Make eslint happy

qutebrowser/javascript/webelem.js

@@ -52,12 +52,15 @@ window._qutebrowser.webelem = (function() {
         var caret_position = 0;
         try {
             caret_position = elem.selectionStart;
-        } catch (e) {
-            if (e instanceof DOMException && e.name === "InvalidStateError") {
+        } catch (err) {
+            if (
+                err instanceof DOMException &&
+                err.name === "InvalidStateError"
+            ) {
                 // nothing to do, caret_position is already 0
             } else {
                 // not the droid we're looking for
-                throw e
+                throw err;
             }
         }