large text content scrolling #87

for example

fetch("https://fabien.benetou.fr/pub/home/future_of_text_demo/engine/").then(r=>r.text()).then( page => {
    startWindowRange=0
    lengthWindowRange=5
    setInterval( _ => { 
    	startWindowRange++
        content=page.split("\n")
            .slice(startWindowRange,startWindowRange+lengthWindowRange)
            .join("\n")
        document.getElementById("locationreload").setAttribute("value", content)
    }, 100) 
})

Fixed https://git.benetou.fr/utopiah/text-code-xr-engine/src/branch/code-editor