Merge pull request #1151 from tvongaza/use-nonce-and-content-attribut…

…e-for-csp

Read the csp meta tag nonce attribute and fall back to content

src/trix/core/helpers/custom_elements.js

@@ -20,7 +20,8 @@ const insertStyleElementForTagName = function(tagName) {
 const getCSPNonce = function() {
   const element = getMetaElement("trix-csp-nonce") || getMetaElement("csp-nonce")
   if (element) {
-    return element.getAttribute("content")
+    const { nonce, content } = element
+    return nonce == "" ? content : nonce
   }
 }