JQuery simplemodal autoposition fails when focused on a textbox in webkit -

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i'm using simplemodal 1.4.4 , has strange behavior when open page on ipad.

the modal has autoposition set true. when loads, shows modal centered successfully.

inside modal, have textboxes user , password. when focused on user textbox, virtual keyboard opens, shrinking viewport, modal continues on position, , that's ok.

actually, problem when type something. strange behavior occurs, modal "moves" pixels up. , textbox becomes hidden.

i found common behavior, if scroll page see texbox hidden, clear texbox , enter new value, moves or down "same" amount of pixels scroll i've made.

summing up: looks autopositioning modal every time enter value on textbox, , calculation based on scroll made:

  • if make small scroll, , enter new value on textbox, popup moves little.
  • if make long scroll, , enter new value on textbox, popup moves far away.

if disable autoposition, doesn't happen, popup becomes invisible due css values has default.

my options are:

  • to disable autoposition, set position:relative on popup-container , change popup margins center on screen
  • to find possible workaround using autoposition.

i'm willing use second approach, need investigate further or know if has had kind of behavior , difficulty.

thanks in advance!

use "fixed" option:

$(element).modal({fixed: false}); proof - https://code.google.com/p/simplemodal/issues/detail?id=80

my code

 $.modal(data, {                         minwidth: 350,                         maxwidth: 400,                         maxheight: 450,                         autoresize: false,                         overlayclose: false,                         fixed: false,                         opacity: 80,                         onshow: runpopup                     });

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