This is not something I use everyday. Seems more like a once a year thing. Last time I needed to extract query string variables, I used the old school approach with a regular expression. Now that I need to do this again, I can use the new school approach: URLSearchParams.
The URLSearchParams (at the time of writing) is not yet standardized in the W3C; however, most modern browsers recognize it. I’ve also got a version of this for how-to Access query string parameters with Express and Node.js.