Reduce luigi client and core bundle size

.github/pull-request-template.md

@@ -0,0 +1,17 @@
+<!--   Thank you for your contribution. Before you submit the pull request:
+1. Follow contributing guidelines, templates, the recommended Git workflow, and any related documentation.
+2. Read and submit the required Contributor Licence Agreements (https://github.com/kyma-project/community/blob/master/CONTRIBUTING.md#agreements-and-licenses).
+3. Test your changes and attach their results to the pull request.
+4. Update the relevant documentation.
+-->
+
+**Description**
+
+Changes proposed in this pull request:
+
+- ...
+- ...
+- ...
+
+**Related issue(s)**
+<!-- If you refer to a particular issue, provide its number. For example, `Resolves #123`, `Fixes #43`, or `See also #33`. -->

client/src/helpers.js

@@ -2,7 +2,12 @@
  * Creates a random Id
  * @private
  */
-export const getRandomId = () => Math.floor(Math.random() * 1e9) + '';
+export const getRandomId = () => {
+  // window.msCrypto for IE 11
+  return (window.crypto || window.msCrypto).getRandomValues(
+    new Uint32Array(1)
+  )[0];
+};
 
 /**
  * Simple function check.

client/src/uxManager.js

@@ -1,5 +1,5 @@
 import { LuigiClientBase } from './baseClass';
-import { randomBytes } from 'crypto';
+import { getRandomId } from './helpers';
 
 /**
  * Use the UX Manager to manage the appearance features in Luigi.
@@ -163,7 +163,7 @@ class UxManager extends LuigiClientBase {
     */
   showAlert(settings) {
     //generate random ID
-    settings.id = randomBytes(4).toString('hex');
+    settings.id = getRandomId();
 
     if (settings.closeAfter && settings.closeAfter < 100) {
       console.warn(

core/src/App.html

@@ -640,8 +640,7 @@
 
         if (!settings.id) {
           //generate the ID in case it hasn't came from an old version of LuigiClient
-          const crypto = require('crypto');
-          settings.id = crypto.randomBytes(4).toString('hex');
+          settings.id = GenericHelpers.getRandomId();
         }
 
         if (

core/src/utilities/helpers/generic-helpers.js

@@ -1,5 +1,17 @@
 // Standalone or partly-standalone methods that are used widely through the whole app and are synchronous.
 
+/**
+ * Creates a random Id
+ * @returns random numeric value {number}
+ * @private
+ */
+export const getRandomId = () => {
+  // window.msCrypto for IE 11
+  return (window.crypto || window.msCrypto).getRandomValues(
+    new Uint32Array(1)
+  )[0];
+};
+
 export const isFunction = anyParam =>
   anyParam && {}.toString.call(anyParam) === '[object Function]';