Digit limit with form submit on enter (on iOS and Android, input type number not submit the form on "enter")

digitLimitWithFormSubmitDirective.js

.directive("digitLimit", function(){
	return {
		require: "^form",
		restrict: "A",
		link: function(scope, element, attrs, ctrl){
			var max = attrs.digitLimit;

			element.bind("keypress keydown", function(e){
				if(e.type == "keypress"){
					var currentValue = element.val();
					var isNumber = !isNaN(parseInt(String.fromCharCode(e.keyCode)));

					if((!isNumber || currentValue.length >= max) && e.keyCode != 8 && e.keyCode != 9){
						e.preventDefault();
					}
				}
				else if(e.type == "keydown"){
					if(e.keyCode == 9){
						console.log(ctrl);
						var formElement = angular.element(document.querySelector("form[name='" + ctrl.$name + "']"));
						var submitFn = formElement.attr("ng-submit");

						if(formElement && submitFn){
							var formScope = formElement.scope();
							formScope.$apply(function(){
								formScope.$eval(submitFn);
							});
						}
					}
				}
			});
		}
	}
})