AI can't do tricky changes
When I make a tricky change to my game, I laugh and think: 'at least, AI couldn't do this'
Posts
Leaving in old code, commented out
I leave in old code but comment it out. I can quickly see the old code. The code can look a bit messy. Other people might look at old versions in the source control system instead.
Hiding SVG that is referenced later
An SVG would not show when it was hidden in a 'div' with 'display: none' and referenced later in a 'use' tag. To fix this, I put the SVG in a 'defs' tag inside an outer 'svg' tag. I hide this outer 'svg' by saying: 'position: absolute', 'height: 0' and 'width: 0'.
Making JavaScript and CSS slightly smaller
I save space by setting a variable called '_' to 'this' at the start of a function that uses 'this' a lot. Saying 'background: aqua' is shorter than saying 'background-color: aqua'.