> For the complete documentation index, see [llms.txt](https://docs.verygoodsecurity.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verygoodsecurity.com/vault/developer-tools/vgs-show/react-native-sdk/ui-components.md). # UI Components ## UI Components The SDK provides React Native components that subscribe to a `VGSShow` instance and display revealed content selected by `contentPath`. ### VGSShowLabel `VGSShowLabel` reveals and displays text inside a React Native `Text`. ```tsx const labelRef = React.useRef(null); { setHasText(true); }} onRevealError={(error) => { setStatus(`Text reveal failed (${error.code}).`); }} /> ``` Props: | Prop | Description | | ------------------ | ------------------------------------------------------------------------ | | `vgsShow` | Shared `VGSShow` instance. | | `contentPath` | Dot-separated path to a string field in the reveal response. | | `placeholder` | Text displayed before reveal, after clear, or when no text is available. | | `placeholderStyle` | React Native style applied only to placeholder text. | | `isSecureText` | Masks displayed text. | | `secureTextSymbol` | Mask symbol. A single character is recommended. | | `onTextChange` | Notification callback. The revealed text is not passed out. | | `onCopyTextFinish` | Called after copy with only the selected copy format. | | `onRevealError` | Called with `VGSShowError` when this label cannot reveal its field. | Ref actions: | Ref member | Description | | ----------------------------------- | ---------------------------------------------------------------- | | `clearText()` | Clears displayed text and shows the placeholder when configured. | | `copyToClipboard({ format })` | Copies `"raw"` or `"transformed"` text to the runtime clipboard. | | `setSecureText(rangeOrRanges)` | Masks one range or a set of ranges. | | `addTransformationRegex(formatter)` | Adds a regex display/copy transformation. | | `resetAllFormatters()` | Removes all text transformations. | #### Text formatting Formatting runs before secure masking. ```tsx React.useEffect(() => { const label = labelRef.current; if (label === null) { return; } label.resetAllFormatters(); label.addTransformationRegex({ pattern: /^(.{4})(.{4})(.{4})(.{4})$/u, template: "$1 $2 $3 $4" }); }, []); ``` Use transformations only for display or clipboard formatting. Do not move revealed text into app state. #### Secure text ```tsx ``` For partial masking, use the label ref: ```tsx labelRef.current?.setSecureText({ ranges: [ { start: 5, end: 8 }, { start: 10, end: 13 } ] }); ``` Ranges apply to the displayed text after transformations. Invalid ranges are ignored. An empty explicit ranges array masks nothing. #### Copy text ```tsx labelRef.current?.copyToClipboard({ format: "transformed" }); ``` Use `"transformed"` when possible. `"raw"` intentionally copies raw revealed text and should be allowed only when the product requirement and compliance review permit it. ### VGSShowImage `VGSShowImage` reveals base64 JPEG or PNG image content and renders it through React Native's `Image`. ```tsx const imageRef = React.useRef(null); { setHasImage(true); }} onImageError={(error) => { setStatus(`Image reveal failed (${error.code}).`); }} /> ``` Props: | Prop | Description | | --------------- | -------------------------------------------------------------------------------------------------------- | | `vgsShow` | Shared `VGSShow` instance. | | `contentPath` | Dot-separated path to a base64 image field. | | `contentMode` | `"scaleToFill"`, `"scaleAspectFit"`, `"scaleAspectFill"`, or `"center"`. Defaults to `"scaleAspectFit"`. | | `style` | React Native image style. Provide dimensions or flex layout. | | `onImageChange` | Notification callback. Image base64 is not passed out. | | `onImageError` | Called with `VGSShowError` when image content is missing or invalid. | Ref members: | Ref member | Description | | ---------- | -------------------------------------------------------------- | | `hasImage` | `true` when renderable image content is held by the component. | | `clear()` | Clears the current image. | Do not expose, log, hash, cache, or forward image base64 from application code. ### VGSShowPdf `VGSShowPdf` reveals base64 PDF content and renders it through the SDK's native PDF renderer dependency. ```tsx const pdfRef = React.useRef(null); { setHasDocument(true); }} onDocumentError={(error) => { setStatus(`PDF reveal failed (${error.code}).`); }} /> ``` Props: | Prop | Description | | --------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `vgsShow` | Shared `VGSShow` instance. | | `contentPath` | Dot-separated path to a base64 PDF field. | | `style` | React Native view style. Provide dimensions or flex layout. | | `pdfDisplayMode` | `"singlePage"` renders only the first page. `"singlePage"` and `"twoUp"` enable paging. `"singlePageContinuous"` and `"twoUpContinuous"` use continuous scrolling. Defaults to `"singlePageContinuous"`. The React Native renderer does not display two pages side by side. | | `pdfDisplayDirection` | `"vertical"` or `"horizontal"`. Defaults to `"vertical"`. | | `pdfAutoScales` | Maps to the renderer fit policy. Defaults to `true`. | | `displayAsBook` | Accepted for API compatibility with other VGS Show SDKs. It has no visual effect in the current React Native renderer. | | `pageShadowsEnabled` | Accepted for API compatibility with other VGS Show SDKs. It has no visual effect in the current React Native renderer. | | `pdfBackgroundColor` | Optional renderer background color. | | `onDocumentChange` | Notification callback. PDF base64 is not passed out. | | `onDocumentError` | Called with `VGSShowError` when PDF content is missing or invalid. | Ref members: | Ref member | Description | | ------------- | ------------------------------------------------------------ | | `hasDocument` | `true` when renderable PDF content is held by the component. | | `clear()` | Clears the current PDF. | Provide a stable size for the PDF renderer with `style`; otherwise the native view may render with no visible area. Increase `requestTimeoutInterval` for large documents when your route contract allows larger reveal responses. Do not expose, log, hash, cache, or forward PDF base64 from application code. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. 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