jquery - Change class of Panel right before the click -

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how can change class before animation starts/open/close panel? class changes after animation/panel opened or closed.

example: http://jsfiddle.net/0b9jppve/

actual code:

$('#accordion').find('.panel-default:has(".in")').addclass('panel-danger');  $('#accordion').on('shown.bs.collapse', function (e) {    $(e.target).closest('.panel-default').addclass(' panel-danger'); }).on('hidden.bs.collapse', function (e) {    $(e.target).closest('.panel-default').removeclass(' panel-danger'); })

all need change events you're listening for. events hide.bs.collapse , show.bs.collapse fire when animation starts, hidden.bs.collapse , shown.bs.collapse fire on completion.

$('#accordion').on('show.bs.collapse', function (e) {    $(e.target).closest('.panel-default').addclass(' panel-danger'); }).on('hide.bs.collapse', function (e) {    $(e.target).closest('.panel-default').removeclass(' panel-danger'); })

see updated fiddle


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