As a 1password user, I usually have very long, unique, and random
passwords for every site that requires one. I use the 1Password browser
extensions to fill password forms for me, but on iOS I copy and paste the
values manually. Some misguided web developers have decided pasting
passwords should be prohibited and have added
onpaste events to prevent
it. The latest culprit I have encountered is Apple.
While this is an infrequent annoyance it can be crippling. To combat it, I
onpaste events from all password fields.
To use the bookmarklet, drag the allow pwpaste bookmarklet link to your bookmark toolbar. When you encounter one of these annoying forms, simply click the bookmark to re-enable pasting. The bookmarklet source is available in a more readable format below.
Adding bookmarkelts to mobile safari is a giant pain, so I would suggest adding the bookmarklet in desktop Safari and using iCloud to sync it.