Building a Fast Website for Every Single Visitor

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Learn how to build fast, adaptive web applications that dynamically respond to user conditions and context in this informative talk. Discover the principles and techniques behind adaptive design, including responsive layouts and dynamic interactions, optimized for different browsers, device strengths, internet speeds, screen sizes, and user preferences. Explore the role of data-driven decision-making and user analytics in tailoring content and features quickly and efficiently based on these variables. Gain practical insights into implementing fast, adaptive web apps using various technologies and frameworks. Understand the significance of user testing and feedback loops in refining the application for a seamless and speedy user experience. Walk away with actionable strategies to create personalized, high-performance web experiences that drive engagement and success.

This talk has been presented at React Advanced 2024, check out the latest edition of this React Conference.

FAQ

User perception is crucial because it varies depending on the user's context, such as their device and connection speed, which affects how fast or slow a website feels to them.

The two methods are lab testing, which simulates user experience, and field testing (or real user monitoring), which collects real data from users.

Developers can use responsive images with the 'source set' attribute to provide different image sizes for different devices, ensuring better performance and user experience.

Browser list helps bundlers like Webpack and Babel to know which features to polyfill or transpile, ensuring compatibility with the specified browsers and reducing unnecessary code.

Developers can use the 'window.navigator.deviceMemory' API to get an approximate number of gigabytes of RAM on the user's device, allowing them to tailor the user experience accordingly.

The 'Hardware Concurrency' API provides the number of logical processor cores, helping developers optimize performance by tailoring resource-intensive tasks based on the user's device capabilities.

A user's internet connection speed can drastically impact how quickly a website loads, affecting their overall experience. Developers can use APIs to detect connection speed and adjust content delivery accordingly.

The 'Effective Type' API gives an estimate of the user's network conditions (like 4G or 3G). It is controversial due to privacy concerns, as it can potentially be used to infer a user's location and movements.

The Aurora project collaborates with frameworks to optimize image delivery, providing an image component that is optimized out of the box for better performance.

The talk focuses on building a fast and accessible website for every user, emphasizing the importance of considering user perception and adaptive implementation.

Medhat Dawoud
Medhat Dawoud
31 min
25 Oct, 2024

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Video Summary and Transcription

This talk focuses on building a fast and accessible website for all users, highlighting the importance of performance and user experience optimization. It emphasizes the need for adaptive implementation to cater to different devices and user conditions. The talk also discusses the factors beyond the developer's control, such as screen size, browsers, devices, internet connection, and sitting position. It highlights the significance of optimizing image components for various devices and the role of browser support and rendering engines. The speaker discusses the use of future APIs and the challenges of browser compatibility, as well as optimizing image formats and bundler compatibility. The talk provides insights on controlling bundler and device compatibility, optimizing CPU usage, internet connection, and JavaScript form submission. It concludes with a proposal to respond with save data instead of effective type for limited internet connections and recommends using React with adaptive hooks for better user experiences. Overall, the talk covers essential aspects of building a fast and accessible website.
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