FAQ   JavaScript FAQ


Topic Replies Views Activity
Are there any browsers with a JSX compiler built in?
q-a
1 23201 August 4, 2020
Is there a power operator in JavaScript?
q-a
0 5402 October 7, 2018
Whats the different between two (`==`) and three (`===`) equal signs?
conditionals ,  q-a
40 41232 November 8, 2022
What are the differences between `var` and `let`? Which should I use?
introduction ,  q-a
83 44364 August 31, 2022
Why do we write `if(sale)` instead of `if(sale===true)`?
conditionals ,  q-a
44 32909 January 16, 2022
When to use `var` or `let`?
introduction ,  q-a
23 22250 August 26, 2021
Why would you want to prevent code lines from running by using comments?
general ,  q-a
41 52987 November 29, 2022
FAQ: Welcome to Codecademy! - Welcome to Codecademy!
20 17265 October 25, 2021
Can I create my own JSX element attributes?
q-a ,  intro-to-jsx
9 12373 September 1, 2021
Why do I need to create a variable to store a module that is imported using require()?
q-a
2 5692 July 2, 2020
Do I have to use valid HTML tags when creating JSX elements?
q-a
0 13832 January 18, 2019
FAQ: Objects - Pass By Reference
174 13897 November 21, 2022
How useful are Built-in object methods?
16 7884 June 3, 2022
What does the send() method do?
4 9963 December 6, 2021
What other types of responses does the XMLHttpRequest API support?
0 4848 March 7, 2019
Can I find the current date using JS?
q-a
44 18250 December 3, 2022
What is the difference between a property and a method, and when do I need to use parenthesis?
introduction ,  q-a
41 25363 November 22, 2022
Why would we use string concatenation?
introduction ,  q-a
41 49580 March 28, 2022
Why should I use .forEach() vs a for loop?
q-a
7 5243 December 14, 2021
When should you use single quotes or double quotes for strings?
33 81110 November 22, 2021
How does a URL shortener work?
12 11669 February 18, 2021
Why do you need to register to use an API?
8 7257 January 21, 2021
What is an advantage of making a website asynchronous?
5 7917 September 6, 2020
Why did we pass an argument to xhr.send() for a POST request but not for GET?
2 5588 July 23, 2020
Why use a variable as the first argument in ReactDOM.render() instead of a JSX expression?
q-a
7 9304 October 25, 2022
FAQ: Welcome to Codecademy! - Write some code!
22 16199 April 4, 2022
Can I have multiple calls to ReactDOM.render() in a single JavaScript file?
q-a
25 19964 February 27, 2022
Difference between a property and a method?
introduction ,  q-a
49 40635 January 14, 2022
Does the order of query parameters matter?
1 5952 June 21, 2021
Are there other ways to bring privacy to our Objects?
10 12522 June 11, 2021