javascript-execution-order.md

Javascript execution order

Outcome

You'll:

• Understand the order javascript code executes in.

Advice

When debugging a problem it's useful to understand the order Javascript statements execute in.

A bit like in maths there are rules for which order things execute in.

e.g.

console.log((3 * 2) + 4)

will do:

3
// => 3
2
// => 2
3 * 2
// => 6
(6) + 4
// => 10
console.log(10)
// prints "10"

The order of execution is defined here.

A practical list is:

• Brackets
• .'s e.g myArray.length
• function calls
• Assignments e.g. var x = 1

Tasks

• Tasks