Never allow the user to delete something without validation.
People misclick all the time, and losing information forever hurts and creates a bad memory related to your product!
Make sure your UI supports (inline or popup) deletion validation.
Even the undo functionality is useful in these scenarios, although it's impossible sometimes due to engineering restrictions.
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I love these little tips. It’s like Dribbble but actually useful.
CEO of Iconfinder
I love UX & UI tips. Especially, when they are practical and presented in a very good way. Yours are meeting both criteria.
Head of Marketing at Abstract