| Regular Expressions |
| reject() argument - Promises |
| Releases - Commands |
| Releases - Dialogs |
| Releases - Excel |
| Releases - Office.js File |
| Releases - Outlook |
| Releases - PowerPoint |
| Releases - Word |
| Reloading API Objects |
| Reloading Task Pane |
| Remainder % |
| removeAttachmentAsync |
| removeHandlerAsync - Binding. |
| removeHandlerAsync - CustomXmlPart. |
| removeHandlerAsync - Document. |
| removeHandlerAsync - Settings. |
| Removing Office Add-in |
| Render Props - React |
| REPL (Read Eval Print Loop) |
| Request Based Async |
| RequestContext |
| RequestContext - context. |
| RequestContext - ctx. |
| require('create-react-class') |
| require('prop-types') |
| require('react') |
| Require.js |
| requiredAttendees.addAsync |
| requiredAttendees.setAsync |
| Requirement Sets |
| Requirement Sets - ActiveView |
| Requirement Sets - AddinCommands |
| Requirement Sets - BindingEvents |
| Requirement Sets - CompressedFile |
| Requirement Sets - Custom Functions |
| Requirement Sets - CustomFunctionRuntime |
| Requirement Sets - CustomXmlParts |
| Requirement Sets - DialogAPI |
| Requirement Sets - DocumentEvents |
| Requirement Sets - ExcelAPI |
| Requirement Sets - File |
| Requirement Sets - HTMLCoercion |
| Requirement Sets - ImageCoercion |
| Requirement Sets - isSetSupported |
| Requirement Sets - MailBox |
| Requirement Sets - MatrixBindings |
| Requirement Sets - MatrixCoercion |
| Requirement Sets - OneNoteAPI |
| Requirement Sets - OOXML |
| Requirement Sets - OOXMLCoercion |
| Requirement Sets - PartialTableBindings |
| Requirement Sets - PdfFile |
| Requirement Sets - Selection |
| Requirement Sets - Settings |
| Requirement Sets - TableBindings |
| Requirement Sets - TableCoercion |
| Requirement Sets - TextBindings |
| Requirement Sets - TextCoercion |
| Requirement Sets - TextFile |
| Requirement Sets - WordAPI |
| requirements.isSetSupported |
| Resizing Arrays |
| resolve() argument - Promises |
| Resources - Images |
| Resources - LongStrings |
| Resources - ShortStrings |
| Resources - Urls |
| ResponseType - Enumeration |
| Responsive Grid - Fabric UI |
| REST APIs - Outlook |
| REST Endpoints |
| Rest Operator ( . . . ) |
| Restricted Production - break |
| Restricted Production - continue |
| Restricted Production - return |
| Restricted Production - throw |
| Restructuring Assignment |
| RestVersion - Enumeration |
| result.error.message |
| return await |
| return Promise.resolve() |
| return Statement |
| Revealing Module Pattern |
| Revealing Prototype Pattern |
| reverse - Array Method |
| Ribbon - Built-in Tabs |
| Ribbon - Custom Tabs |
| Ribbon - Disable Commands |
| Ribbon - Groups |
| Ribbon API |
| Ribbon Buttons |
| Ribbon Commands |
| Ribbon Commands = Add-in Commands |
| Ribbon Custom Tabs |
| Ribbon Customization |
| RoamingSettings |
| Round Trip |
| Ruby |
| Ruby on Rails |
| RuleCollection |
| Rules - Activation |
| Runtime Checks |
| Runtime Logging |
| |