IE9+ compatibility

[revolunet]

Hi @bydooweedoo ;)

For some reason, something weird happens in IE9.

When i load a bunch of files, the callback is fired before the files are evaluated. They may be loaded, i dont know but not evaluated for sure.

Heres where it failed and my dirty workaround (the if typeof part):

Loader.reset();
Loader.addApplication('MyApp', MyApp_requirements);
Loader.start('MyApp', function() {
    if (typeof(Seadragon)=='undefined') {
        setTimeout(Loader.callback, 250);
        return;
    }
    Seadragon.Config.imgPath = '/apps/widget/static/img/seadragon';
});

In some case (not always), the Seadragon variable, defined in one of the loaded file, was undefined....

[revolunet]

the async/defer attribute on script tags may help