Use searchable names

We will read more code than we will ever write. It’s important that the code we do write must be readable and searchable. By not naming variables that end up being meaningful for understanding our program, we hurt our readers. Make your names searchable. Tools like ESLint can help identify unnamed constants.

Bad:

// What the heck is 86400000 for?
setTimeout(restart, 86400000);

Good:

// Declare them as capitalized named constants.
const MILLISECONDS_PER_DAY = 24 * 60 * 60 * 1000; // 86400000

setTimeout(restart, MILLISECONDS_PER_DAY);