Question

How to convert URL Parameters to JSON in JavaScript

Answer 1

function queryToJson(urlOrQuery) {
    // If it's a full URL, extract only the query part
    let query = urlOrQuery;

    try {
        const url = new URL(urlOrQuery);
        query = url.search; // includes leading "?"
    } catch {
        // Not a full URL — treat as raw query string
    }

    const params = new URLSearchParams(query);
  
    return Object.fromEntries(params.entries());
}

console.log(queryToJson("https://example.com/?name=aaa&age=30&city=bbbb")); 
console.log(queryToJson("?a=1&b=bbbb&c=3.14")); 



/*
run:

{ name: 'aaa', age: '30', city: 'bbbb' }
{ a: '1', b: 'bbbb', c: '3.14' }

*/

 

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