When I export a project text is not selectable.
Is it possible to have text selectable for an HTML5 Canvas project?
The short answer is NO. Text in Canvas mode is rendered to an HTML canvas element, which is just a dumb bitmap.
The much longer answer is yes, but you have to basically cheat by programmatically creating HTML text elements at runtime and floating them above the canvas. This becomes even more tricky if you're allowing the canvas to scale.
This thread has a function I use for creating DIV layers containing arbitrary content above the stage: Re: How can I add video
But note that it only works with a non-scaled canvas, or a scaling canvas with a pile of helper code to also scale any elements floating above it.