Complexity grows when a straightforward implementation must accommodate more conditions and interactions. A radio group that once accepted simple options can still work after gaining icons, popularity indicators, charges, and selection-dependent details—but its option data and rendering logic become harder to scan. “Complexity always increases” is a useful warning, not a reason to reject features: watch where each new requirement makes the code harder to understand or change. section 2.2.2
{
label: "Bacon", #1
value: "bacon", #2
isPopular: true, #3
icon: "
", #4
postfix: "(+ $0.99)", #5
details: <span>Details</span>, #6
}
This option object shows how one choice accumulates display properties alongside its label and value. The shape is manageable in isolation; the cost emerges when many options and conditional rendering paths must be maintained together. section 2.2.2
Judge complexity by the work it creates, not by a single count:
- In a component, check whether the data setup and conditional JSX remain easy to follow as features accumulate. section 2.2.2
- In styling, check whether developers can locate rules, debug an unexpected appearance, and make changes without working around the chosen solution. Colocation helps; too many moving parts can invite misconfiguration. section 7.1.2
- In a team, account for coordination. One central CSS file may suit a small site but create difficult pull requests when many developers edit a very large file. section 7.1.2
- With TypeScript, weigh extra code, learning time, and slower initial writing against fewer errors and better guidance in an unfamiliar codebase. Delay adoption if the upfront investment is not feasible. section 6.3
Choose a manageable project scope
An expense tracker offers three complexity levels: build the whole application from a skeleton, add a data layer to a finished but static frontend, or build the frontend over a working backend. Selecting a level changes how many parts must be built and integrated; it does not make complexity disappear. section 12.1.1
There is no numeric complexity score here. The practical decision is whether the added behavior, tooling, or project scope earns its cost in readability, maintenance, and team effort. section 2.2.2 section 7.1.2
