select_text.js

function selectText(element) {
	let range
	let selection
	if (document.body.createTextRange) {
		//ms
		range = document.body.createTextRange()
		range.moveToElementText(element)
		range.select()
	} else if (window.getSelection) {
		//all others
		selection = window.getSelection()
		range = document.createRange()
		range.selectNodeContents(element)
		selection.removeAllRanges()
		selection.addRange(range)
	}
	return selection.toString() || range.toString()
}