● カーソル位置に指定したテキストを挿入する
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);
}
}
引用 : https://bit.ly/3eebMTB