JSFiddle - React, Tailwind, and code Playground

by caub

HTML

<pre id="evts"></pre>
<p class="editable" contenteditable>
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum
</p>

CSS

pre {margin:0;}

JavaScript

Text.prototype.closest = function(s) {return this.parentNode.closest(s); }

document.addEventListener('selectionchange', e={
	//console.log('sel change');
});

document.addEventListener('mousedown', emit);
document.addEventListener('mouseup', emit);
document.addEventListener('drop', emit);
document.addEventListener('mousemove', throttleEvents(emit, 50));
document.addEventListener('keydown', throttleEvents(emit, 100));
document.addEventListener('keyup', emit);
let lastR = document.createRange();
function emit(e){
  let r = getRange();
  console.log('sel', e.type);
  if (!equals(r, lastR)){
    document.dispatchEvent(new CustomEvent('selectchange', {detail: e }));
  }
  lastR = r;
}

document.addEventListener('selectchange', e=>{
	console.log('s change', e.detail.type);
})

function throttleEvents(cb, delay) {
	let d=0;
	return function (e) {
		let _d = Date.now(); 
		if (_d-d>delay ){ d = _d; cb.call(this, e);  }
	}
}

var sel = document.getSelection();
var getRange = _=> sel.rangeCount?sel.getRangeAt(0):dummyRange;

function equals(r1, r2){
	return r1.compareBoundaryPoints(Range.START_TO_START, r2)===0 && r1.compareBoundaryPoints(Range.END_TO_END, r2)===0;
}
/*function equals(r1, r2){
	return r1.startContainer===r2.startContainer && r1.endContainer===r2.endContainer && r1.startOffset===r2.startOffset && r1.endOffset===r2.endOffset;
}*/

var dummyRange=document.createRange(); //used when there's no active range, for chrome
dummyRange.setStartBefore(document.body.firstChild);
dummyRange.collapse();