Many people think that commenting is a waist of time. Espacially when you're the only one reading your code. But 6 months from now, it might not be as easy to remember why you solved something a special way as you think.
Comment your code and save time!
Single line comments
I think the type of JavaScript comments I use most is the single line comments. Here's a couple of examples:
// Set variables
const a = 'a'
let b = 'b'
// Change variable
b = 'changed to d'
// Log
console.log('b:', b)Another typical use of the single-line comment is to use it prevent a line of code from running.
a = 1
b = 2
//console.log(a)If you run this code, the line with console.log will not be executed.
Multi-line comments
Comments can also span over multiple lines. Check this example:
/*
This function will take to parameters
and combine them.
*/
function combine(a, b) {
return a + b
}Multi-line comments makes it easy to add a good description of a function or a part of your code.