Prevent internal links in iOS standalone web apps from opening in Mobile Safari

gistfile1.js

if (window.navigator.standalone) {
	var local = document.domain;
	$('a').click(function() {
		var a = $(this).attr('href');
		if ( a.match('http://' + local) || a.match('http://www.' + local) ){
			event.preventDefault();
			document.location.href = a;
		}
	});
}

It would be better to delegate the events, then you will only attach one event handler, instead of multiple.

Change it to:

if (window.navigator.standalone) {
    var local = document.domain;
    $('document').on('click', 'a', function() {
        var a = $(this).attr('href');
        if ( a.match('http://' + local) || a.match('http://www.' + local) ){
            event.preventDefault();
            document.location.href = a;
        }
    });
}

And also just flagging that this wouldn't work for urls starting with https://

Some corrections

function escapeRegExp(string){
    return string.replace(/([.*+?^${}()|\[\]\/\\])/g, "\\$1");
}

if (window.navigator.standalone) {
    var local = document.domain;
    $(document).on('click', 'a', function(event) {
        var a = $(this).attr('href');
        if ( a.match('https?://(www\\.)?' + escapeRegExp(local))){
            event.preventDefault();
            document.location.href = a;
        }
    });
}

Note document shouldn't be quoted and event should be added to the function signature.