javascript - Easiest way to mask characters in HTML(5) text input -


does html5 have kind of text field masking or still have trap onkeydown etc.?

jbabey right--"masking" in blocking illegal characters, not hiding what's typed.

the best (as in simplest , reliable) way i've found trap onkeyup , run regex replace on value of textfield, removing illegal characters.

this has few advantages:

  1. it's easy implement (one function, 2 lines of code).
  2. it's reliable , covers cases i've thought of.
  3. it doesn't block key commands copy/paste, select or arrow keys.

but major disadvantage shows typed character(s) briefly before removing them, makes hackish , unprofessional.

look new html5 input types. these instruct browsers perform client-side filtering of data, implementation incomplete across different browsers. pattern attribute regex-style filtering, but, again, browsers don't (or @ all) support it.

however, these won't block input itself, prevent submitting form invalid data. you'll still need trap onkeydown event block key input before displays on screen.


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