diff --git a/samples/node/web/db/hello-sequelize/.vscode/launch.json b/samples/node/web/db/hello-sequelize/.vscode/launch.json
index 7514d2f..bb25704 100644
--- a/samples/node/web/db/hello-sequelize/.vscode/launch.json
+++ b/samples/node/web/db/hello-sequelize/.vscode/launch.json
@@ -12,7 +12,7 @@
             "preLaunchTask": null,
             "runtimeExecutable": null,
             "runtimeArgs": [
-                "--nolazy"
+                "--nolazy", "--use_strict"
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             "env": {
                 "NODE_ENV": "development"
diff --git a/samples/node/web/db/hello-sequelize/package.json b/samples/node/web/db/hello-sequelize/package.json
index 82f143c..3a44cb4 100644
--- a/samples/node/web/db/hello-sequelize/package.json
+++ b/samples/node/web/db/hello-sequelize/package.json
@@ -4,7 +4,7 @@
     "description": "Hello Sequelize example with async",
     "main": "start.js",
     "scripts": {
-        "start": "node start.js"
+        "start": "node --use_strict start.js"
     },
     "keywords": [
         "sequelize",
diff --git a/samples/node/web/db/model-sequelize/.vscode/launch.json b/samples/node/web/db/model-sequelize/.vscode/launch.json
index 7514d2f..bb25704 100644
--- a/samples/node/web/db/model-sequelize/.vscode/launch.json
+++ b/samples/node/web/db/model-sequelize/.vscode/launch.json
@@ -12,7 +12,7 @@
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             "runtimeExecutable": null,
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+                "--nolazy", "--use_strict"
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             "env": {
                 "NODE_ENV": "development"
diff --git a/samples/node/web/db/model-sequelize/package.json b/samples/node/web/db/model-sequelize/package.json
index f81ff08..74612e7 100644
--- a/samples/node/web/db/model-sequelize/package.json
+++ b/samples/node/web/db/model-sequelize/package.json
@@ -4,7 +4,7 @@
     "description": "Sequelize best practice example with async",
     "main": "start.js",
     "scripts": {
-        "start": "node start.js"
+        "start": "node --use_strict start.js"
     },
     "keywords": [
         "sequelize",
diff --git a/samples/node/web/koa/hello-koa/.vscode/launch.json b/samples/node/web/koa/hello-koa/.vscode/launch.json
index 7514d2f..bb25704 100644
--- a/samples/node/web/koa/hello-koa/.vscode/launch.json
+++ b/samples/node/web/koa/hello-koa/.vscode/launch.json
@@ -12,7 +12,7 @@
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+                "--nolazy", "--use_strict"
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                 "NODE_ENV": "development"
diff --git a/samples/node/web/koa/hello-koa/package.json b/samples/node/web/koa/hello-koa/package.json
index 44e91f8..34a083f 100644
--- a/samples/node/web/koa/hello-koa/package.json
+++ b/samples/node/web/koa/hello-koa/package.json
@@ -4,7 +4,7 @@
     "description": "Hello Koa 2 example with async",
     "main": "start.js",
     "scripts": {
-        "start": "node start.js"
+        "start": "node --use_strict start.js"
     },
     "keywords": [
         "koa",
diff --git a/samples/node/web/koa/url-koa/.vscode/launch.json b/samples/node/web/koa/url-koa/.vscode/launch.json
index 7514d2f..bb25704 100644
--- a/samples/node/web/koa/url-koa/.vscode/launch.json
+++ b/samples/node/web/koa/url-koa/.vscode/launch.json
@@ -12,7 +12,7 @@
             "preLaunchTask": null,
             "runtimeExecutable": null,
             "runtimeArgs": [
-                "--nolazy"
+                "--nolazy", "--use_strict"
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             "env": {
                 "NODE_ENV": "development"
diff --git a/samples/node/web/koa/url-koa/package.json b/samples/node/web/koa/url-koa/package.json
index b18a6d5..c2198b8 100644
--- a/samples/node/web/koa/url-koa/package.json
+++ b/samples/node/web/koa/url-koa/package.json
@@ -4,7 +4,7 @@
     "description": "koa2 example with url route",
     "main": "start.js",
     "scripts": {
-        "start": "node start.js"
+        "start": "node --use_strict start.js"
     },
     "keywords": [
         "koa",
diff --git a/samples/node/web/koa/url2-koa/.vscode/launch.json b/samples/node/web/koa/url2-koa/.vscode/launch.json
index 7514d2f..bb25704 100644
--- a/samples/node/web/koa/url2-koa/.vscode/launch.json
+++ b/samples/node/web/koa/url2-koa/.vscode/launch.json
@@ -12,7 +12,7 @@
             "preLaunchTask": null,
             "runtimeExecutable": null,
             "runtimeArgs": [
-                "--nolazy"
+                "--nolazy", "--use_strict"
             ],
             "env": {
                 "NODE_ENV": "development"
diff --git a/samples/node/web/koa/url2-koa/package.json b/samples/node/web/koa/url2-koa/package.json
index 13030c7..1380cb4 100644
--- a/samples/node/web/koa/url2-koa/package.json
+++ b/samples/node/web/koa/url2-koa/package.json
@@ -4,7 +4,7 @@
     "description": "koa 2 example with url route",
     "main": "start.js",
     "scripts": {
-        "start": "node start.js"
+        "start": "node --use_strict start.js"
     },
     "keywords": [
         "koa",
diff --git a/samples/node/web/koa/use-nunjucks/.vscode/launch.json b/samples/node/web/koa/use-nunjucks/.vscode/launch.json
index 31ab907..9568ffd 100644
--- a/samples/node/web/koa/use-nunjucks/.vscode/launch.json
+++ b/samples/node/web/koa/use-nunjucks/.vscode/launch.json
@@ -12,7 +12,7 @@
             "preLaunchTask": null,
             "runtimeExecutable": null,
             "runtimeArgs": [
-                "--nolazy"
+                "--nolazy", "--use_strict"
             ],
             "env": {
                 "NODE_ENV": "development"
diff --git a/samples/node/web/koa/view-koa/.vscode/launch.json b/samples/node/web/koa/view-koa/.vscode/launch.json
index 7514d2f..bb25704 100644
--- a/samples/node/web/koa/view-koa/.vscode/launch.json
+++ b/samples/node/web/koa/view-koa/.vscode/launch.json
@@ -12,7 +12,7 @@
             "preLaunchTask": null,
             "runtimeExecutable": null,
             "runtimeArgs": [
-                "--nolazy"
+                "--nolazy", "--use_strict"
             ],
             "env": {
                 "NODE_ENV": "development"
diff --git a/samples/node/web/koa/view-koa/package.json b/samples/node/web/koa/view-koa/package.json
index eca8ac3..b5aa202 100644
--- a/samples/node/web/koa/view-koa/package.json
+++ b/samples/node/web/koa/view-koa/package.json
@@ -4,7 +4,7 @@
     "description": "koa 2 example with nunjucks as view",
     "main": "start.js",
     "scripts": {
-        "start": "node start.js"
+        "start": "node --use_strict start.js"
     },
     "keywords": [
         "koa",
diff --git a/samples/node/web/rest/rest-hello/.vscode/launch.json b/samples/node/web/rest/rest-hello/.vscode/launch.json
index 7514d2f..bb25704 100644
--- a/samples/node/web/rest/rest-hello/.vscode/launch.json
+++ b/samples/node/web/rest/rest-hello/.vscode/launch.json
@@ -12,7 +12,7 @@
             "preLaunchTask": null,
             "runtimeExecutable": null,
             "runtimeArgs": [
-                "--nolazy"
+                "--nolazy", "--use_strict"
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             "env": {
                 "NODE_ENV": "development"
diff --git a/samples/node/web/rest/rest-hello/package.json b/samples/node/web/rest/rest-hello/package.json
index 2b1daee..381e2a1 100644
--- a/samples/node/web/rest/rest-hello/package.json
+++ b/samples/node/web/rest/rest-hello/package.json
@@ -4,7 +4,7 @@
     "description": "koa 2 example with rest api",
     "main": "start.js",
     "scripts": {
-        "start": "node start.js"
+        "start": "node --use_strict start.js"
     },
     "keywords": [
         "koa",
diff --git a/samples/node/web/rest/rest-koa/.vscode/launch.json b/samples/node/web/rest/rest-koa/.vscode/launch.json
index 7514d2f..bb25704 100644
--- a/samples/node/web/rest/rest-koa/.vscode/launch.json
+++ b/samples/node/web/rest/rest-koa/.vscode/launch.json
@@ -12,7 +12,7 @@
             "preLaunchTask": null,
             "runtimeExecutable": null,
             "runtimeArgs": [
-                "--nolazy"
+                "--nolazy", "--use_strict"
             ],
             "env": {
                 "NODE_ENV": "development"
diff --git a/samples/node/web/rest/rest-koa/package.json b/samples/node/web/rest/rest-koa/package.json
index 620e61b..27706be 100644
--- a/samples/node/web/rest/rest-koa/package.json
+++ b/samples/node/web/rest/rest-koa/package.json
@@ -4,7 +4,7 @@
     "description": "koa 2 example with rest api",
     "main": "start.js",
     "scripts": {
-        "start": "node start.js"
+        "start": "node --use_strict start.js"
     },
     "keywords": [
         "koa",
diff --git a/samples/node/web/test/async-test/.vscode/launch.json b/samples/node/web/test/async-test/.vscode/launch.json
index 7bcea18..705c4c1 100644
--- a/samples/node/web/test/async-test/.vscode/launch.json
+++ b/samples/node/web/test/async-test/.vscode/launch.json
@@ -15,7 +15,7 @@
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             "runtimeExecutable": null,
             "runtimeArgs": [
-                "--nolazy"
+                "--nolazy", "--use_strict"
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             "env": {
                 "NODE_ENV": "test"
diff --git a/samples/node/web/test/hello-test/.vscode/launch.json b/samples/node/web/test/hello-test/.vscode/launch.json
index 5324c44..9fda11f 100644
--- a/samples/node/web/test/hello-test/.vscode/launch.json
+++ b/samples/node/web/test/hello-test/.vscode/launch.json
@@ -12,7 +12,7 @@
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+                "--nolazy", "--use_strict"
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@@ -32,7 +32,7 @@
             "preLaunchTask": null,
             "runtimeExecutable": null,
             "runtimeArgs": [
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+                "--nolazy", "--use_strict"
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diff --git a/samples/node/web/ws/hello-ws/.vscode/launch.json b/samples/node/web/ws/hello-ws/.vscode/launch.json
index 97656b8..0127a14 100644
--- a/samples/node/web/ws/hello-ws/.vscode/launch.json
+++ b/samples/node/web/ws/hello-ws/.vscode/launch.json
@@ -12,7 +12,7 @@
             "preLaunchTask": null,
             "runtimeExecutable": null,
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-                "--nolazy"
+                "--nolazy", "--use_strict"
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                 "NODE_ENV": "development"
diff --git a/samples/node/web/ws/ws-with-koa/.vscode/launch.json b/samples/node/web/ws/ws-with-koa/.vscode/launch.json
index 7514d2f..bb25704 100644
--- a/samples/node/web/ws/ws-with-koa/.vscode/launch.json
+++ b/samples/node/web/ws/ws-with-koa/.vscode/launch.json
@@ -12,7 +12,7 @@
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+                "--nolazy", "--use_strict"
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diff --git a/samples/node/web/ws/ws-with-koa/package.json b/samples/node/web/ws/ws-with-koa/package.json
index e5450ad..d042632 100644
--- a/samples/node/web/ws/ws-with-koa/package.json
+++ b/samples/node/web/ws/ws-with-koa/package.json
@@ -4,7 +4,7 @@
     "description": "websocket with koa integration",
     "main": "start.js",
     "scripts": {
-        "start": "node start.js"
+        "start": "node --use_strict start.js"
     },
     "keywords": [
         "websocket",