What's the idiomatic way to write a reusable (pagination) script?

[DanKaplanSES]

I want to write a script that adds keyboard shortcuts to websites that have pagination. i.e., a website with a UI like this (everything between the |s is a button):

| < | 1 | 2 | 3 | ... | 52 | 53 | 54 | > |

If I press the left key, I want to click the < button. If I press the right key, it clicks the > button. This is straightforward for any one site, but I don't want to be copying and pasting it for every additional site. My question is, how do I avoid that?

Right now, my script look something like this:

// ==UserScript==
// @name         Previous/Next buttons
// @namespace    http://tampermonkey.net/
// @version      0.1
// @match        https://www.example1.com/*
// @match        https://www.example2.com/*
// @match        https://www.example3.com/*

...
// docs: addPreviousNextListener(urlString, previousButtonSelector, nextButtonSelector);
addPreviousNextListener("https://www.example1.com/.*", ".pagination.prev", ".pagination.next");
addPreviousNextListener("https://www.example2.com/.*", ".page-pagination.prev", ".page-pagination.next");
addPreviousNextListener("https://www.example3.com/.*", "#prev", "#next");

This does a decent job, but it still bothers me that I have to add every site twice, once for the @match, and again in the addPreviousNextListener. I could modify the @match to match * (I think?), but that feels wrong and maybe like a security vulnerability? But is that the only way to reduce this duplication further? Ideally, adding a new website to the script would be a one line change. Is that possible? How would it be done?

[utahcon]

I would let a try/catch handle the heavy lifting for me.

// ==UserScript==
// @name         Previous/Next buttons
// @namespace    http://tampermonkey.net/
// @version      0.1
// @match        https://www.example1.com/*
// @match        https://www.example2.com/*
// @match        https://www.example3.com/*

(function() {
    'use strict';

    let knownMarkers = {
        "next": [".pagination.next", ".page-pagination.next", "#prev"],
        "prev": [".pagination.prev", ".page-pagination.prev", "#next"]
    }

    // handle next
    for (let marker of knownMarkers["next"]){
        try {
            // Your logic here
        } catch (error){
            // pass
        }
    }

    // handle next
    for (let marker of knownMarkers["prev"]){
        try {
            // Your logic here
        } catch (error){
            // pass
        }
    }
})();