Forced Decision methods for the JavaScript (Node) SDK prior to v6
These methods help test and debug various flows of your client applications by forcing users into a specific variation.
The JavaScript Node SDK checks forced decisions before making any decisions. If a matching item is found for the requested flag, the SDK returns the forced decision immediately (audience conditions and traffic allocations are ignored) before making normal decisions.
The JavaScript Node SDK checks for forced decisions at the start of each decision process. If a matching forced decision is found, it returns the decision immediately.
- Flag-to-Decision – The SDK checks at the start of any decide call for the given flag.
- Experiment-Rule-to-Decision – The SDK checks at the start of the decision for the given experiment rule of the flag key.
- Delivery-Rule-to-Decision – The SDK checks at the start of the decision for the given delivery rule of the flag key.
Warning You must associate your variations to a flag rule before calling any Forced Decision methods.
On forced decisions, the SDK fires impression events and notifications just like other normal decisions (unless disabled by the disableDecisionEvent option).
Note These forced decisions are not persistent and are cleared when the OptimizelyUserContext is re-initialized.
For information about each method, click on the method name.
OptimizelyDecisionContext
export interface OptimizelyDecisionContext {
flagKey: string;
ruleKey?: string;
}OptimizelyForcedDecision
export interface OptimizelyForcedDecision {
variationKey: string;
}Set forced decision method - setForcedDecision()
Version
4.9.0
Description
Sets a forced decision (variationKey) for a given OptimizelyDecisionContext.
Parameters
This table lists the required and optional parameters for the Javascript SDK.
Parameter | Type | Description |
|---|---|---|
context *required* | Interface | An instance of `OptimizelyDecisionContext` with the required `flagKey` and optional `ruleKey` for the forced decision you want to set. |
decision\ *required* | Interface | An instance of `OptimizelyForcedDecision` with the required `variationKey` for the forced decision you want to set. |
Returns
A boolean value that indicates if setting the forced decision (variationKey) was completed.
Example
See the full Javascript SDK example here.
Get forced decision method - getForcedDecision()
Version
4.9.0
Description
Returns the forced decision (variationKey) for a given OptimizelyDecisionContext. Returns the OptimizelyForcedDecision instance or null if there is no matching item.
Parameters
This table lists the required and optional parameters for the Javascript SDK.
Parameter | Type | Description |
|---|---|---|
context *required* | Interface | An instance of `OptimizelyDecisionContext` with the required `flagKey` and optional `ruleKey` for the forced decision you want to get. |
Returns
A forced decision OptimizelyForcedDecision instance for the context or null if there is no matching item.
Example
See the full Javascript SDK example here.
Remove forced decision method - removeForcedDecision()
Version
4.9.0
Description
Removes the forced decision (variationKey) for a given OptimizelyDecisionContext.
Parameters
This table lists the required and optional parameters for the Javascript SDK.
Parameters | Type | Description |
|---|---|---|
context *required* | struct | An instance of `OptimizelyDecisionContext` with the required `flagKey` and optional `ruleKey` for the forced decision you want to remove. |
Returns
A success/failure boolean status if the forced decision (variationKey) was removed.
Example
See the full Javascript SDK example here.
Remove all forced decisions method - removeAllForcedDecisions()
Version
4.9.0
Description
Removes all forced decisions (variationKey) for the user context.
Parameters
This table lists the required and optional parameters for the Javascript SDK.
Parameters | Type | Description |
|---|---|---|
None | N/A | N/A |
Returns
A success/failure boolean status.
Example
See the full Javascript SDK example here.
Full Code Example
const { createInstance } = require('@optimizely/optimizely-sdk');
const optimizely = createInstance({
sdkKey: '<YOUR_SDK_KEY>'// Provide the sdkKey of your desired environment here
});
if (optimizely) {
optimizely.onReady().then(({ success, reason }) => {
if (!success) {
throw new Error(reason);
}
const attributes = { logged_in: true };
const user = optimizely.createUserContext('user123', attributes);
if (!user) {
throw new Error('failed to create user context');
}
let result, decision, forcedDecision;
// set a forced decision for a flag
result = user.setForcedDecision({flagKey: 'flag-1'}, {variationKey: 'off'});
decision = user.decide('flag-1');
// set a forced decision for an ab-test rule
result = user.setForcedDecision({flagKey: 'flag-2', ruleKey: 'ab-test-1'}, {variationKey: 'variation-b'});
decision = user.decide('flag-2');
// set a forced variation for a delivery rule
result = user.setForcedDecision({flagKey: 'flag-3', ruleKey: 'delivery-1'}, {variationKey: 'on'});
decision = user.decide('flag-3');
// get forced variations
forcedDecision = user.getForcedDecision({flagKey: 'flag-2'});
// remove forced variations
result = user.removeForcedDecision({flagKey: 'flag-2', ruleKey: 'ab-test-1'});
user.removeAllForcedDecisions();
user.decideAll();
}).catch((err) => {
console.log(err);
// handle error
});
} else {
// handle instantiation error
}