There is a number of 'fiddlers' around the web for doing quick prototyping, such as jsfiddle.net, codepen.io, es6fiddle.net... Now, even https://fiddles.io/ exists... they gathered a respectful list of web-based prototyping pads there, for different languages. I can see that there is new great updates coming into codepen.io each day, so maybe other developers too much love the chrome console, as much as I am?