关于selection和range的一些认识
原文链接：/p/44970200
相关代码
function insertContent() {let contentHtml = '<p>插入一个p标签</p>';// console.log(imgHtml);insertHtmlAtCaret(contentHtml);}function insertHtmlAtCaret(html) {var sel, range;if (window.getSelection) {// IE9 and non-IEsel = window.getSelection();if (sel.getRangeAt && sel.rangeCount) {range = sel.getRangeAt(0);range.deleteContents();// Range.createContextualFragment() would be useful here but is// 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);// Preserve the selectionif (lastNode) {range = range.cloneRange();range.setStartAfter(lastNode);range.collapse(true);sel.removeAllRanges();sel.addRange(range);}}} else if (document.selection && document.selection.type != "Control") {// IE < 9document.selection.createRange().pasteHTML(html);}}
