Build, test, and debug regular expressions
Extracts the JSON object assigned to window.Quizlet["MiniFlashcards"] in Quizlet page source code. Uses a positive lookbehind to anchor after the JavaScript variable declaration and a lookahead for '; QLoad' to capture the complete JSON payload between curly braces, excluding any '<' characters. Commonly used in web scraping to pull embedded flashcard set data from Quizlet study pages.