Video: Modern JavaScript: Leveling Up Arrays and Intl

Hi, I'm Mariko from Chrome Developer Relations Team. Let's dive into the talk, leveling up JavaScript. I sat down and learned JavaScript. I sat down and learned ES6 again. TC39 has published a new version of JavaScript spec every year. I want to focus on the parts of JavaScript that got updates recently. So ArrayFlat creates a new flattened array. You can also pass a depth argument to flatten nested arrays. Another method, copyToReserve, creates a reversed copy of an array. There's also copy to sort, which creates a sorted copy of an array. Another useful method is array to spliced, which allows you to remove and add items to a copied array. Lastly, the array at method returns an item at a given index. Array at accepts negative numbers for reverse order lookup. Find last iterates in reverse order and returns the item or index. Copy to change the value at a given index with a function. Object group by allows grouping and creating a new object by type. JavaScript intl allows for word segmentation in different languages, improving readability. It also includes features like data type format, number format, and plural rules for locale-based results. Staying up to date on web features is challenging due to time-consuming research and potential errors in implementation. Baseline provides clear information on web platform features supported by major browsers, ensuring compatibility without issues. Baseline provides two levels of support: newly available and widely available. By aligning your project to Baseline, you can confidently avoid browser compatibility issues. You can use Baseline to keep up with what's new on the web by installing the Baseline widget. Websites and dashboards like feature explorer and web starters.dev have been released. The project roadmap includes developer tooling and integrating Baseline into linters and actions. Check the RAM archive insights page for user data based on Baseline years. We are planning for more tools next year, including linting and AI integration.