html-css-js/js/lib/textSelection/1.html at master · denisde4ev/html-css-js · GitHub

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<!DOCTYPE html>
<html>
<head>
	<title>Selection Test</title>
	<style>
		button {
			margin-right: 10px;
		}
	</style>
</head>
<body>
	<h1>Select Some Text</h1>
	<div>
	<textarea style=width:2in;height:3in>
Lorem dolor sit amet
<u>consectetur</u> <i>adipiscing</i> <u>elit</u>
vel
	</textarea>
	</div>
	<button onclick="
// Get the current selection
const selection = window.getSelection();

// Get the start and end nodes of the selection
const startNode = selection.anchorNode;
const endNode = selection.focusNode;

// Get the start and end offsets of the selection
const startOffset = selection.anchorOffset;
const endOffset = selection.focusOffset;

// Set the new start and end offsets
const newStartOffset = startOffset + 1;
const newEndOffset = endOffset + 1;

// Set the new selection range
selection.setBaseAndExtent(startNode, newStartOffset, endNode, newEndOffset);
	">mv</button>
	</body>
</html>