TypeScript Website Development
Mistakes caught while we write, not by your visitors.
LGTCS writes every website in TypeScript, so whole classes of bugs are caught before the code is ever built, and the next developer inherits readable code.
Fixed-price packages from $300. No retainer, no licence fees.
Short answer
TypeScript is JavaScript with types added. It checks that the code makes sense before the site is built, so a misspelled field name or a missing value is caught on a developer's screen instead of on a live donation form. LGTCS writes every project in TypeScript and runs the check on every change, so nothing reaches your site without passing it. The types also describe the code, which is why a developer who has never seen your project can still work on it safely.
typescriptlang.org- Errors caught ahead of deployment
- Before buildErrors caught ahead of deployment
- Type check runs before anything ships
- Every changeType check runs before anything ships
- Types describe how the code fits together
- Self-documentingTypes describe how the code fits together
What TypeScript actually is
JavaScript runs the web, and it is forgiving to a fault. It will happily let you read a field that does not exist, pass text where a number was expected, or forget that a value might be missing. Nothing complains. The site builds, deploys, and then breaks in front of a visitor on the one page nobody tested.
TypeScript adds types to that same language. A type says what a thing is: this is a number, this is a list of donation tiers, this value might be missing so you have to handle that. The check runs while the code is being written, and the editor highlights the mistake in the moment. It is the difference between a spell-checker underlining a word as you type and finding the typo after the leaflet has been printed.
Nothing about TypeScript reaches your visitors. The types are removed when the site is built, so the code that runs in the browser is ordinary JavaScript and there is no size or speed cost. What you get is fewer bugs in production and code that explains itself to whoever opens it in two years.
Typed code versus plain JavaScript
Both produce the same website. The difference is where the mistakes get found, and how much of the project sits only in the original developer's head.
| Aspect | TypeScript | Plain JavaScript |
|---|---|---|
| Where errors surface | On the developer's screen | In the browser, often a visitor's |
| Renaming something across the site | Checked everywhere automatically | Find and replace, then hope |
| Missing or empty values | Must be handled explicitly | Crashes when it happens |
| Understanding unfamiliar code | Types state what is expected | Read it all and infer |
| Editor help | Accurate autocomplete and warnings | Guesswork |
| Writing speed | Slightly slower to write | Quicker up front |
The last row is a genuine trade-off. TypeScript takes a little longer to write, and on a throwaway script that is not worth paying. On a website that has to keep working for years and be handed to other people, the cost is repaid the first time a rename touches thirty files and nothing breaks.
How LGTCS uses TypeScript on client projects
Specific decisions we make on real builds, not a feature list copied from the documentation.
Content shapes are defined once
Pages, services, pricing tiers and FAQs each have a defined shape. Add a new entry that is missing a required field and the build stops with the file and line, rather than publishing a page with an empty heading.
Form and payment data is validated at the edge of the system
Anything arriving from a visitor or a third-party service is checked against an expected shape before it is used. A donation amount that arrives as text does not quietly become a broken charge.
Component props are explicit
Every component states what it needs and what is optional. Using one incorrectly is an error while writing, not a visual defect discovered after launch.
Missing values must be dealt with
TypeScript is configured in strict mode, which means a value that might be absent cannot be used until the absent case is handled. This removes the most common runtime crash on the web in one setting.
Integrations carry their own types
Stripe, Cloudflare and the CMS publish typed interfaces. Calling them incorrectly fails during development rather than returning an error at checkout.
The check runs on every change
The type check is part of the build. A change that does not pass cannot be deployed, so the rule is enforced by the pipeline rather than by someone remembering.
Thinking about a TypeScript build?
Send us the pages you need and your deadline. We will tell you which package covers it and what it costs, usually the same day.
How a TypeScript project runs, step by step
The same sequence on every project, whether it is a single landing page or a full platform.
- 1
Model the content first
Before pages are built, we define the shapes: what a service is, what a pricing tier contains, what a case study needs. Getting this right early prevents inconsistency later.
- 2
Turn strict mode on from the start
Strict checks are enabled on day one. Retrofitting them onto a finished project is painful, which is why projects that postpone it usually never do it.
- 3
Type the boundaries
Form submissions, API responses and webhook payloads are validated where they enter the system, so untrusted data never travels far in an unknown shape.
- 4
Let types be the documentation
Clear type names and small definitions explain intent better than comments, and unlike comments they cannot drift out of date without the build failing.
- 5
Check on every commit
The type check runs before the site is built. Failing code cannot reach the live site, regardless of who wrote it or when.
- 6
Hand over a project that stays checked
The configuration is part of the repository, so the next developer inherits the same guardrails rather than an unenforced convention.
What you receive
Everything below is handed over at the end of the project. Nothing is held back as leverage to keep you on a retainer.
- TypeScript across the entire project, with no untyped escape hatches
- Strict mode enabled, including checks for missing values
- Defined shapes for all site content and page data
- Typed component props with required and optional fields marked
- Validated form, payment and webhook data at the system boundary
- Typed integrations for Stripe, Cloudflare and the CMS
- Type checking enforced in the build pipeline
- Editor configuration so the checks work on any machine
- Zero runtime cost, since types are removed at build time
- Documented types the next developer can read
Projects we build with TypeScript
The kinds of work this part of the stack is genuinely the right answer for.
Sites handling money
Donation and payment flows are where an unnoticed mistake costs real money. Typed amounts, currencies and states remove a category of failure from that path.
Projects with a long life
Code you return to after a year is code you have forgotten. Types tell you what it expects without reading the whole file.
More than one developer
Types are a contract between people. They prevent two developers making different assumptions about the same piece of data.
Sites with structured content
Anywhere entries are repeated, such as services, team members or case studies, one defined shape keeps every entry complete and consistent.
The business reason we chose it
Technology decisions only matter if they change something you can measure.
Fewer bugs reach visitors
The most common runtime errors on the web become build failures, which means they are found by us rather than by your audience.
Changes are safer later
Renaming or restructuring is checked across the whole project at once, so maintenance stays affordable as the site grows.
Handover is easier
A new developer reads the types to understand the system, instead of asking us or guessing.
In our packages
Used on every package, from Launch upward. Strict mode and build-time type checking are standard on all projects.
See all four packages side by sideTypeScript questions we get asked
The things clients actually ask before signing, answered plainly.
Does TypeScript make my website slower?
No. Types are removed when the site is built, so what reaches the browser is ordinary JavaScript with no extra weight and no extra work at runtime. The only cost is a few seconds during the build, on our machines rather than your visitors'.
Does using TypeScript make the project more expensive?
Marginally more time to write, noticeably less time to fix, which is why LGTCS uses it on every package including the smallest. The saving is not theoretical. Bugs found during a build cost minutes. The same bug found by a donor on a live payment page costs an emergency fix and a lost donation.
Do I need to understand TypeScript to own the site?
No. It affects how the code is written, not how you use your website. Editing content, publishing pages and reviewing changes work exactly the same. Its value to you is that fewer things break and the next developer can understand the project quickly.
Can you convert my existing JavaScript site to TypeScript?
Yes, and it can be done gradually rather than as one risky rewrite, because TypeScript and JavaScript run side by side in the same project. LGTCS usually starts with the parts that handle money or user data, since that is where the return is highest. Send LGTCS your repository and we will tell you what converting it would involve and whether it is worth doing on your project.
Is TypeScript still worth it on a small site?
Yes, for a reason that has little to do with size. Small sites are the ones most likely to be edited a year later by somebody who did not build them, with no budget for a careful review. Types are what make that edit safe. LGTCS writes every package in TypeScript for exactly that reason.
Does TypeScript help with search rankings?
Not directly. Search engines never see it. The indirect effect is real though: fewer broken pages, fewer failed forms and fewer errors mean a site that stays healthy, and search engines do notice pages that break or disappear.
What happens if a change fails the type check?
It does not deploy. The type check runs as part of the build, so a change that does not pass stops there and your live site keeps serving the previous working version. Nothing partially broken reaches visitors while it is being fixed.
The rest of the stack
Every tool we use has to work with the others. These are the closest neighbours.
Ready to build on TypeScript?
Tell us what the website needs to do. We will tell you which package covers it, what it costs, and when it goes live.