Use URLSearchParams for query strings

Build and read query strings with the platform API instead of fragile string joins.

Code example

Copy, adapt, and ship.

Read the numbered lines, copy the complete snippet, then adjust the values for your project.

JavaScript snippet

01const params = new URLSearchParams();02params.set("topic", "JavaScript");03params.set("level", "Intermediate");04 05const href = `/pro-tips?${params.toString()}`;

Production-ready starting point5 lines · copy with one click

Why this matters

The production reason.

01
Manual query strings break easily when values contain spaces, ampersands, or optional filters.
02
URLSearchParams handles encoding, appending, replacing, and reading values with a native API.
03
It also makes shared URLs clearer for search pages, filters, and analytics links.

Platform notes03

How it holds up outside a demo.

JavaScriptUse URLSearchParams instead of hand-built '?a=' strings.
Next.jsPair it with useSearchParams for client-side filter UI.
SEOKeep important filtered pages on clean routes when they deserve indexing.

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