did you know about audio and video tag in HTML5?
Senior Front End Engineer Interview Questions
2,000 senior front end engineer interview questions shared by candidates
Why is this code slow?
Create a dialog pop-up using plain HTML and Javascript. - Clicking the button should display a modal dialog with a form with two inputs and a submit button
It was about Frontend technology. What were your roles/responsibilities?
Q: What is your hiring experience and strategy?
//Give me the output console for the following piece of code : var foo = 'foo'; function bar() { setTimeout(() => { console.log(foo); }, 0); console.log(foo); // undefined console.log(bar()); // undefined console.log(foo); // bartwo var foo = 'bar'; function bar() { foo = 'bartwo'; } console.log(foo); // bar } bar(); console.log(foo);
Outer join two arrays const a = [ { id: 3, name: 'Matt' }, { id: 4, name: 'Greg' }, { id: 1, name: 'David' }, { id: 2, name: 'John' } ] const b = [ { id: 7, position: 'Outlier' }, { id: 2, position: 'Leader' }, { id: 3, position: 'Captain' }, { id: 6, position: 'Rogue' }, { id: 4, position: 'VP' }, { id: 5, position: 'Pawn'} ] Should create the following joined array: [ { id: 1, name: 'David', position: null}, { id: 2, name: 'John', position: 'Leader' }, { id: 3, name: 'Matt', position: 'Captain' }, { id: 4, name: 'Greg', position: 'VP' }, { id: 5, position: 'Pawn', name: null } { id: 6, position: 'Rogue', name: null }, { id: 7, position: 'Outlier', name: null } ] Should create the following joined array: [ { id: 1, name: 'David', position: null }, { id: 2, name: 'John', position: 'Leader' }, { id: 3, name: 'Matt', position: 'Captain' }, { id: 4, name: 'Greg', position: 'VP' }, { id: 5, position: 'Pawn', name: null } { id: 6, position: 'Rogue', name: null }, { id: 7, position: 'Outlier', name: null } ]
1. General questions about JS and Async JS. 2. Some simple object manipulation and use of promises (with a fake backend emulated with the use of setTimeout). 3. A text based snake 4. Some basic CSS 5. A timer with a reset button
You will be given link to a public repo (Not hard to find online if you are curious) which is a React project with some boilerplate codes. The project also includes mock service API which you are expected to call in order to fetch data and push into a data table.
How to handle authentication logic in React/Redux (e.g. OAuth2, OIDC)
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