URLSearchParams in JavaScript - Constructing Query Strings

The very convenient URLSearchParams object within JavaScript lets you easily work with query strings - it provides methods to add, remove and retrieve key value pairs and most importantly, extract an encoded query string for further use.
This object is a relief for traditional JavaScript developers who know the pain of using regular expressions to extract query string data or manual string construction to create a query string. URLSearchParams does all this for you through its very helpful methods.
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