how to know if a click happend on in element or outside code example

Example 1: javascript detect click outside element

var ignoreClickOnMeElement = document.getElementById('someElementID');

document.addEventListener('click', function(event) {
    var isClickInsideElement = ignoreClickOnMeElement.contains(event.target);
    if (!isClickInsideElement) {
        //Do something click is outside specified element
    }
});

Example 2: check if outside the div is clicked

$(document).mouseup(function(e) 
{
    var container = $("YOUR CONTAINER SELECTOR");

    // if the target of the click isn't the container nor a descendant of the container
    if (!container.is(e.target) && container.has(e.target).length === 0) 
    {
        container.hide();
    }
});