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HTML 5 Form Verification Issue | Missing information alert bubble doesn't stick to failing field

  • 4 replies
  • 1 has this problem
  • Last reply by jscher2000

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As the subject line reads, I am experiencing the alert bubble not sticking to the failing input field while building a site using HTML5 and testing it on FireFox v78.0.2 (64-bit). Specifically, when I submit the form while leaving an input field empty, the browser will catch the required field as being empty and will stick the alert bubble to the field; however, when you scroll away from the failing field, the bubble does not stick to the field, but sticks instead to the top of the browser window.

I am using simple "required" tags for input fields in the form. On every other browser I have tried (Chrome, Edge, Brave) this issue does not exist.

Thanks for any help that you can provide.

All Replies (4)

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Hi David, I can see the problem occurs with the example on MDN as well:

I don't know whether there is already a bug on file for this but if you start filing a new one, the site will check that:

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It seems to be a case of this bug:

[e10s] HTML5 validation popup doesn't close when the form element scrolls

I would say not to expect a fix in the next several months as it has only an average priority and severity ranking. Sorry about that.

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This does appear to be the bug. Looks like we will be exploring other form validation methods in the meantime. Thanks for the reply.

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You might explore using :invalid.

In addition to field coloring, if you have hints next to your fields, you could use a sibling selector to toggle them:

  input:invalid ~ .hint {
      display: inline;
  input:valid ~ .hint {
      display: none;