javascript - How can I validate a field client-side using HTML5 that is read only? -

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i have input field launches datepicker. make work on mobile device, i've made field read only. means can launch date picker on click (or tap) using jquery, , tap doesn't open keyboard on mobile device.

however - readonly attribute bypasses html5 validation mechanisms. can add either mimics html5 validation , feel, keep consistency, or forces html5 validation despite field being readonly?

edit: i'm looking validating field filled in (required) , preferably fits date format.

readonly fields cannot have required attribute, contain value.

look @ html5 standard drafts


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