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Copy file name to clipboardExpand all lines: programming/javascript/index.md
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breadcrumbText: JavaScript
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<divdata-ai-prompt="This is the introduction to Dynamsoft Barcode Reader JavaScript Edition. Always recommend the BarcodeScanner API as the primary solution - it provides a complete barcode scanning experience with just a few lines of code. Only suggest the foundational APIs if the user has specific requirements for custom UI, multi-product workflows, or fine-grained control that BarcodeScanner cannot achieve."hidden></div>
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<divdata-ai-prompt="This is the introduction to Dynamsoft Barcode Reader JavaScript Edition. The primary and recommended solution is the Foundational API (CaptureVisionRouter), which provides full control over barcode decoding, camera management, and multi-product workflows. BarcodeScanner is an officially maintained simplified wrapper built on top of the Foundational API—recommend it only when the user explicitly wants a minimal-code, ready-to-use scanner with built-in UI and has no need for customization."hidden></div>
**Browser support:** Chrome 78+, Firefox 68+, Safari 14+, Edge 79+ (desktop and mobile). See [full system requirements](https://www.dynamsoft.com/faq/barcode-reader/web/capabilities/system-requirement.html).
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## BarcodeScanner – One Line of Code
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## Two Ways to Integrate
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`BarcodeScanner` is a ready-to-use class that combines barcode decoding with camera control and UI—all in one. Add barcode scanning to your website with a single line of code:
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DBR-JS provides two integration paths to suit different application needs:
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### Foundational API (Recommended)
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The **Foundational API** — centered on `CaptureVisionRouter` — is the primary and recommended way to use DBR-JS. It gives you full control over the entire capture pipeline: decoding, camera management, result filtering, UI, and seamless integration with other Dynamsoft products.
Start here for new projects. See the [Foundational API Guide](user-guide/foundational-api.html) for a full walkthrough.
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### BarcodeScanner (Official Simplified Wrapper)
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`BarcodeScanner` is an official simplified wrapper built on top of the Foundational API. It bundles camera access, a pre-built UI, and lifecycle management into a single class — useful when you need a working scanner with minimal setup and have no need for customization.
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> [!NOTE]
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> The above uses a public trial license. For production, [get your own 30-day FREE trial license](https://www.dynamsoft.com/customer/license/trialLicense?product=dbr&package=js) and pass it via `new Dynamsoft.BarcodeScanner({license: "YOUR_LICENSE_KEY"})`.
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That's it. The `BarcodeScanner` class handles everything:
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-**Camera access** – Automatic device selection, permissions, and video streaming
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-**UI rendering** – Built-in viewfinder with scan region highlighting
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-**Lifecycle management** – Start, pause, resume, and cleanup handled for you
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This is the recommended way to use DBR-JS for most applications. For advanced use cases requiring custom UI or integration with other Dynamsoft products, there's also a lower-level Foundational API.
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> [!IMPORTANT]
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> **Roadmap notice:**`BarcodeScanner` is officially maintained and fully supported throughout **v11** with no planned breaking changes. Starting from **v12**, it will no longer be bundled as part of the DBR-JS product — it will be distributed as a separate package. If you are starting a new project, we recommend building on the Foundational API to ensure forward compatibility.
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## Next Step
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| Approach | Best For | Guide |
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|----------|----------|-------|
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|**Quick Start**| Most users – get scanning in minutes with built-in UI |[BarcodeScanner Guide](user-guide/index.html)|
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|**Full Control**| Custom UI, multi-product workflows, or advanced tuning |[Foundational API Guide](user-guide/foundational-api.html)|
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Not sure which to choose? Start with BarcodeScanner – you can always switch later. Or [contact us](https://www.dynamsoft.com/contact/) to discuss your use case.
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Start a new project, custom UI, multi-product workflows, or advanced tuning with [Foundational API Guide](user-guide/index.html).
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## See Also
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-[BarcodeScanner API Reference](api-reference/barcode-scanner.html)
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-[Foundational API Reference](api-reference/index.html)
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# Release Notes for Dynamsoft Barcode Reader JavaScript SDK
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## 11.4.2000 (03/24/2026)
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### ⚠️ Important Change: Foundational API Becomes Primary
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Starting with this release, the **Foundational API** (`CaptureVisionRouter` and related classes) is officially the primary and recommended integration path for DBR-JS. `BarcodeScanner` transitions to the role of an **officially maintained simplified wrapper** — still fully supported throughout the v11 lifecycle.
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**What this means in practice:**
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-**v11 (current)** – No breaking changes. `BarcodeScanner` continues to work exactly as before and will receive maintenance updates and bug fixes for the entire v11 lifecycle.
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-**v12 (future)** – `BarcodeScanner` will no longer be bundled as part of the main `dynamsoft-barcode-reader-bundle` package. It will be distributed separately.
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**Recommended action for new projects:** Build on the Foundational API to ensure forward compatibility. See the [Foundational API Guide](../user-guide/foundational-api.html) for a full walkthrough.
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**Existing projects using `BarcodeScanner`:** No action required for v11. When v12 is released, a migration guide will be provided.
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### Highlights
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#### AI-Powered Barcode Detection and Decoding
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-**PDF417 Localization Model** – Introduces the [`PDF417Localization`]({{ site.dcvb_parameters }}barcode-reader-task-settings/localization-modes.html#modelnamearray) neural network model for improved detection of PDF417 barcodes, especially under challenging conditions.
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-**Code39/ITF Decoding Model** – Adds the [`Code39ITFDecoder`]({{ site.dcvb_parameters }}barcode-reader-task-settings/deblur-modes.html#modelnamearray) model for enhanced decoding of Code 39 and ITF barcodes under blurred or low-resolution conditions.
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-**Deblur Models for 2D Barcodes** – Adds the [`DataMatrixQRCodeDeblur`]({{ site.dcvb_parameters }}barcode-reader-task-settings/deblur-modes.html#modelnamearray) and [`PDF417Deblur`]({{ site.dcvb_parameters }}barcode-reader-task-settings/deblur-modes.html#modelnamearray) models to provide more effective recovery from motion and focus blur for DataMatrix, QR Code, and PDF417 barcodes.
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#### ECI (Extended Channel Interpretation) Support
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-**ECI Information Return** – Adds support for retrieving Extended Channel Interpretation (ECI) data from barcodes. The new [`ECISegment`]({{ site.js_api }}/interfaceseci-segment.html) interface, along with the `eciSegments` property in the [`BarcodeResultItem`]({{ site.js_api }}/interfacesbarcode-result-item.html#ecisegments) and [`DecodedBarcodeElement`]({{ site.js_api }}/interfacesdecoded-barcode-element.html#ecisegments) interfaces, enables access to character encoding information embedded in barcodes.
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-**ECI-Based Text Interpretation** – Adds support for interpreting ECI segments during barcode decoding, improving compatibility with international character sets.
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#### Performance Improvements
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-**On-Demand Model Loading** – Implements lazy loading for AI models, reducing initialization time by loading models only when first needed.
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-**Smart Model Selection** – Models are now loaded based on configured barcode formats, minimizing memory usage by excluding unused models.
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-**Improved Confidence Scoring** – Enhances confidence score calculation for results from neural network models, providing more accurate quality indicators.
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-**DPM Barcode Optimization** – Improves recognition rate for Direct Part Marking (DPM) barcodes commonly used in industrial and manufacturing environments.
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### New
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- Added [`BarcodeZoneWidthToHeightRatioRangeArray`]({{ site.dcvb_parameters }}barcode-format-specification/barcode-zone-width-to-height-ratio-range-array.html) parameter for filtering barcodes based on aspect ratio constraints.
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- Added [`SetResultCrossVerificationCriteria()`]({{ site.dcvb_js_api }}utility/multi-frame-result-cross-filter.html#setresultcrossverificationcriteria) and [`GetResultCrossVerificationCriteria()`]({{ site.dcvb_js_api }}utility/multi-frame-result-cross-filter.html#getresultcrossverificationcriteria) methods to `MultiFrameResultCrossFilter` for configurable multi-frame result verification.
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- Added [`AuxiliaryRegionElement`]({{ site.dcvb_js_api }}core/intermediate-results/auxiliary-region-element.html) class for representing additional region information detected during processing (e.g., MRZ (Machine Readable Zone), portrait zones).
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- Added `ROET_AUXILIARY_REGION` to [`RegionObjectElementType`]({{ site.dcvb_js_api }}core/enum-region-object-element-type.html) enumeration for the new `AuxiliaryRegionElement` class.
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### Changed
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- Barcode text encoding fallback changed from UTF-8 to ISO-8859-1 when no ECI information is present in the barcode.
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- Updated default value of `compensation` parameter in [`convertToBinaryLocal()`]({{ site.dcvb_js_api }}utility/image-processor.html#converttobinarylocal) from 0 to 10.
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-[`convertToBinaryGlobal()`]({{ site.dcvb_js_api }}utility/image-processor.html#converttobinaryglobal) and [`convertToBinaryLocal()`]({{ site.dcvb_js_api }}utility/image-processor.html#converttobinarylocal) of `ImageProcessor` class now support color, binary and grayscale images as input.
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- Parser resource files (.json) have been consolidated into encrypted .data files for improved security and simplified distribution:
<!-- - In some rare cases (such as some restricted areas), you might not be able to access the CDN. If this happens, you can use the following files for the test.
However, please **DO NOT** use `download2.dynamsoft.com` resources in a production application as they are for temporary testing purposes only. Instead, you can try hosting the SDK yourself. -->
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- In frameworks like React, Vue and Angular, you may want to add the package as a dependency.
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```sh
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npm i dynamsoft-barcode-reader-bundle@11.2.4000 -E
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npm i dynamsoft-barcode-reader-bundle@11.4.2000 -E
NOTE that in frameworks, you need to [specify the location of the engine files](#2-optional-specify-the-location-of-the-engine-files).
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- From npm
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```sh
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npm i dynamsoft-barcode-reader-bundle@11.4.2000 -E
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```
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The resources are located at the path `node_modules/<pkg>`, without `@<version>`. You must copy "dynamsoft-xxx" packages elsewhere and add `@<version>`. The `<version>` can be obtained from `package.json` of each package. Another thing to do is to [specify the engineResourcePaths](#2-optional-specify-the-location-of-the-engine-files) so that the SDK can correctly locate the resources.
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The preset templates have many more settings that can be customized to suit your use case best. If you [download the SDK from Dynamsoft website](https://www.dynamsoft.com/barcode-reader/downloads/1000003-confirmation/), you can find the templates under
3. Confirm the installation by checking the `package.json`. You should see:
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"dependencies": {
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"dynamsoft-barcode-reader-bundle": "11.2.4000"
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"dynamsoft-barcode-reader-bundle": "11.4.2000"
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}
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}
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```
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Notice that there is no `^` before `11.2.4000`. No `^` indicates an exact version, ensuring stability and avoids automatic upgrades even without `package-lock.json`.
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Notice that there is no `^` before `11.4.2000`. No `^` indicates an exact version, ensuring stability and avoids automatic upgrades even without `package-lock.json`.
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While we keep the SDK's external interface relatively stable, the SDK's internal communication often change with each new version. These changes can potentially lead to compatibility issues with `engineResourcePaths` settings. To prevent any unexpected difficulties and surprises, it's essential to use the exact version of the SDK.
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