分享当下较新的30道Vue面试题！ (qq.com)

The difference between vue and angular?

Vue and Angular are both popular JavaScript frameworks used for building web applications. Here are some key differences between them:

1. Learning Curve: Vue.js is generally considered easier to learn than Angular. Vue.js has a simpler syntax and a smaller API surface area than Angular, making it easier for developers to pick up quickly.

2. Size: Vue.js is smaller in size compared to Angular, which can impact application performance. Angular is a more comprehensive framework with more features out of the box, which can make it a better choice for larger and more complex applications.

3. Templating: Vue.js uses a template-based syntax, while Angular uses a component-based syntax. This means that Vue.js can be easier to read and understand, but Angular provides more structure and organization for larger applications.

4. State Management: Vue.js has a built-in state management library called Vuex, while Angular uses the RxJS library for state management. Both solutions are effective, but Vuex is generally considered simpler and easier to use.

5. Performance: Vue.js is faster than Angular in terms of rendering speed and startup time. However, Angular has a more robust change detection system, which can improve application performance for large and complex applications.

Overall, the choice between Vue.js and Angular depends on the specific needs of your project. If you are looking for a lightweight, easy-to-learn framework for smaller applications, Vue.js may be the better choice. If you are building a larger, more complex application that requires a more comprehensive framework with more features out of the box, Angular may be a better choice.

What kind of technology Vue borrowed from angular and react?

Vue.js, like many modern front-end frameworks, has been influenced by both Angular and React. Here are some of the technologies that Vue has borrowed from these frameworks:

1. Virtual DOM: React introduced the concept of a Virtual DOM, which is a lightweight representation of the actual DOM tree. This allows React to update the UI more efficiently by only re-rendering the parts of the UI that have changed. Vue.js also uses a Virtual DOM to achieve high performance and efficient updates.

2. Components: Both Angular and React use a component-based architecture, where the UI is broken down into smaller reusable components. Vue.js also uses this approach, making it easy to create reusable components and build complex UIs.

3. Directives: Vue.js borrows the concept of directives from Angular. Directives are special HTML attributes that allow you to add behavior to an HTML element. Vue.js provides a number of built-in directives, and also allows you to create custom directives.

4. Dependency Injection: Angular uses a Dependency Injection (DI) system to manage dependencies between components. Vue.js doesn't have a built-in DI system, but it does allow you to pass props and events between components to achieve similar functionality.

5. Reactivity: Vue.js has borrowed the concept of reactivity from both Angular and React. Reactivity refers to the ability of a framework to automatically update the UI when data changes. Vue.js achieves this through its reactivity system, which tracks changes to data and automatically updates the UI as needed.

Overall, Vue.js has borrowed technologies from both Angular and React, but has also added its own unique features and approach to building web applications.

Does Vue borrow template and data-binding from Angular? or from other frameworks?

Vue.js borrows the concept of templates and data-binding from Angular, as well as other front-end frameworks.

Like Angular, Vue.js uses templates to define the structure and layout of the UI. Templates in Vue.js are similar to those in Angular, allowing you to use expressions and directives to manipulate the UI. Vue.js also supports two-way data-binding, which allows changes to the UI to update the underlying data model, and changes to the data model to update the UI. This approach is similar to the data-binding system used in Angular.

However, Vue.js also introduces its own unique approach to templates and data-binding. For example, Vue.js templates are written in plain HTML, with additional Vue-specific syntax for directives and expressions. This makes Vue.js templates easier to read and understand for developers who are familiar with HTML. Additionally, Vue.js uses a reactivity system to automatically update the UI when the underlying data changes, which is slightly different from the data-binding approach used in Angular.

Overall, Vue.js has borrowed concepts from Angular and other front-end frameworks, but has also introduced its own unique approach to building web applications.

Show me your understanding about Vue.js?

Vue.js is an open-source JavaScript framework used for building dynamic and reactive user interfaces. It was created by Evan You in 2014, and has gained widespread popularity among developers due to its simplicity, flexibility, and performance.

At its core, Vue.js is built around the concept of components. A Vue.js component is a reusable piece of UI that can be composed together to build more complex UIs. Components in Vue.js are defined using a combination of HTML-like templates, JavaScript code, and CSS styles. Vue.js also provides a powerful reactivity system, which automatically updates the UI when data changes.

One of the unique features of Vue.js is its approach to directives. Directives in Vue.js are special attributes that can be attached to HTML elements, and are used to provide additional behavior and functionality. Vue.js provides a number of built-in directives, such as v-if, v-for, and v-bind, and also allows developers to create custom directives.

Vue.js also provides a number of other features and tools, including a command-line interface for scaffolding and building projects, a state management library called Vuex, and a routing library called Vue Router.

In summary, Vue.js is a powerful and flexible framework for building dynamic and reactive user interfaces. Its focus on components, directives, and reactivity make it easy to create complex UIs, while its simplicity and performance make it a popular choice among developers.

But you do not mention MVVM?

You are correct that I did not explicitly mention the MVVM pattern in my previous answer. However, it's worth noting that Vue.js is often described as a framework that follows the MVVM (Model-View-ViewModel) architecture.

In the MVVM pattern, the View is responsible for displaying data to the user, the Model represents the data and business logic, and the ViewModel acts as a mediator between the View and the Model, providing an abstraction layer and handling user input and interaction.

In Vue.js, components can be thought of as the View, the data and business logic can be thought of as the Model, and the ViewModel can be thought of as the Vue instance that controls the component. The Vue instance provides the data and methods that the component needs, and handles user input and interaction through event listeners and directives.

So while I did not explicitly mention MVVM in my previous answer, the architecture of Vue.js is often described as following this pattern.