createSearchParams

Creates a URLSearchParams object using the given initializer.

This is identical to new URLSearchParams(init) except it also supports arrays as values in the object form of the initializer instead of just strings. This is convenient when you need multiple values for a given key, but don't want to use an array initializer.

For example, instead of:

let searchParams = new URLSearchParams([ ['sort', 'name'], ['sort', 'price'] ]);

you can do:

let searchParams = createSearchParams({ sort: ['name', 'price'] });