The patterns outlined in the book fall into four categories: Foundational technology: Examines the raw technologies required for Ajax development Programming: Exposes techniques that developers have discovered to ensure their Ajax ... Code. on your tablet, and on your smart-phone. (It’s similar to findIndex(), but checks each element for equality with the value instead of using a testing function. I want to create HTML Source code editor like W3Schools. is continuously updated according to the latest web standards. Examples might be simplified to improve reading and learning. b) If onKeyPress returns false, the key-down event is cancelled. 19. The primary technique of inserting JavaScript into an HTML page is through the