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docs: add docs for impression data (#1328)
* docs: add docs for impression data * fix: update wording * Update website/docs/advanced/impression_data.md Co-authored-by: Thomas Heartman <thomas@getunleash.ai> * Update website/docs/advanced/impression_data.md Co-authored-by: Thomas Heartman <thomas@getunleash.ai> * docs: use hyphen instead of underscore in file name and title/slug We've been very inconsistent with our use of separators previously (we should try and find a standard). Hyphens are most common online, so I've switched to that instead. * docs: use syntax highlighting for shell commands * docs: start outlining impression data restructure. * docs: Add impression data info to API: create toggles * docs: Add impression data row to compatibility matrix * docs: restructures the impression data reference doc. * chore: remove question callout in source material * docs: add redirect for `impression_data` -> 'impression-data' * docs: Add sdk availability to availability note * chore: Fix broken doc paths. Co-authored-by: Thomas Heartman <thomas@getunleash.ai>
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website/docs/advanced/impression-data.md
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website/docs/advanced/impression-data.md
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---
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title: Impression data
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---
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:::info Availability
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The impression data feature was introduced in **Unleash 4.7**. Listening for events requires [an SDK that supports impression data events](../sdks/index.md#server-side-sdk-compatibility-table). Currently, it's only supported in the [Unleash Proxy client](../sdks/proxy-javascript.md) and [React Proxy client](../sdks/proxy-react.md).
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:::
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Unleash can provide you with **impression data** about the toggles in your application. Impression data contains information about a specific feature toggle activation check: The client SDK will emit an **impression event** whenever it calls `isEnabled` or `getVariant`.
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Impression data was designed to make it easier for you to **collect analytics data**, **perform A/B tests**, and **enrich experiments** in your applications. It contains information about the feature toggle and the related [Unleash Context](../user_guide/unleash-context.md).
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Impression data is **opt-in on a per-toggle basis**. Unleash will not emit impression events for toggles not marked as such. Once you've turned impression data on for a toggle, you can start listening for impression events in your client SDK.
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## Impression event data
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There's two types of impression events you can listen for:
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- [`isEnabled` events](#example-isenabled)
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- [`getVariant` events](#example-getvariant)
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The `getVariant` event contains all the information found in an `isEnabled` event in addition to extra data that's only relevant to `getVariant` calls.
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This table describes all the properties on the impression events:
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| Property name | Description | Event type |
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|---------------|--------------------------------------------------------------------------------------|--------------------------|
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| `eventType` | The type of the event: `isEnabled` or `getVariant` | All |
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| `eventId` | A globally unique id (GUID) assigned to this event. | All |
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| `context` | A representation of the current [Unleash Context](../user_guide/unleash-context.md). | All |
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| `enabled` | Whether the toggle was enabled or not at when the client made the request. | All |
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| `featureName` | The name of the feature toggle. | All |
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| `variant` | The name of the active variant | `getVariant` events only |
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### Example `isEnabled` event {#example-isenabled}
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```js
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{
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eventType: 'isEnabled',
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eventId: '84b41a43-5ba0-47d8-b21f-a60a319607b0',
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context: {
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sessionId: 54085233,
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appName: 'my-webapp',
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environment: 'default'
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},
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enabled: true,
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featureName: 'my-feature-toggle',
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}
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```
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### Example `getVariant` event {#example-getvariant}
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```js
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{
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eventType: 'getVariant',
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eventId: '84b41a43-5ba0-47d8-b21f-a60a319607b0',
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context: {
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sessionId: 54085233,
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appName: 'my-webapp',
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environment: 'default'
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},
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enabled: true,
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featureName: 'my-feature-toggle',
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variant: 'variantA'
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}
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```
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## Enabling impression data
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Impression data is strictly an **opt-in** feature and must be enabled on a **per-toggle basis**.
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You can enable and disable it both when you create a toggle and when you edit a toggle.
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You can enable impression data via the impression data toggle in the admin UI's toggle creation form. You can also go via the [the API, using the `impressionData` option](../api/admin/feature-toggles-api-v2.md#create-toggle).
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## Example setup
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:::caution
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This functionality is currently only supported in the [Unleash Proxy client](../sdks/proxy-javascript.md) and [React Proxy client](../sdks/proxy-react.md).
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:::
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The exact setup will vary depending on your [client SDK](../sdks/index.md). The below example configures the [Unleash Proxy client](/sdks/proxy-javascript) to listen for impression events and log them to the console. If "my-feature-toggle" is configured to emit impression data, then it will trigger an impression event as soon as Unleash is ready.
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```js
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const unleash = new UnleashClient({
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url: 'https://eu.unleash-hosted.com/hosted/proxy',
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clientKey: 'your-proxy-key',
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appName: 'my-webapp',
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});
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unleash.start();
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unleash.on("ready", () => {
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unleash.isEnabled("my-feature-toggle");
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})
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unleash.on("impression", (event) => {
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// Capture the event here and pass it internal data lake or analytics provider
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console.log(event);
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})
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```
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@ -146,10 +146,23 @@ This endpoint will return all feature toggles and high level environment details
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This endpoint will accept HTTP POST request to create a new feature toggle for a given _projectId_
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**Toggle options**
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This endpoint accepts the following toggle options:
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| Property name | Required | Description | Example value |
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|------------------|----------|--------------------------------------------------------------------------------------------------------------|-------------------------|
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| `name` | Yes | The name of the feature toggle. | `"my-feature-toggle"` |
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| `description` | No | The feature toggle's description. Defaults to an empty string. | `"Turn my feature on!"` |
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| `impressionData` | No | Whether to enable [impression data](../../advanced/impression-data.md) for this toggle. Defaults to `false.` | `true` |
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| `type` | No | The [type of toggle](../../advanced/feature-toggle-types.md) you want to create. Defaults to `"release"` | `"release"` |
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**Example Query**
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```sh
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echo '{"name": "demo2", "description": "A new feature toggle"}' | http POST http://localhost:4242/api/admin/projects/default/features Authorization:$KEY`
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```bash
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echo '{"name": "demo2", "description": "A new feature toggle"}' | \
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http POST http://localhost:4242/api/admin/projects/default/features Authorization:$KEY`
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```
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@ -598,4 +611,3 @@ http PATCH http://localhost:4242/api/admin/projects/default/features/demo/varian
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]
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}
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```
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@ -50,54 +50,55 @@ If you see an item marked with a ❌ that you would find useful, feel free to re
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| Capability | [Java](/sdks/java_sdk) | [Node.js](/sdks/node_sdk) | [Go](/sdks/go_sdk) | [Python](/sdks/python_sdk) | [Ruby](/sdks/ruby_sdk) | [.NET](/sdks/dot_net_sdk) | [PHP](/sdks/php_sdk) | [Rust](https://github.com/unleash/unleash-client-rust) | [Unleash Proxy Server](unleash-proxy.md) |
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|---------------------------------------------------------------------------------------------------|:----------------------:|:-------------------------:|:------------------:|:--------------------------:|:----------------------:|:-------------------------:|:--------------------:|:-------------------------------------------------------:|:----------------------------------------:|
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| **Category: Initialization** | | | | | | | | |
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| Async initialization | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | N/A
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| Can block until synchronized | ✅ | ✅ | ⭕ | ⭕ | ⭕ | ✅ | ⭕ | ⭕ | N/A
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| Default refresh interval | 10s | 15s | 15s | 15s | 15s | 30s | 30s | 15s | 5s
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| Default metrics interval | 60s | 60s | 60s | 60s | 60s | 60s | 30s | 15s | 30s
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| Context provider | ✅ | N/A | N/A | N/A | N/A | ✅ | ✅ | N/A | N/A
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| Global fallback function | ✅ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | N/A
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| Toggle Query: `namePrefix` | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ✅
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| Toggle Query: `tags` | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ✅
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| Toggle Query: `project_name` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | N/A | ⭕ | ✅
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| **Category: Custom Headers** | | | | | | | | |
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| static | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | N/A
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| function | ✅ | ✅ | ⭕ | ✅ | ⭕ | ✅ | ⭕ | ⭕ | N/A
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| **Category: Built-in strategies** | | | | | | | | |
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| [Standard](../user_guide/activation_strategy#standard) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| [Gradual rollout](../user_guide/activation_strategy#gradual-rollout) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| [Gradual rollout: custom stickiness](../user_guide/activation_strategy#customize-stickiness-beta) | ✅ | ✅ | ⭕ | ✅ | ✅ | ✅ | ✅ | ⭕ | ✅
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| [UserID](../user_guide/activation_strategy#userids) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| [IP](../user_guide/activation_strategy#ips) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| [IP](../user_guide/activation_strategy#ips): CIDR syntax | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | ⭕ | ✅ | ✅
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| [Hostname](../user_guide/activation_strategy#hostnames) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| **Category: [Custom strategies](../advanced/custom_activation_strategy)** | | | | | | | | |
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| Basic support | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| **Category: [Strategy constraints](../advanced/strategy_constraints)** | | | | | | | | |
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| Basic support (`IN`, `NOT_IN` operators) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| **Category: [Unleash Context](../user_guide/unleash_context)** | | | | | | | | |
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| Static fields (`environment`, `appName`) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| Defined fields | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| Custom properties | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| **Category: [`isEnabled`](../client-specification#implementation-of-isenabled)** | | | | | | | | |
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| Can take context | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| Override fallback value | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| Fallback function | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | ⭕ | ⭕ | ✅
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| **Category: [Variants](../advanced/toggle_variants)** | | | | | | | | |
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| Basic support | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| Custom fallback variant | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | ✅
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| Custom weight | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | ✅
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| [Custom stickiness (beta)](../advanced/stickiness#custom-stickiness-beta) | ✅ | ✅ | ⭕ | ✅ | ✅ | ✅ | ✅ | ⭕ | ✅
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| **Category: Local backup** | | | | | | | | |
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| File based backup | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | ✅
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| **Category: Usage metrics** | | | | | | | | |
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| Can disable metrics | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| Client registration | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| Basic usage metrics (yes/no) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅
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| **Category: Bootstrap (beta)** | | | | | | | | |
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| Bootstrap from file | ✅ | ✅ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕
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| Custom Bootstrap implementation | ✅ | ✅ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕
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|---------------------------------------------------------------------------------------------------|:----------------------:|:-------------------------:|:------------------:|:--------------------------:|:----------------------:|:-------------------------:|:--------------------:|:------------------------------------------------------:|:----------------------------------------:|
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| **Category: Initialization** | | | | | | | | | |
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| Async initialization | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | N/A |
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| Can block until synchronized | ✅ | ✅ | ⭕ | ⭕ | ⭕ | ✅ | ⭕ | ⭕ | N/A |
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| Default refresh interval | 10s | 15s | 15s | 15s | 15s | 30s | 30s | 15s | 5s |
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| Default metrics interval | 60s | 60s | 60s | 60s | 60s | 60s | 30s | 15s | 30s |
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| Context provider | ✅ | N/A | N/A | N/A | N/A | ✅ | ✅ | N/A | N/A |
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| Global fallback function | ✅ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | N/A |
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| Toggle Query: `namePrefix` | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | |
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| Toggle Query: `tags` | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | |
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| Toggle Query: `project_name` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | N/A | ⭕ | |
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| **Category: Custom Headers** | | | | | | | | | |
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| static | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | N/A |
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| function | ✅ | ✅ | ⭕ | ✅ | ⭕ | ✅ | ⭕ | ⭕ | N/A |
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| **Category: Built-in strategies** | | | | | | | | | |
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| [Standard](../user_guide/activation_strategy#standard) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| [Gradual rollout](../user_guide/activation_strategy#gradual-rollout) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| [Gradual rollout: custom stickiness](../user_guide/activation_strategy#customize-stickiness-beta) | ✅ | ✅ | ⭕ | ✅ | ✅ | ✅ | ✅ | ⭕ | |
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| [UserID](../user_guide/activation_strategy#userids) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| [IP](../user_guide/activation_strategy#ips) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| [IP](../user_guide/activation_strategy#ips): CIDR syntax | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | ⭕ | ✅ | |
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| [Hostname](../user_guide/activation_strategy#hostnames) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| **Category: [Custom strategies](../advanced/custom_activation_strategy)** | | | | | | | | | |
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| Basic support | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| **Category: [Strategy constraints](../advanced/strategy_constraints)** | | | | | | | | | |
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| Basic support (`IN`, `NOT_IN` operators) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| **Category: [Unleash Context](../user_guide/unleash_context)** | | | | | | | | | |
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| Static fields (`environment`, `appName`) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| Defined fields | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| Custom properties | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| **Category: [`isEnabled`](../client-specification#implementation-of-isenabled)** | | | | | | | | | |
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| Can take context | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| Override fallback value | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| Fallback function | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | ⭕ | ⭕ | |
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| **Category: [Variants](../advanced/toggle_variants)** | | | | | | | | | |
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| Basic support | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| Custom fallback variant | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | |
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| Custom weight | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | |
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| [Custom stickiness (beta)](../advanced/stickiness#custom-stickiness-beta) | ✅ | ✅ | ⭕ | ✅ | ✅ | ✅ | ✅ | ⭕ | |
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| **Category: Local backup** | | | | | | | | | |
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| File based backup | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ⭕ | |
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| **Category: Usage metrics** | | | | | | | | | |
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| Can disable metrics | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| Client registration | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| Basic usage metrics (yes/no) | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |
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| [Impression data](../advanced/impression-data.md) | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | N/A |
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| **Category: Bootstrap (beta)** | | | | | | | | | |
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| Bootstrap from file | ✅ | ✅ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | |
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| Custom Bootstrap implementation | ✅ | ✅ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | ⭕ | |
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## Community SDKs ❤️ {#community-sdks}
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@ -160,6 +160,10 @@ module.exports = {
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to: '/user_guide/activation_strategy',
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from: '/user_guide/control_rollout',
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},
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{
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from: '/advanced/impression_data',
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to: '/advanced/impression-data',
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}
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],
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createRedirects: function (toPath) {
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if (
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@ -246,6 +246,7 @@ module.exports = {
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'user_guide/activation_strategy',
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'advanced/archived_toggles',
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'advanced/audit_log',
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'advanced/impression-data',
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'advanced/custom_activation_strategy',
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'user_guide/environments',
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'advanced/feature_toggle_types',
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BIN
website/static/img/create_feat_impression.png
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website/static/img/create_feat_impression.png
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After Width: | Height: | Size: 586 KiB |
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Block a user