Ask HN: What HTML5 engines are used for iGaming

My company asked me to research what HTML5 engines, IDEs and tools are commonly used in iGaming. I know there are a lot of them (PlayCanvas, Defold, Godot, PhaserJS, Cocos2D, etc), but I´d like to know what the market is actually using. Someone here works at the iGaming industry and can say what are the engines and tools most commonly used in the field? Thanks!