CSS3 transform order matters: rightmost operation first

Question

When we use CSS3 transform: operation1(...) operation2(...), which one is done first?

The first operation done seems to be the one the most on the right., i.e. here operation2 is done before operation1. Just to be sure, is it true?

Note: I have read one thing and its contrary in some places (answers, articles on the internet), thus the question here.

Answer 1

Yes, the first operation done is the one the most on the right., i.e. here operation2 is done before operation1.

This MDN article states indeed:

The transform functions are multiplied in order from left to right, meaning that composite transforms are effectively applied in order from right to left.

Here is the documentation : http://www.w3.org/TR/css-transforms-1/.

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Example 1

Here the scaling is done first, and then the translation of 100px vertically (if translation was done first, the scaling would make the translation of 500px!)

#container { 
  	position: absolute; 
  	transform: translate(0,100px) scale(5); 
  	transform-origin: 0 0; }

<div id="container"><img src="https://i.stack.imgur.com/xb47Y.jpg"></img></div>

Example 2

Here the translation is done first, and then the scaling (the scaling done after makes that the translation looks like a 500px-translation!)

#container { 
  	position: absolute; 
  	transform: scale(5) translate(0,100px); 
  	transform-origin: 0 0; }

<div id="container"><img src="https://i.stack.imgur.com/xb47Y.jpg"></img></div>