add a better check for empty node

Author: Túlio Ornelas

extension/src/json-viewer/check-if-json.js

@@ -9,7 +9,6 @@ function allTextNodes(nodes) {
 function getPreWithSource() {
   var childNodes = document.body.childNodes;
 
-  if (childNodes.length > 1 && childNodes[0].nodeName === "#text"){
   if (childNodes.length > 1 && allTextNodes(childNodes)) {
     if (process.env.NODE_ENV === 'development') {
       console.debug("[JSONViewer] Loaded from a multiple text nodes, normalizing");
@@ -27,7 +26,7 @@ function getPreWithSource() {
       return childNode;
 
     // if Content-Type is text/html
-    } else if (nodeName === "#text" && !/^\s+$/g.test(textContent)) {
+  } else if (nodeName === "#text" && textContent.trim().length > 0) {
       if (process.env.NODE_ENV === 'development') {
         console.debug("[JSONViewer] Loaded from a text node, this might have returned content-type: text/html");
       }