Vue.js is a progressive JavaScript framework primarily used for building user interfaces and single-page applications. It is known for its adaptability, small file size, and the progressive learning curve.

Key Features

Virtual DOM

Vue uses a virtual DOM, which is a lightweight copy of the actual DOM. This approach significantly speeds up UI updates by only rendering what has changed.

JS and Template Integration

Vue combines JavaScript and HTML-like templates for component structure. It then uses a virtual DOM renderer to update the actual DOM when data changes.

Two-Way Data Binding

Vue offers two-way data binding using the v-model directive, where changes in the UI instantly reflect in the data model and vice versa.

Directives

Vue leverages HTML directives for actions, loops, and more. Examples include v-if, v-for, and v-on.

Integration with Major Front-End Tools

Vue pairs remarkably well with a broad array of front-end tools including:

• Webpack: For asset bundling.
• Babel: To transpile ES6.
• TypeScript: For type-safety.
• ESLint: For code linting.

Let’s look at the versioning and the stance on backward compatibility:

• Versioning Scheme: Vue adheres to Semantic Versioning, making it easier for users to understand when there are breaking changes.

• Backward Compatibility: While Vue places a strong emphasis on maintaining backward compatibility, it might introduce breaking changes in major releases. However, the Vue team assists users in the migration process, providing detailed documentation and migration paths.

Code Example: Bidirectional Data Binding

Here is the Vue.js code: