JSFiddle - React, Tailwind, and code Playground
by charaf11
HTML
<div id="myDiv">
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</div>
CSS
#myDiv{width:200px;height:200px;text-align:justify;margin:0 auto;}
.open{background-color:red;}
JavaScript
containOpen();//before clicking value=2
$("#myDiv").click(function(){
$(this).addClass("open");
containOpen();//after click , value=1
});
function containOpen(){
if ($('#myDiv.open').length==1){
var myValue = "1";
}else{
var myValue = "2";
}
alert("value = "+myValue);
}