Fixed emscripten_get_now in a shell

1 files changed, 1 insertions, 1 deletions

diff --git a/src/library_browser.js b/src/library_browser.js
index d007d9a7..d9fd3ee5 100644
--- a/src/library_browser.js
+++ b/src/library_browser.js
@@ -805,7 +805,7 @@ mergeInto(LibraryManager.library, {
         var t = process['hrtime']();
         return t[0] * 1e3 + t[1] / 1e6;
     }
-    else if (window['performance'] && window['performance']['now']) {
+    else if (ENVIRONMENT_IS_WEB && window['performance'] && window['performance']['now']) {
       return window['performance']['now']();
     } else {
       return Date.now();