javascript - Keypress event listener not working -


i'm having hard time trying understand how javascript events works. have until now:

$ ->  masks = document.queryselectorall('[data-mask]')   in masks   i.addeventlistener("keypress", (e) -> onlynumber(e) )   mask = i.getattribute("data-mask")    switch (mask)    when "cep" i.addeventlistener("keypress", -> cep(this)); i.setattribute("maxlength", "9")    cep = (input) ->      input.value = input.value + "-" if input.value.length == 5 , input.charcode != 8 # backspace  onlynumber = (event) ->  event.preventdefault() if event.charcode > 0 , (event.charcode < 48 || event.charcode > 57 )

what need correct line:

input.value = input.value + "-" if input.value.length == 5 , input.charcode != 8 # backspace

i think event added inside switch block may not able answer key pressed, i'm not sure if can solve problem way. besides conditional in code:

input.charcode != 8 # backspace

the rest working!

edit1: documentação .keypress "the keypress event sent element when browser registers keyboard input. similar keydown event, except modifier , non-printing keys such shift, esc, , delete trigger keydown events not keypress events. other differences between 2 events may arise depending on platform , browser." it's seems should use keydown event recognize backspace key.


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