What are some alternatives?
When comparing Deku and Vue.js, you can also consider the following products
Polymer - Polymer is a library that uses the latest web technologies to let you create custom HTML elements.
AngularJS - AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop.
Riot.js - Riot allows teams to communicate across a wide range of collaboration apps.