Greasy Fork

Did I mismatch the parenthesis on the regexp or did the browser throws a false-positive error saying there is a mismatch of parenthesis? I'm working on a code to automate getting github links to download a version of a software in the tags section. Visit this link: https://github.com/adam-p/go/tags?after=go1.18beta1 and have this script running and an error will appear saying the regex is having mismatch parenthesis even though it looks fine. This is supposed to be an autoclick-next button at every N milliseconds.

// ==UserScript==
// @name         Github release tag next-er
// @namespace    any site
// @version      0.2
// @description  Auto-clicks next
// @include      https://github.com/*/*/tags/*
// @grant        none
// ==/UserScript==

(function() {
	//settings
		const Github_AutoNext_IntervalNext = 500
			//^Number of milliseconds between each click of the next button
		const Github_UsernamePart = "(?:(?!(?:about|codespaces|collections|contact|customer\\-stories|enterprise|features|git\\-guides|images|login|mobile|organizations|orgs|premium-support|pricing|readme|search|security|signup|sitemap|solutions|sponsors|team|topics|trending|users))[A-Za-z0-9\\-]+)"
	//Not to touch unless you know what you're doing
		let RaceConditionLock = false
			//^This prevents concurrent runs of the code as a failsafe.
	//Main code
		window.onload = setInterval(MainCode, Github_AutoNext_IntervalNext)
	
	
		function MainCode() {
			if (!RaceConditionLock) {
				RaceConditionLock = true
				
				let ArrayOfAHref = Array.from(document.getElementsByTagName("a"))
				let NextButton = ArrayOfAHref.find((HTMLElement) => {
					if (HTMLElement.hasAttribute("href")) {
						if (RegExp("^https:\\/\\/github\\.com\\" + Github_UsernamePart + "\\/[A-Za-z0-9_.\\-]+\\/tags\\?after").test(HTMLElement.href)) {
							return true
						}
					} else {
						return false
					}
				})
				NextButton.click()
				RaceConditionLock = false
			}
		}
})();

Nevermind, I found the culprit why the regex popped: "^https:\\/\\/github\\.com\\" is supposed to be "^https:\\/\\/github\\.com\\/" Notice I'm missing a foward slash character. Also, other code is wrong, correct:

// ==UserScript==
// @name         Github release tag next-er
// @namespace    any site
// @version      0.2
// @description  Auto-clicks next
// @include      https://github.com/*
// @grant        none
// ==/UserScript==

(function() {
	//settings
		const Github_AutoNext_IntervalNext = 1000
			//^Number of milliseconds between each click of the next button
		const Github_UsernamePart = "(?:(?!(?:about|codespaces|collections|contact|customer\\-stories|enterprise|features|git\\-guides|images|login|mobile|organizations|orgs|premium-support|pricing|readme|search|security|signup|sitemap|solutions|sponsors|team|topics|trending|users))[A-Za-z0-9\\-]+)"
	//Not to touch unless you know what you're doing
		let RaceConditionLock = false
			//^This prevents concurrent runs of the code as a failsafe.
	//Main code
		window.onload = setInterval(MainCode, Github_AutoNext_IntervalNext)
	
	
		function MainCode() {
			if (!RaceConditionLock) {
				RaceConditionLock = true
				
				let ArrayOfAHref = Array.from(document.getElementsByTagName("a"))
				let NextButton = ArrayOfAHref.find((HTMLElement) => {
					if (HTMLElement.hasAttribute("href")) {
						if (RegExp("^https:\\/\\/github\\.com\\/" + Github_UsernamePart + "\\/[A-Za-z0-9_.\\-]+\\/tags\\?after=").test(HTMLElement.href) && HTMLElement.innerText == "Next") {
							return true
						}
					} else {
						return false
					}
				})
				NextButton.click()
				RaceConditionLock = false
			}
		}
})();

new RegExp(`^https://github\\.com/${Github_UsernamePart}/[A-Za-z0-9_.-]+/tags\\?after=`)

You can test in https://www.regextester.com/