped through starter codebases, Git repositories or online assignment labs).
• Hands-on periods may be completed individually or as sub-groups that may vary from one period to the next, to foster pair programming and collaboration.
• Remote sessions use a Zoom recurring meeting, accessible through a provided link using both the installed app and the pure-web, no-install client. They mostly use features such as video thumbnails, screensharing, chat, breakout rooms and possibly quizzes, annotations and whiteboards.

Deliverables & assessments

• Every session half-day requires attendance signing (paper sheet or digital tool). For remote sessions, should a trainee fail to submit their entire attendance sheet in due time, Zoom participant logs will be considered authoritative.
• At the beginning of every day’s first period, we run a “debrief”: during about half an hour, we help collectively resurface skills and knowledge first tackled on the previous day. This helps put everyone back “in the zone,”, consolidate learning and boost group dynamics.
• Throughout the course, assessment of skill acquisition is done through the successful completion of hands-on labs (exercises, mini-projects, labs, use cases, etc.). Interactive quizzes may supplement this. The trainer remains available for any question during hands-on periods.
• Should a trainee exhibit significant difficulty, the trainer may opt to provide one-to-one mentoring for a while using the trainee’s computer as a working base. This also applies to remote sessions using Zoom’s dedicated features (e.g. one-to-one / individual assistance).
• When the session ends, every trainee may request a completion certificate (or at least attendance certificate) and, for remote sessions financed by a French institutional entity, we issue a standardized completion certificate in order for financing to be able to proceed smoothly.
• Once the training is over, every trainee receives a link to an online “hot” feedback survey, so they can express, among other things, whether they feel they achieved the stated goals of the training (or believe these will be achieved in the short term).

At every start of a training slot, trainees get access to:

• full slides in a web format, so they can follow along easily,
• online assignment sandboxes

After the session, they also get:

• a large debrief e-mail with tons of extra resources,
• a reference archive with all the slides and commented solutions to all exercises

Assessing acquired skills is done throughout the training through online interactive exercises that have automatic guidance and grading.

Hardware & software requirements

• Use a sufficiently powerful laptop, properly set up (in particular, having followed whatever training-specific setup guide might have been linked to in the summons e-mail or training’s web page).
• This laptop must be equipped with a webcam, microphone and audio output (preferrably using a headset or earphones, to avoid feedback).
• Use an internet access with a minimal bandwidth of 1Mbps both ways, with an ideal minimum of 5Mbps (test your bandwidth here)
• Be able to run Zoom, either as a regularly installed software, or through their 100% web-based client. You can verify your installed client works fine using this test.

• Advanced TypeScript courses require some prior installation on your computer: instructions can be found here.

Registration & deadlines

Regardless of the modalities you’re looking for (single- or multi-client, in-room or remote), your initial request (for quotation or contract) should be made online from the training’s web page. You can find further up contract request links for every available multi-client session, a proposal request button for a single-client session, and for any other enquiry can use the contact button further below. Please favor our online forms as they speed up processing by avoiding numerous e-mail back-and-forths in order for us to get all your necessary information.

For multi-client, fixed-date sessions, we reply to quotation or contract requests within at most 2 business days (and usually within minutes). For single-client, custom sessions, we usually get back to you within 3 business days to fine-tune your requirements and create a bespoke offer.

The e-mails we send to provide quotations or contracts, as well as our online training pages, provide a link to an online survey prospective trainees can use for fit-for-needs assessment; this information should get to us ASAP, ideally before contract signing, so we can verify our training offer is a good match for the audience.

Summons are sent by e-mail no later than 7 days prior to the session, at which time a potential cancellation decision (usually because two few trainees registered) is made. If the session is guaranteed ahead of that deadline, we can send your summons earlier at your request.

For multi-client sessions, you can register online (requesting a contract and sending it back signed by e-mail) until the day before the session starts, provided the required amount of seats remain free. If you finalize your registration after the usual summons-sending deadline, your summons are sent immediately by e-mail.

However, when French nationals contractualize with us in their personal capacity, French law mandates a withdrawal period (10 calendar days for in-room sessions, 14 calendar days for online sessions). In order to allow such clients to register later than this, they are provided an opt-in choice in their contract request online form to waive their withdrawal rights if the schedule requires it.

For French client entities applying for third-party financing (e.g. OPCOs, Pôle Emploi, Regions, EU), it is imperative that financing agreements be sent to Delicious Insights no later than the last day of the training session. Should financing be denied or only partially provisioned, the client is liable for payment of the balance of the fee.

You can find more information on the details of registration, cancelling and getting refunds in our Terms of Sale.

Disabilities & special needs

The French law dated September 5, 2018 for “freedom to choose one’s professional future” aims to facilitate accessing and retaining a job for people with disabilities or special needs.

Delicious Insights is very keen to help everyone, regardless of their particulars, move forward professionally.

We can often adapt the modalities of our trainings to fit your needs: let’s just review your situation together.

Do feel free to get in touch with our point person for Disabilities, Christophe Porteneuve, by e-mail or phone.

Do feel free to get in touch with our point person for Disabilities, Christophe Porteneuve, by e-mail at handicap@delicious-insights.com or phone at +33 662 059 656.