diff --git a/modules/js/perf/perf_64bits.js b/modules/js/perf/perf_64bits.js
index dc4e234d4c..de75921e20 100644
--- a/modules/js/perf/perf_64bits.js
+++ b/modules/js/perf/perf_64bits.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if (isNodeJs) {
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_helpfunc.js b/modules/js/perf/perf_helpfunc.js
index c2ad7f2e0f..45cdd1c681 100644
--- a/modules/js/perf/perf_helpfunc.js
+++ b/modules/js/perf/perf_helpfunc.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if(isNodeJs) {
   var Base = require("./base");
diff --git a/modules/js/perf/perf_imgproc/perf_blur.js b/modules/js/perf/perf_imgproc/perf_blur.js
index 66c5f240e7..1f3981c132 100644
--- a/modules/js/perf/perf_imgproc/perf_blur.js
+++ b/modules/js/perf/perf_imgproc/perf_blur.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_cvtcolor.js b/modules/js/perf/perf_imgproc/perf_cvtcolor.js
index fbae5d1bca..a72236e5bc 100644
--- a/modules/js/perf/perf_imgproc/perf_cvtcolor.js
+++ b/modules/js/perf/perf_imgproc/perf_cvtcolor.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if (isNodeJs) {
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_dilate.js b/modules/js/perf/perf_imgproc/perf_dilate.js
index 5b6cd01682..5647cc3acd 100644
--- a/modules/js/perf/perf_imgproc/perf_dilate.js
+++ b/modules/js/perf/perf_imgproc/perf_dilate.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_erode.js b/modules/js/perf/perf_imgproc/perf_erode.js
index 8915ead40f..3edffbf534 100644
--- a/modules/js/perf/perf_imgproc/perf_erode.js
+++ b/modules/js/perf/perf_imgproc/perf_erode.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_filter2D.js b/modules/js/perf/perf_imgproc/perf_filter2D.js
index 4602befcbd..1a2169cae3 100644
--- a/modules/js/perf/perf_imgproc/perf_filter2D.js
+++ b/modules/js/perf/perf_imgproc/perf_filter2D.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_gaussianBlur.js b/modules/js/perf/perf_imgproc/perf_gaussianBlur.js
index b59aa83b84..5643fe4e6f 100644
--- a/modules/js/perf/perf_imgproc/perf_gaussianBlur.js
+++ b/modules/js/perf/perf_imgproc/perf_gaussianBlur.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_medianBlur.js b/modules/js/perf/perf_imgproc/perf_medianBlur.js
index 333bc8424c..29ff99663a 100644
--- a/modules/js/perf/perf_imgproc/perf_medianBlur.js
+++ b/modules/js/perf/perf_imgproc/perf_medianBlur.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_pyrDown.js b/modules/js/perf/perf_imgproc/perf_pyrDown.js
index 957ac7684d..df200e4f19 100644
--- a/modules/js/perf/perf_imgproc/perf_pyrDown.js
+++ b/modules/js/perf/perf_imgproc/perf_pyrDown.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_remap.js b/modules/js/perf/perf_imgproc/perf_remap.js
index 1aa69ecef7..38afef575a 100644
--- a/modules/js/perf/perf_imgproc/perf_remap.js
+++ b/modules/js/perf/perf_imgproc/perf_remap.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_resize.js b/modules/js/perf/perf_imgproc/perf_resize.js
index 5262d22489..ad2b949ed2 100644
--- a/modules/js/perf/perf_imgproc/perf_resize.js
+++ b/modules/js/perf/perf_imgproc/perf_resize.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_scharr.js b/modules/js/perf/perf_imgproc/perf_scharr.js
index 4726e76312..f4df15db55 100644
--- a/modules/js/perf/perf_imgproc/perf_scharr.js
+++ b/modules/js/perf/perf_imgproc/perf_scharr.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_sobel.js b/modules/js/perf/perf_imgproc/perf_sobel.js
index ddc09bb8f6..a082cd7b30 100644
--- a/modules/js/perf/perf_imgproc/perf_sobel.js
+++ b/modules/js/perf/perf_imgproc/perf_sobel.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_threshold.js b/modules/js/perf/perf_imgproc/perf_threshold.js
index 629628748d..71f55257a3 100644
--- a/modules/js/perf/perf_imgproc/perf_threshold.js
+++ b/modules/js/perf/perf_imgproc/perf_threshold.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_warpAffine.js b/modules/js/perf/perf_imgproc/perf_warpAffine.js
index dc3cf67af4..3917719869 100644
--- a/modules/js/perf/perf_imgproc/perf_warpAffine.js
+++ b/modules/js/perf/perf_imgproc/perf_warpAffine.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');
diff --git a/modules/js/perf/perf_imgproc/perf_warpPerspective.js b/modules/js/perf/perf_imgproc/perf_warpPerspective.js
index 252729e3f0..1b2e5b777a 100644
--- a/modules/js/perf/perf_imgproc/perf_warpPerspective.js
+++ b/modules/js/perf/perf_imgproc/perf_warpPerspective.js
@@ -1,4 +1,4 @@
-const isNodeJs = (typeof window) === 'undefined'? true : false;
+var isNodeJs = (typeof window) === 'undefined'? true : false;
 
 if　(isNodeJs)　{
   var Benchmark = require('benchmark');