URLSearchParams.prototype.keys - Node documentation
method URLSearchParams.prototype.keys

Usage in Deno

import { URLSearchParams } from "node:url";
URLSearchParams.prototype.keys(): IterableIterator<string>

Returns an ES6 Iterator over the names of each name-value pair.

const params = new URLSearchParams('foo=bar&#x26;foo=baz');
for (const name of params.keys()) {
  console.log(name);
}
// Prints:
//   foo
//   foo

Return Type

IterableIterator<string>