Discussion on error messages and API versions of SAP ui5 getsaplogonlanguage is not a function

title ： About SAP UI5 this.language._getSAPLogonLanguage is not a function Error messages for

This error is using the latest SAP UI5 SDK And when you switch to debug mode , But not always .

Uncaught ModuleError: failed to execute module factory for ‘‘sap/ui/core/Core.js’’: this.language._getSAPLogonLanguage is not a function
at makeModuleError (https://sapui5.hana.ondemand.com/resources/sap-ui-core-dbg.js:1044:15)
at Module.failWith (https://sapui5.hana.ondemand.com/resources/sap-ui-core-dbg.js:816:13)
at https://sapui5.hana.ondemand.com/resources/sap-ui-core-dbg.js:1832:33
at requireAll (https://sapui5.hana.ondemand.com/resources/sap-ui-core-dbg.js:1747:12)
at executeModuleDefinition (https://sapui5.hana.ondemand.com/resources/sap-ui-core-dbg.js:1798:3)
at Object.ui5Define [as define] (https://sapui5.hana.ondemand.com/resources/sap-ui-core-dbg.js:1931:3)
at eval (https://sapui5.hana.ondemand.com/resources/sap/ui/core/Core-dbg.js?eval:8:8)
at eval ()
at execModule (https://sapui5.hana.ondemand.com/resources/sap-ui-core-dbg.js:1647:15)
at requireModule (https://sapui5.hana.ondemand.com/resources/sap-ui-core-dbg.js:1548:5)

In debug mode ：

Can't reproduce stably ：

adopt JavaScript operation HTML/CSS it is possible that , Consider the following code ：

className = "someCSSClass";

Or directly through CSS, for example . But be careful ：SAPUI5 Generated HTML and CSS It's not public API Part of , Changes may occur in patches and minor releases .

If you decide to rewrite the style , You need to in SAPUI5 Test and update changes every time . The prerequisite for this is that the developer can control SAPUI5 Version of , for example , The version used in the stand-alone scenario . When in SAP Fiori When running your application on the launchpad , Developers cannot have SAP UI5 Version control ,SAPUI5 It is to load all applications centrally . therefore ,SAP Fiori The startup platform application of should not override the style .

Never use or overwrite anything that does not belong to API Refer to the private function . Private functions usually ( But not always ) With a “_” As a prefix .

Unless otherwise stated ,SAP UI5 In the official website API refer to public API, It's a function 、 class 、 The name space 、 Control and its declared properties 、 Polymerization, etc. . public API The only definition of is API Reference resources , It is contained in SAPUI5 Demo Suite . The features not mentioned are not API Part of .

The following rules apply to the introduction of new api Or to the existing api Make incompatible changes :

• Major version (x.y .zz): The new major version can introduce new api Or to the existing api Make incompatible changes .

• minor (x.y .zz): New minor versions can introduce new api, But it can't include any api Incompatible changes for .

• Patch version (x.y .zz): The new patch version contains only fixes to existing implementations , But usually does not contain new features or incompatible API change .