Understanding Query String Parameters in URLs
A query string parameter is an essential tool in web development that allows additional information to be passed to the server through the URL. It is also used as a way to pass information to enhance the user experience by customizing the content as per URL parameters or track the marketing campaigns. It starts after a question mark (?)
and consists of key-value pairs that customize the request.
https://northpoll.app/?query=tools&category=free
query=tools
and category=free
are query string parameters which are separated by an ampersand (&)
. Here NorthPoll is using these parameters to show tools related to free category. The server decodes these parameters and customizes the content as per the parameters.The reason why query string parameters are widely used is their simplicity. However, there are a number of challenges also associated with this. For example, exposing sensitive data. Developers need to ensure that they don’t reveal sensitive information in the process like passwords etc. Another challenge is the encoding of special characters. Special characters and spaces need to be URL-encoded before use.
Also, there are certain limitations on the length of the query strings by browsers and servers. There is no exact limit, so it is recommended to use 3000 characters or less in the query string parameters.