JavaScript Interview Question #51: For Each Key
What happens here and what鈥檚 the output? . . . . . . . . . . . . . . . . . The first line of code defines a user object that has two fields: name and age....
JS Interview
Here you can check your JavaScript skills and make sure you鈥檙e ready for the technical interview. Each article has a colorful code snippet, a correct answer and a detailed explanation of the problem.
JavaScript Interview Question #50: How does Intl.Collator work in JS
What is Intl.Collator and how does it work in JS? What鈥檚 the difference between two sorts? What will be logged to the console? . . . . . . ....
JavaScript Interview Question #49: Add a new array element by index
Will the length of the JS array change? What鈥檚 the output? . . . . . . . . . . . . . . . . . All JavaScript arrays have the push function....
JavaScript Interview Question #48: Dog-sized Cat. JS Object Properties
How many errors are in this code snippet? What鈥檚 the output? . . . . . . . . . . . . . . . . . In JavaScript there are two ways to get access to the object properties....
JavaScript Interview Question #47: How Object.setPrototypeOf works in JS
What is Object.setPrototypeOf in JavaScript? How does it work? What鈥檚 the output? . . . . . . . . . . . . . . . . . Theory The function Object....
JavaScript Interview Question #46: length of JS functions
What鈥檚 the value of the length field for JavaScript functions? What will be logged to the console? . . . . . . . . . . . . ....
JavaScript Interview Question #45: 小urrency formatting in JS
How to format a string into a local currency in JavaScript? What鈥檚 the output? . . . . . . . . . . . . . . . ....
JavaScript Interview Question #44: Number vs BigInt in JS
What happens if we add an n suffix to a regular number in JavaScript? What鈥檚 the output? . . . . . . . . . . . . ....
JavaScript Interview Question #43: Object.toString and Array.toString
What鈥檚 the difference between Object.toString and Array.toString in JavaScript? What鈥檚 the output? . . . . . . . . . . . . . . . . . A regular behavior of the JavaScript function Object....
JavaScript Interview Question #42: How Math.max works in JS
How exactly Math.max works in JavaScript? What鈥檚 the output? . . . . . . . . . . . . . . . . . In JavaScript, the function Math....