How Can I Efficiently Encode a JavaScript Object into a Query String?

Efficient JavaScript Object Encoding for Query Strings

Encoding a JavaScript object into a string for transmission via GET requests can be a tedious task. Thankfully, there's a straightforward JavaScript solution that doesn't rely on third-party libraries or jQuery.

Here's how you can do it:

serialize = function(obj) {
  var str = [];
  for (var p in obj)
    if (obj.hasOwnProperty(p)) {
      str.push(encodeURIComponent(p) + "=" + encodeURIComponent(obj[p]));
    }
  return str.join("&");
}

This function takes a JavaScript object as input and returns an encoded string. The encoding process involves:

• Iterating over the object's properties
• URL-encoding both the property name and value
• Concatenating the encoded pairs with an ampersand (&) separator

To illustrate, consider encoding the following object:

{
  foo: "hi there",
  bar: "100%"
}

Using the serialize function:

console.log(serialize({
  foo: "hi there",
  bar: "100%"
}));

Will output the following encoded string:

foo=hi%20there&bar=100%25

This encoded string can then be passed as a query string in a GET request without any hassle.

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