diff --git a/app/assets/javascripts/02-editor.js b/app/assets/javascripts/02-editor.js
index 5d383cf..746141c 100644
--- a/app/assets/javascripts/02-editor.js
+++ b/app/assets/javascripts/02-editor.js
@@ -25,6 +25,17 @@ const restoreContent = (editorEl, contentEl) => {
 	contentEl.innerHTML = content
 }
 
+/* getRangeAt puede fallar si no hay una selección
+ */
+function safeGetRangeAt (num) {
+	try {
+		return window.getSelection().getRangeAt(num)
+	} catch (error) {
+		console.warn("No hay una selección!")
+		return null;
+	}
+}
+
 function uploadFile (file) {
 	return new Promise((resolve, reject) => {
 		const upload = new ActiveStorage.DirectUpload(
@@ -108,7 +119,8 @@ function setupMarkButton (button, mark, contentEl) {
 		let parentEl = getElementParent(sel.anchorNode)
 		//if (sel.anchorNode == parentEl) parentEl = parentEl.firstChild
 
-		const range = sel.getRangeAt(0)
+		const range = safeGetRangeAt(0)
+		if (!range) return
 
 		if (parentEl.matches(mark.selector)) {
 			const [left, right] = splitNode(parentEl, range)
@@ -169,7 +181,8 @@ function setupBlockButton (button, block, contentEl, editorEl) {
 			|| sel.focusNode == contentEl
 		) return
 
-		const range = sel.getRangeAt(0)
+		const range = safeGetRangeAt(0)
+		if (!range) return
 
 		let parentEl = sel.anchorNode
 		while (!isDirectChild(contentEl, parentEl)) parentEl = parentEl.parentElement
@@ -202,7 +215,8 @@ function setupParentBlockButton (button, parentBlock, contentEl) {
 			|| sel.focusNode == contentEl
 		) return
 
-		const range = sel.getRangeAt(0)
+		const range = safeGetRangeAt(0)
+		if (!range) return
 
 		let parentEl = sel.anchorNode
 		while (!isDirectChild(contentEl, parentEl)) parentEl = parentEl.parentElement
@@ -320,7 +334,8 @@ function cleanNode (node, contentEl) {
 				child.parentNode.removeChild(child.nextSibling)
 			}
 		} else if (child.nodeType === Node.ELEMENT_NODE) {
-			if (!hasContent(child) && !window.getSelection().getRangeAt(0).intersectsNode(child))
+			const range = safeGetRangeAt(0)
+			if (!hasContent(child) && (!range || !range.intersectsNode(child)))
 				child.parentNode.removeChild(child)
 
 			for (const mark of Object.values(marks)) {