szurubooru/client/js/controllers/not_found_controller.js

'use strict';

const topNavigation = require('../models/top_navigation.js');
const NotFoundView = require('../views/not_found_view.js');

class NotFoundController {
    constructor(path) {
        topNavigation.activate('');
        topNavigation.setTitle('Not found');
        this._notFoundView = new NotFoundView(path);
    }
}

module.exports = router => {
    router.enter(null, (ctx, next) => {
        ctx.controller = new NotFoundController(ctx.canonicalPath);
    });
}