jQuery vérifie si l'élément existe
// Check if an element currently exists
if ($('#element').length) {
}
Ugly Unicorn
// Check if an element currently exists
if ($('#element').length) {
}if ($('.element').length) {
// there is at least one element matching the selector
}$(function() {
var $button = $(".the_button");
alert (isStale($button));
$button.remove();
alert (isStale($button));
});
function isStale($elem)
{
return $elem.closest("body").length > 0;
};