Learning JavaScript by Breaking Things
There’s a particular kind of confidence you get from writing code that works.
Then there’s the much more useful kind you get from writing code that doesn’t work — and figuring out why.
That’s where I am right now.
My journey at Zone01 Kisumu has increasingly become less about learning syntax and more about learning how to think like a developer.
And the current Piscine JavaScript phase has been making that very obvious.
JavaScript has a way of humbling you
A task can look ridiculously simple:
“Write a function that does X.”
You write it.
You run the tests.
It fails.
You stare at the code.
You swear the code is correct.
You run it again.
It fails in a completely different way.
Eventually, you discover that the problem wasn't the function itself. Maybe it was how you handled an edge case. Maybe you misunderstood what the test expected. Maybe your assumptions about JavaScript were simply wrong.
And that's the interesting part.
I'm starting to realize that programming isn't primarily about knowing what to type.
It's about developing the ability to ask:
What exactly is happening here?
The small things are teaching me a lot
We've been working with concepts like:
- ES modules
- Higher-order functions
- Promises and asynchronous JavaScript
- Error handling
- Timeouts and retries
- File manipulation
- HTTP servers
- JSON
- Basic authentication
- Objects and functions
- Testing and debugging
None of these concepts are particularly mysterious on their own.
The challenge is putting them together and making them behave exactly as expected.
A test failing because a URL contains hello+world instead of hello%20world can teach you more about how a system actually works than reading ten pages of documentation.
At least, that's how it feels sometimes. 😅
I'm learning to stop guessing
One of the biggest changes I've noticed in myself is how I approach errors.
Earlier, an error message could feel like something standing between me and the solution.
Now I try to treat it as evidence.
If something says:
ReferenceError: something is not defined
the useful question isn't:
“Why is JavaScript being annoying?”
It's:
“Where is this value supposed to come from, and what assumption did I make about its scope?”
That shift sounds small.
It isn't.
It's changing how I debug.
The goal isn't to memorize JavaScript
There are far too many methods, APIs, quirks, and edge cases to memorize everything.
What matters more is becoming comfortable navigating unfamiliar problems.
Read the error.
Inspect the code.
Check the documentation.
Write a smaller test.
Make a hypothesis.
Test it.
Break it again.
Repeat.
That's becoming the real curriculum.
From “I know this” to “I can figure this out”
I think that's one of the most valuable things Zone01 has been teaching me.
There's a difference between saying:
“I know JavaScript.”
and saying:
“Give me a JavaScript problem and I'll figure it out.”
I'm much more interested in becoming the second person.
There are still plenty of moments where I get stuck.
There are still bugs that make absolutely no sense for the first 30 minutes.
There are still tests that seem personally offended by my code.
But I'm getting better at staying with the problem.
And maybe that's the point.
Not becoming someone who never gets stuck.
Becoming someone who knows what to do when they are stuck.
Still learning. Still debugging. Still breaking things.
And, hopefully, getting a little better every day.
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