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-rw-r--r--tools/js-optimizer.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/js-optimizer.js b/tools/js-optimizer.js
index f69278b0..e7a745e1 100644
--- a/tools/js-optimizer.js
+++ b/tools/js-optimizer.js
@@ -405,7 +405,7 @@ function removeUnneededLabelSettings(ast) {
// Various expression simplifications. Pre run before closure (where we still have metadata), Post run after.
var USEFUL_BINARY_OPS = set('<<', '>>', '|', '&', '^');
-var COMPARE_OPS = set('<', '<=', '>', '>=', '==', '===', '!=');
+var COMPARE_OPS = set('<', '<=', '>', '>=', '==', '===', '!=', '!==');
function simplifyExpressionsPre(ast) {
// Simplify common expressions used to perform integer conversion operations