What is Vue.js and how does it differ from other frameworks?

Vue.js is a progressive JavaScript framework for building user interfaces. Unlike other frameworks like Angular or React, Vue is designed to be incrementally adoptable, making it easier to integrate with existing projects. Its core library focuses on the view layer only, allowing developers to create single-page applications (SPAs) with ease.

Here’s a step-by-step comparison:

1. Design Philosophy: Vue is more flexible and less opinionated, allowing for easier integration.
2. Learning Curve: Vue has a gentle learning curve, ideal for beginners.
3. Size: Vue is lightweight, making it faster to load and execute.

For example, integrating Vue into an existing HTML page is as simple as including a CDN link:

<script src="https://cdn.jsdelivr.net/npm/vue@2"></script>