Web Developer 面试题与答案

问题 46. What is the role of the 'meta' tag with the 'charset' attribute in HTML?

The 'meta' tag with the 'charset' attribute specifies the character encoding for the HTML document, ensuring proper text rendering.

Example:

问题 47. Explain the concept of 'Progressive Enhancement' in web development.

Progressive Enhancement is a strategy where the core functionality and content are delivered to all users, with enhanced features provided to those with modern browsers or devices.

问题 48. What is the purpose of the 'aria-*' attributes in HTML?

The 'aria-*' attributes are used to enhance the accessibility of web content by providing additional information to assistive technologies.

Example:

X

问题 49. How does 'localStorage' differ from 'cookies' in web development?

'localStorage' allows for larger data storage on the client side, while cookies have size limitations and are sent with every HTTP request.

问题 50. What is the purpose of the 'V8' engine in the context of JavaScript?

The 'V8' engine is an open-source JavaScript engine developed by Google, used in Chrome and Node.js, responsible for executing JavaScript code in the browser or server environment.