FAQ   JavaScript FAQ


Topic Replies Views Activity
What is the difference between printing `3 + 4` and `'3 + 4'`?
introduction
40 30604 September 18, 2021
What are some examples of what javascript can be used to make?
general
38 100605 August 2, 2021
When to use `var` or `let`?
introduction ,  q-a
23 12701 August 26, 2021
Why do you need to register to use an API?
8 6473 January 21, 2021
What is an advantage of making a website asynchronous?
5 6647 September 6, 2020
Why did we pass an argument to xhr.send() for a POST request but not for GET?
2 4995 July 23, 2020
How does a URL shortener work?
12 8395 February 18, 2021
How useful are Built-in object methods?
12 5870 May 12, 2021
Whats the different between two (`==`) and three (`===`) equal signs?
conditionals ,  q-a
32 24841 August 28, 2021
What other types of responses does the XMLHttpRequest API support?
0 4390 March 7, 2019
FAQ: Objects - Pass By Reference
125 9638 September 15, 2021
Can I create my own JSX element attributes?
q-a ,  intro-to-jsx
9 10209 September 1, 2021
Can I find the current date using JS?
q-a
32 12862 September 9, 2021
What is the difference between document.write and console.log?
q-a
22 102948 September 15, 2021
When should you use single quotes or double quotes for strings?
33 50533 September 11, 2021
Why use a variable as the first argument in ReactDOM.render() instead of a JSX expression?
q-a
5 7287 October 10, 2020
Can I export more than one object using module.exports?
q-a
7 10143 October 3, 2020
If I give my variables an alias, can I use both the variable's alias and its original name?
1 4985 July 28, 2020
Are there any browsers with a JSX compiler built in?
q-a
1 17812 August 4, 2020
How does Javascript handle a negative modulo? (`-5 % 20`)
introduction ,  q-a
21 16249 August 25, 2021
Why do we write `if(sale)` instead of `if(sale===true)`?
conditionals ,  q-a
34 19959 September 13, 2021
FAQ: Welcome to Codecademy! - Write some code!
20 14237 September 8, 2021
Difference between a property and a method?
introduction ,  q-a
47 24379 August 2, 2021
What else can JavaScript be used for?
0 5764 October 18, 2018
Does the order of query parameters matter?
1 4706 June 21, 2021
Are there other ways to bring privacy to our Objects?
10 9590 June 11, 2021
What is a query string?
6 8225 August 26, 2021
Why should I use .forEach() vs a for loop?
q-a
3 3068 September 24, 2020
Why isn't .sort() working as expected?
20 3751 September 12, 2021
FAQ: JavaScript Promises - Chaining Multiple Promises
45 3151 August 18, 2021