How to toggle prepend in jquery -

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i want toggle css link using jquery, via single button.

catch is, want in target of iframe.

so far have following code, insets link fine:

$("#custom").click(function() {     $("#content").contents().find("head").prepend("<link href=\"../build/css/custom.css\" rel=\"stylesheet\" id=\"custom-css\">"); });

this activated following html:

<div class="toggle-custom"> <a target="custom" id="custom" class="btn btn-primary btn-lg">toggle custom style</a> </div> <iframe id="content" src="carousel.html" frameborder="0" scrolling="auto"> </iframe>

i know way remove is:

$("#content").contents().find("#custom-css").remove();

but how can toggle same button?

thanks

try

var contents = $("#content").contents(); var ccss = contents.find("head").find("#custom-css"); if(ccss.length){     ccss.remove() } else {     contents.find("head").prepend("<link href=\"../build/css/custom.css\" rel=\"stylesheet\" id=\"custom-css\">"); }

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