Bootstrapping ​

Bootstrapping is the process of loading the UI5 runtime into the browser. abap2UI5 generates a <script src="…/sap-ui-core.js"> tag in the page <head>; the URL decides which UI5 version is loaded, from which delivery channel (CDN or your own server) and whether the cache-buster is active.

Pick a Bootstrap Source ​

METHOD z2ui5_if_ui5_exit~set_config_http_get.

    cs_config-src = `https://ui5.sap.com/1.116.0/resources/sap-ui-core.js`.

ENDMETHOD.

Without an override, abap2UI5 uses the OpenUI5 cache-buster URL — i.e. the current latest OpenUI5 build (see Pinning a Version below before relying on this in production).

Common Sources ​

OpenUI5 vs SAPUI5 ​

• OpenUI5 (sdk.openui5.org) is the Apache-licensed open-source subset of UI5. It contains all libraries a typical abap2UI5 app uses: sap.m, sap.ui.core, sap.ui.layout, sap.ui.table, sap.ui.unified, sap.uxap, sap.f, sap.tnt.
• SAPUI5 (ui5.sap.com) is the SAP-licensed superset. It adds e.g. sap.ui.comp (Smart Controls, ValueHelpDialog), sap.viz (VizFrame charts), sap.ui.richtexteditor (RichTextEditor), sap.ui.export (spreadsheet export), sap.suite.ui.commons, sap.ui.generic.app and the Fiori Elements floorplans.

If you only need controls available in OpenUI5 — which covers the vast majority of abap2UI5 apps — stick with sdk.openui5.org. Switch to ui5.sap.com only when you genuinely need a sap.ui.comp.* control or another SAPUI5-only library: OpenUI5 cannot load their controls.

Pinning a Version ​

Hard-coding a version (/1.116.0/) keeps your app stable when SAP ships a new patch. Without a version the CDN serves the current "evergreen" release, which is convenient but can break the app the next time SAP rolls out a change. For productive apps, pin the version explicitly.

Cache-Buster ​

URLs containing sap-ui-cachebuster append a versioned token to every asset URL, so the browser cache is invalidated automatically whenever SAP releases a new build. Use it when you intentionally stay on the latest release.

Local Hosting ​

If your gateway has the UI5 ABAP repository (/sap/public/bc/ui5_ui5/resources/) installed, you can serve UI5 from your own SAP system instead of a CDN. This is faster on the intranet, works offline and avoids any external dependency, but you need a basis admin to keep the UI5 version current. See UI5 Version for the available approaches.

See Also ​

• Official SAP documentation on bootstrapping variants and the supported tags.
• Bootstrap Attributes — how to add extra data-sap-ui-* parameters next to src.