Unwatch multiple repositories at once in GiHub

unwatch-repos.js

/* USAGE
   Go to https://github.com/watching
   Paste this function in the console
   e.g. unwatchRepos("rails|node|go")
   That unwatches repos containing rails, node or go in the repo link.
*/

var unwatchRepos = (pattern) => {
 var list = document.getElementsByClassName('repo-list')[0]
 var rows = list.getElementsByClassName('js-subscription-row')

 for(var i = 0; i < rows.length; i++) {
   var row = rows[i]
   var link = row.getElementsByTagName('a')[0]
   if(RegExp(pattern).test(link.href)) {
     row.getElementsByClassName('btn-sm')[0].click()
   }
 }
}

Found this Gist following the github onboarding guide while going through new hire onboarding. Github must have changed some of ids on their watching page since this was written so the script no longer works for me.
I took the liberty of modifying it for my usecase and am sharing the modified version here:

An important note, I have changed the pattern that unwatchRepos takes in from a language based pattern to a repo named pattern so unwatchReposExcept("android-instant") will unwatch everything except "android-instant".

var unwatchReposExcept = (pattern) => {
 var list = document.getElementsByClassName('repo-list')[0]
 var rows = list.getElementsByClassName('Box-row')

 for(var i = 0; i < rows.length; i++) {
   var row = rows[i]
   var notification_button = row.getElementsByTagName('notifications-list-subscription-form')[0]
   var link = row.getElementsByTagName('a')[0]
   if(!RegExp(pattern).test(link.href)) {
     notification_button.click()
     row.getElementsByClassName("SelectMenu-item flex-items-start").item(2).click()
   }
 }
}