Simple example usage: https://perchance.org/url-params-plugin-example?blah=abc123

It's really simple:

url = {import:url-params-plugin}

output
  [url.blah] // this will output 'abc124' if URL has '?blah=abc123' on the end

This plugin allows you to, for example, have several "different" generators within the same generator page, where each sub-generator has its own URL. Or to just adapt the output of your generators based on the URL. E.g. you might have an English and a French version of your generator with URLs like this:

• https://perchance.org/my-cool-gen?lang=en
• https://perchance.org/my-cool-gen?lang=fr

In that case, within your code you can use [url.lang] to determine which language the user is viewing, and adjust your list selection/odds/etc. based on that.

You can also use it to e.g. link directly to a particular seed for the seeder plugin, and stuff like that.

(Note for experienced Perchance users: The old document.referrer hack is no longer required since Perchance now copies all parameters over to the iframe when initializing it)