Add module guard so the script still works in browsers. Attempt to keep the old closure reference code as well.

Author: TheSpyder

javascript/diff_match_patch_uncompressed.js

@@ -2410,10 +2410,24 @@ diff_match_patch.patch_obj.prototype.toString = function() {
   return text.join('').replace(/%20/g, ' ');
 };
 
-
-// The following export code was added by @ForbesLindesay
-module.exports = diff_match_patch;
-module.exports['diff_match_patch'] = diff_match_patch;
-module.exports['DIFF_DELETE'] = DIFF_DELETE;
-module.exports['DIFF_INSERT'] = DIFF_INSERT;
-module.exports['DIFF_EQUAL'] = DIFF_EQUAL;
+// CLOSURE:begin_strip
+// Lines below here will not be included in the Closure-compatible library.
+if (typeof module === 'object') {
+  // The following export code was added by @ForbesLindesay
+  module.exports = diff_match_patch;
+  module.exports['diff_match_patch'] = diff_match_patch;
+  module.exports['DIFF_DELETE'] = DIFF_DELETE;
+  module.exports['DIFF_INSERT'] = DIFF_INSERT;
+  module.exports['DIFF_EQUAL'] = DIFF_EQUAL;
+} else {
+  // Export these global variables so that they survive Google's JS compiler.
+  // In a browser, 'this' will be 'window'.
+  /** @suppress {globalThis} */
+  this['diff_match_patch'] = diff_match_patch;
+  /** @suppress {globalThis} */
+  this['DIFF_DELETE'] = DIFF_DELETE;
+  /** @suppress {globalThis} */
+  this['DIFF_INSERT'] = DIFF_INSERT;
+  /** @suppress {globalThis} */
+  this['DIFF_EQUAL'] = DIFF_EQUAL;
+}