JSFiddle - React, Tailwind, and code Playground

by timdown

HTML

<input type="button" onclick="insertHtmlAtSelectionEnd('[BEFORE]', true)" value="Insert before">
<input type="button" onclick="insertHtmlAtSelectionEnd('[AFTER]', false)" value="Insert after">

<div contenteditable="true">Some editable text. Select some and press on of the buttons above.</div>

JavaScript

function insertHtmlAtSelectionEnd(html, isBefore) {
    var sel, range, node;
    if (window.getSelection) {
        sel = window.getSelection();
        if (sel.getRangeAt && sel.rangeCount) {
            range = window.getSelection().getRangeAt(0);
            range.collapse(isBefore);

            // Range.createContextualFragment() would be useful here but was
            // until recently non-standard and not supported in all browsers
            // (IE9, for one)
            var el = document.createElement("div");
            el.innerHTML = html;
            var frag = document.createDocumentFragment(), node, lastNode;
            while ( (node = el.firstChild) ) {
                lastNode = frag.appendChild(node);
            }
            range.insertNode(frag);
        }
    } else if (document.selection && document.selection.createRange) {
        range = document.selection.createRange();
        range.collapse(isBefore);
        range.pasteHTML(html);
    }
}