Ensure Sample

ensure-demo.js

$(document).ensure(function() {
   return $("p.test").exists();
}).done(function() {
   console.log("p.test exisits.");
});
      
$("body").ensure(function() {
    return $("a", this).exists();
}).done(function(self) {
    $("a", self).toggle();
});
      
$(selector).ensure({
    delay: 500,
    tries: 0,
    isValid: function() {
        return $(this).is(".loaded");
   }
}).done(function(self) {
    console.log("done loading resource");
}).fail(function() {
    console.log("failed to load resource");
});