fix compat guard

scripts/build-funcs.js

@@ -28,7 +28,9 @@ import { checkCompatibility } from '../src/helpers';
  * @returns {string}
  */
 function prepareCompatibilityGuard() {
-    return `${checkCompatibility.toString()}\n${checkCompatibility.name}()`;
+    const compatibilityGuard = checkCompatibility;
+    const compatibilityGuardString = attachDependencies(compatibilityGuard);
+    return `${compatibilityGuardString}\n${compatibilityGuard.name}()`;
 }
 
 /**

src/helpers/check-compatibility.js

@@ -1,32 +1,3 @@
-/**
- * Checks if current browser is supported
- * To be injected to every scriptlet at build time
- *
- * isBrowserSupported is included to simplify injection
- * by skipping dependencies attachment
- *
- * @throws error on unsupported browser
- */
-export function checkCompatibility() {
-    const isBrowserSupported = () => {
-        // arr.every() is not used because missing global method
-        // would throw ReferenceError when added to array
-        return typeof fetch !== 'undefined'
-            && typeof Proxy !== 'undefined'
-            && typeof Reflect !== 'undefined'
-            && typeof Response !== 'undefined'
-            && typeof Array.prototype.includes !== 'undefined'
-            && typeof String.prototype.includes !== 'undefined'
-            && typeof String.prototype.startsWith !== 'undefined'
-            && typeof String.prototype.endsWith !== 'undefined'
-            && typeof Element.prototype.attachShadow !== 'undefined';
-    };
-
-    if (!isBrowserSupported()) {
-        throw new Error('Browser is not supported by AdGuard Scriptlets.');
-    }
-}
-
 /**
  * Checks if current browser is supported
  * For usage in tests
@@ -46,3 +17,22 @@ export const isBrowserSupported = () => {
         && typeof String.prototype.endsWith !== 'undefined'
         && typeof Element.prototype.attachShadow !== 'undefined';
 };
+
+/**
+ * Checks if current browser is supported
+ * To be injected to every scriptlet at build time
+ *
+ * isBrowserSupported is included to simplify injection
+ * by skipping dependencies attachment
+ *
+ * @throws error on unsupported browser
+ */
+export function checkCompatibility() {
+    if (!isBrowserSupported()) {
+        throw new Error('Browser is not supported by AdGuard Scriptlets.');
+    }
+}
+
+checkCompatibility.injections = [
+    isBrowserSupported,
+];