Creating standard-compliant websites is principal aspect of our work. To test if your page is in quirks mode mode you can simply bookmark this JavaScript code on your browser and hit it while viewing the page that you want to find out its rendering mode.
My Books
Text Processing with JavaScript
Solve complex text validation, extraction, and modification problems efficiently in JavaScript.
Modern Async JavaScript
Delve into async features of JavaScript from ES2020 through ESNext. Start building custom asynchronous iterators and generators, and more for fast, lean code.
JavaScript Brain Teasers
Ready to test your JavaScript skills? Challenge yourself with these brain-teasing puzzles, supercharge your learning journey, and emerge as a JavaScript pro.