jQuery Upgrade to 2.2.4 Dependency Issue

[ddruker]

Hello @lexich, Upon upgrading from jQuery >= 1.12.0 to jQuery >= 2.2.0 there is a dependency issue. The following type error appears in the Chrome console...

Screenshot

The error is caused by including the regions property below.

export default _BaseLayout.extend({
  regions: {
    header: {
      el: '.header',
      view: Header,
    },
  }

After setting some breakpoints I noticed that the template property is being set to null.

It seems like there are issues rendering templates. Have you seen this error before since the upgrade to newer versions of jQuery?

[lexich]

Unfortunately, I hadn't used backbone (and backbone-mixin) for 3 years and it's very hard to say what happends. Anyway i think that the main problem is in this.template content and $el referenced to document. I think that you should drive to this way.