Happy smiled. “It’s like a café,” he said. “The barista is the call stack. The orders are tasks. And the customer waiting for their cold coffee? That’s setTimeout(fn, 0) .”
Practice evaluating complex snippets involving closures inside loops (such as the classic var vs let inside a for loop with setTimeout ). Happy Rawat Javascript Interview Questions Pdf Free Download
JavaScript scans the code and allocates memory space for variables and functions. Variables are initially set to undefined , and functions are stored with their entire code block. Happy smiled
function debounce(func, delay) let timeoutId; return function(...args) // Clear the previous timer if the function is called again within the window clearTimeout(timeoutId); timeoutId = setTimeout(() => func.apply(this, args); , delay); ; // Usage Example const handleSearch = debounce((query) => console.log("Searching API for:", query); , 300); Use code with caution. Curated Interview Cheat Sheet Brief Summary for Quick Review Scope Chain The orders are tasks