javascript - addClass() not working -

-

i have bootstrap button

<button onclick="leaveopen()">test</button>

it calls custom function

function leaveopen(){   $("#rangedropdown").addclass('open');   $("#dropdownmenu2").trigger('focus').attr('aria-expanded', 'true'); }(jquery);

which should affect these elements

<div class="dropup mobilewidth mobilebottom" id="rangedropdown">   <button class="btn btn-default dropdown-toggle mobilewidth" type="button" id="dropdownmenu2" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">    ...   </button> ... </div>

this part works

$("#dropdownmenu2").trigger('focus').attr('aria-expanded', 'true');

but part doesn't

$("#rangedropdown").addclass('open');

when click the test button, "dropup mobilewidth mobilebottom" lights in chrome developer tool if changed, 'open' class not added. doing wrong?

it's issue class added & it's removed.

probably bootstrap watches on focus event , toggles open class. if handler before bootstrap:

  • you: open added

  • bootstrap: open toggled

-> result: nothing changes

in other case class added, looking @ description chrome dev tools flashes changed it's rather issue of double changing open class


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