unleash-proxy-client - npm Package Compare versions

Comparing version 3.2.0 to 3.3.0-alpha.1

build/cjs/index.d.ts

@@ -28,2 +28,3 @@ import { TinyEmitter } from 'tiny-emitter';
     fetch?: any;
+    createAbortController?: () => AbortController;
     bootstrap?: IToggle[];
@@ -58,2 +59,3 @@ bootstrapOverride?: boolean;
     SENT: string;
+    RECOVERED: string;
 };
@@ -74,2 +76,4 @@ export declare const resolveFetch: () => typeof fetch | undefined;
     private fetch;
+    private createAbortController?;
+    private abortController?;
     private bootstrap?;
@@ -83,3 +87,4 @@ private bootstrapOverride;
     private started;
-    constructor({ storageProvider, url, clientKey, disableRefresh, refreshInterval, metricsInterval, disableMetrics, appName, environment, context, fetch, bootstrap, bootstrapOverride, headerName, customHeaders, impressionDataAll, usePOSTrequests, }: IConfig);
+    private sdkState;
+    constructor({ storageProvider, url, clientKey, disableRefresh, refreshInterval, metricsInterval, disableMetrics, appName, environment, context, fetch, createAbortController, bootstrap, bootstrapOverride, headerName, customHeaders, impressionDataAll, usePOSTrequests, }: IConfig);
     getAllToggles(): IToggle[];
@@ -86,0 +91,0 @@ isEnabled(toggleName: string): boolean;

build/main.esm.js

@@ -1,2 +0,2 @@
-var t=function(e,n){return t=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var n in e)Object.prototype.hasOwnProperty.call(e,n)&&(t[n]=e[n])},t(e,n)};var e=function(){return e=Object.assign||function(t){for(var e,n=1,r=arguments.length;n<r;n++)for(var i in e=arguments[n])Object.prototype.hasOwnProperty.call(e,i)&&(t[i]=e[i]);return t},e.apply(this,arguments)};function n(t,e,n,r){return new(n||(n=Promise))((function(i,o){function s(t){try{c(r.next(t))}catch(t){o(t)}}function a(t){try{c(r.throw(t))}catch(t){o(t)}}function c(t){var e;t.done?i(t.value):(e=t.value,e instanceof n?e:new n((function(t){t(e)}))).then(s,a)}c((r=r.apply(t,e||[])).next())}))}function r(t,e){var n,r,i,o,s={label:0,sent:function(){if(1&i[0])throw i[1];return i[1]},trys:[],ops:[]};return o={next:a(0),throw:a(1),return:a(2)},"function"==typeof Symbol&&(o[Symbol.iterator]=function(){return this}),o;function a(a){return function(c){return function(a){if(n)throw 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See https://github.com/uuidjs/uuid#getrandomvalues-not-supported");return p(f)}const v=[];for(let t=0;t<256;++t)v.push((t+256).toString(16).slice(1));var m={randomUUID:"undefined"!=typeof crypto&&crypto.randomUUID&&crypto.randomUUID.bind(crypto)};function y(t,e,n){if(m.randomUUID&&!e&&!t)return m.randomUUID();const r=(t=t||{}).random||(t.rng||d)();if(r[6]=15&r[6]|64,r[8]=63&r[8]|128,e){n=n||0;for(let t=0;t<16;++t)e[n+t]=r[t];return e}return function(t,e=0){return v[t[e+0]]+v[t[e+1]]+v[t[e+2]]+v[t[e+3]]+"-"+v[t[e+4]]+v[t[e+5]]+"-"+v[t[e+6]]+v[t[e+7]]+"-"+v[t[e+8]]+v[t[e+9]]+"-"+v[t[e+10]]+v[t[e+11]]+v[t[e+12]]+v[t[e+13]]+v[t[e+14]]+v[t[e+15]]}(r)}var g=function(){function t(){}return t.prototype.generateEventId=function(){return y()},t.prototype.createImpressionEvent=function(t,n,r,i,o,s){var a=this.createBaseEvent(t,n,r,i,o);return s?e(e({},a),{variant:s}):a},t.prototype.createBaseEvent=function(t,e,n,r,i){return{eventType:r,eventId:this.generateEventId(),context:t,enabled:e,featureName:n,impressionData:i}},t}(),b=["userId","sessionId","remoteAddress"],w={INIT:"initialized",ERROR:"error",READY:"ready",UPDATE:"update",IMPRESSION:"impression",SENT:"sent"},E="isEnabled",I="getVariant",x={name:"disabled",enabled:!1,feature_enabled:!1},R="repo",S=function(){try{if("undefined"!=typeof window&&"fetch"in window)return fetch.bind(window);if("fetch"in globalThis)return fetch.bind(globalThis)}catch(t){console.error('Unleash failed to resolve "fetch"',t)}},T=function(i){function o(t){var n=t.storageProvider,r=t.url,o=t.clientKey,s=t.disableRefresh,a=void 0!==s&&s,c=t.refreshInterval,p=void 0===c?30:c,f=t.metricsInterval,d=void 0===f?30:f,v=t.disableMetrics,m=void 0!==v&&v,y=t.appName,b=t.environment,E=void 0===b?"default":b,I=t.context,x=t.fetch,R=void 0===x?S():x,T=t.bootstrap,O=t.bootstrapOverride,N=void 0===O||O,k=t.headerName,D=void 0===k?"Authorization":k,U=t.customHeaders,P=void 0===U?{}:U,A=t.impressionDataAll,j=void 0!==A&&A,H=t.usePOSTrequests,M=void 0!==H&&H,_=i.call(this)||this;if(_.toggles=[],_.etag="",_.readyEventEmitted=!1,_.usePOSTrequests=!1,_.started=!1,!r)throw new Error("url is required");if(!o)throw new Error("clientKey is required");if(!y)throw new Error("appName is required.");return _.eventsHandler=new g,_.impressionDataAll=j,_.toggles=T&&T.length>0?T:[],_.url=r instanceof URL?r:new URL(r),_.clientKey=o,_.headerName=D,_.customHeaders=P,_.storage=n||("undefined"!=typeof window?new l:new h),_.refreshInterval=a?0:1e3*p,_.context=e({appName:y,environment:E},I),_.usePOSTrequests=M,_.ready=new Promise((function(t){_.init().then(t).catch((function(e){console.error(e),_.emit(w.ERROR,e),t()}))})),R||console.error('Unleash: You must either provide your own "fetch" implementation or run in an environment where "fetch" is available.'),_.fetch=R,_.bootstrap=T&&T.length>0?T:void 0,_.bootstrapOverride=N,_.metrics=new u({onError:_.emit.bind(_,w.ERROR),onSent:_.emit.bind(_,w.SENT),appName:y,metricsInterval:d,disableMetrics:m,url:_.url,clientKey:o,fetch:R,headerName:D,customHeaders:P}),_}return function(e,n){if("function"!=typeof n&&null!==n)throw new TypeError("Class extends value "+String(n)+" is not a constructor or null");function r(){this.constructor=e}t(e,n),e.prototype=null===n?Object.create(n):(r.prototype=n.prototype,new r)}(o,i),o.prototype.getAllToggles=function(){return function(t,e,n){if(n||2===arguments.length)for(var r,i=0,o=e.length;i<o;i++)!r&&i in e||(r||(r=Array.prototype.slice.call(e,0,i)),r[i]=e[i]);return t.concat(r||Array.prototype.slice.call(e))}([],this.toggles,!0)},o.prototype.isEnabled=function(t){var e,n=this.toggles.find((function(e){return e.name===t})),r=!!n&&n.enabled;if(this.metrics.count(t,r),(null==n?void 0:n.impressionData)||this.impressionDataAll){var i=this.eventsHandler.createImpressionEvent(this.context,r,t,E,null!==(e=null==n?void 0:n.impressionData)&&void 0!==e?e:void 0);this.emit(w.IMPRESSION,i)}return r},o.prototype.getVariant=function(t){var n,r=this.toggles.find((function(e){return e.name===t})),i=(null==r?void 0:r.enabled)||!1,o=r?r.variant:x;if(o.name&&this.metrics.countVariant(t,o.name),this.metrics.count(t,i),(null==r?void 0:r.impressionData)||this.impressionDataAll){var s=this.eventsHandler.createImpressionEvent(this.context,i,t,I,null!==(n=null==r?void 0:r.impressionData)&&void 0!==n?n:void 0,o.name);this.emit(w.IMPRESSION,s)}return e(e({},o),{feature_enabled:i})},o.prototype.updateContext=function(t){return n(this,void 0,void 0,(function(){var n,i=this;return r(this,(function(r){switch(r.label){case 0:return(t.appName||t.environment)&&console.warn("appName and environment are static. 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+var t=function(e,r){return t=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,e){t.__proto__=e}||function(t,e){for(var r in e)Object.prototype.hasOwnProperty.call(e,r)&&(t[r]=e[r])},t(e,r)};var e=function(){return e=Object.assign||function(t){for(var e,r=1,n=arguments.length;r<n;r++)for(var o in e=arguments[r])Object.prototype.hasOwnProperty.call(e,o)&&(t[o]=e[o]);return t},e.apply(this,arguments)};function r(t,e,r,n){return new(r||(r=Promise))((function(o,i){function s(t){try{c(n.next(t))}catch(t){i(t)}}function a(t){try{c(n.throw(t))}catch(t){i(t)}}function c(t){var e;t.done?o(t.value):(e=t.value,e instanceof r?e:new r((function(t){t(e)}))).then(s,a)}c((n=n.apply(t,e||[])).next())}))}function n(t,e){var r,n,o,i,s={label:0,sent:function(){if(1&o[0])throw o[1];return o[1]},trys:[],ops:[]};return i={next:a(0),throw:a(1),return:a(2)},"function"==typeof Symbol&&(i[Symbol.iterator]=function(){return this}),i;function a(a){return function(c){return function(a){if(r)throw 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 //# sourceMappingURL=main.esm.js.map

build/main.min.js

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s?r(r({},a),{variant:s}):a},t.prototype.createBaseEvent=function(t,e,r,n,o){return{eventType:n,eventId:this.generateEventId(),context:t,enabled:e,featureName:r,impressionData:o}},t}(),w=["userId","sessionId","remoteAddress"],E={INIT:"initialized",ERROR:"error",READY:"ready",UPDATE:"update",IMPRESSION:"impression",SENT:"sent",RECOVERED:"recovered"},I="isEnabled",S="getVariant",x={name:"disabled",enabled:!1,feature_enabled:!1},R="repo",T=function(){try{if("undefined"!=typeof window&&"fetch"in window)return fetch.bind(window);if("fetch"in globalThis)return fetch.bind(globalThis)}catch(t){console.error('Unleash failed to resolve "fetch"',t)}},k=function(t){function i(e){var n=e.storageProvider,o=e.url,i=e.clientKey,s=e.disableRefresh,a=void 0!==s&&s,c=e.refreshInterval,u=void 0===c?30:c,p=e.metricsInterval,d=void 0===p?30:p,v=e.disableMetrics,m=void 0!==v&&v,y=e.appName,g=e.environment,w=void 0===g?"default":g,I=e.context,S=e.fetch,x=void 0===S?T():S,R=e.createAbortController,k=void 0===R?function(){try{if("undefined"!=typeof window&&"AbortController"in window)return function(){return new window.AbortController};if("fetch"in globalThis)return function(){return new globalThis.AbortController}}catch(t){console.error('Unleash failed to resolve "AbortController" factory',t)}}():R,O=e.bootstrap,N=e.bootstrapOverride,A=void 0===N||N,D=e.headerName,U=void 0===D?"Authorization":D,C=e.customHeaders,P=void 0===C?{}:C,j=e.impressionDataAll,H=void 0!==j&&j,M=e.usePOSTrequests,_=void 0!==M&&M,K=t.call(this)||this;if(K.toggles=[],K.etag="",K.readyEventEmitted=!1,K.usePOSTrequests=!1,K.started=!1,!o)throw new Error("url is required");if(!i)throw new Error("clientKey is required");if(!y)throw new Error("appName is required.");return K.eventsHandler=new b,K.impressionDataAll=H,K.toggles=O&&O.length>0?O:[],K.url=o instanceof URL?o:new URL(o),K.clientKey=i,K.headerName=U,K.customHeaders=P,K.storage=n||("undefined"!=typeof window?new f:new h),K.refreshInterval=a?0:1e3*u,K.context=r({appName:y,environment:w},I),K.usePOSTrequests=_,K.sdkState="initializing",K.ready=new Promise((function(t){K.init().then(t).catch((function(e){console.error(e),K.sdkState="error",K.emit(E.ERROR,e),t()}))})),x||console.error('Unleash: You must either provide your own "fetch" implementation or run in an environment where "fetch" is available.'),k||console.error('Unleash: You must either provide your own "AbortController" implementation or run in an environment where "AbortController" is available.'),K.fetch=x,K.createAbortController=k,K.bootstrap=O&&O.length>0?O:void 0,K.bootstrapOverride=A,K.metrics=new l({onError:K.emit.bind(K,E.ERROR),onSent:K.emit.bind(K,E.SENT),appName:y,metricsInterval:d,disableMetrics:m,url:K.url,clientKey:i,fetch:x,headerName:U,customHeaders:P}),K}return function(t,r){if("function"!=typeof r&&null!==r)throw new TypeError("Class extends value "+String(r)+" is not a constructor or null");function n(){this.constructor=t}e(t,r),t.prototype=null===r?Object.create(r):(n.prototype=r.prototype,new n)}(i,t),i.prototype.getAllToggles=function(){return function(t,e,r){if(r||2===arguments.length)for(var n,o=0,i=e.length;o<i;o++)!n&&o in e||(n||(n=Array.prototype.slice.call(e,0,o)),n[o]=e[o]);return t.concat(n||Array.prototype.slice.call(e))}([],this.toggles,!0)},i.prototype.isEnabled=function(t){var e,r=this.toggles.find((function(e){return e.name===t})),n=!!r&&r.enabled;if(this.metrics.count(t,n),(null==r?void 0:r.impressionData)||this.impressionDataAll){var o=this.eventsHandler.createImpressionEvent(this.context,n,t,I,null!==(e=null==r?void 0:r.impressionData)&&void 0!==e?e:void 0);this.emit(E.IMPRESSION,o)}return n},i.prototype.getVariant=function(t){var e,n=this.toggles.find((function(e){return e.name===t})),o=(null==n?void 0:n.enabled)||!1,i=n?n.variant:x;if(i.name&&this.metrics.countVariant(t,i.name),this.metrics.count(t,o),(null==n?void 0:n.impressionData)||this.impressionDataAll){var s=this.eventsHandler.createImpressionEvent(this.context,o,t,S,null!==(e=null==n?void 0:n.impressionData)&&void 0!==e?e:void 0,i.name);this.emit(E.IMPRESSION,s)}return r(r({},i),{feature_enabled:o})},i.prototype.updateContext=function(t){return n(this,void 0,void 0,(function(){var e,n=this;return o(this,(function(o){switch(o.label){case 0:return(t.appName||t.environment)&&console.warn("appName and environment are static. They can't be updated with updateContext."),e={environment:this.context.environment,appName:this.context.appName,sessionId:this.context.sessionId},this.context=r(r({},e),t),this.timerRef||this.readyEventEmitted?[4,this.fetchToggles()]:[3,2];case 1:return o.sent(),[3,4];case 2:return this.started?[4,new Promise((function(t){var e=function(){n.fetchToggles().then((function(){n.off(E.READY,e),t()}))};n.once(E.READY,e)}))]:[3,4];case 3:o.sent(),o.label=4;case 4:return[2]}}))}))},i.prototype.getContext=function(){return r({},this.context)},i.prototype.setContextField=function(t,e){var n,o;if(w.includes(t))this.context=r(r({},this.context),((n={})[t]=e,n));else{var i=r(r({},this.context.properties),((o={})[t]=e,o));this.context=r(r({},this.context),{properties:i})}this.timerRef&&this.fetchToggles()},i.prototype.init=function(){return n(this,void 0,void 0,(function(){var t,e;return o(this,(function(n){switch(n.label){case 0:return[4,this.resolveSessionId()];case 1:return t=n.sent(),this.context=r({sessionId:t},this.context),e=this,[4,this.storage.get(R)];case 2:return e.toggles=n.sent()||[],!this.bootstrap||!this.bootstrapOverride&&0!==this.toggles.length?[3,4]:[4,this.storage.save(R,this.bootstrap)];case 3:n.sent(),this.toggles=this.bootstrap,this.emit(E.READY),n.label=4;case 4:return this.sdkState="healthy",this.emit(E.INIT),[2]}}))}))},i.prototype.start=function(){return n(this,void 0,void 0,(function(){var t,e=this;return o(this,(function(r){switch(r.label){case 0:return this.started=!0,this.timerRef?(console.error("Unleash SDK has already started, if you want to restart the SDK you should call client.stop() before starting again."),[2]):[4,this.ready];case 1:return r.sent(),this.metrics.start(),t=this.refreshInterval,[4,this.fetchToggles()];case 2:return r.sent(),t>0&&(this.timerRef=setInterval((function(){return e.fetchToggles()}),t)),[2]}}))}))},i.prototype.stop=function(){this.timerRef&&(clearInterval(this.timerRef),this.timerRef=void 0),this.metrics.stop()},i.prototype.resolveSessionId=function(){return n(this,void 0,void 0,(function(){var t;return o(this,(function(e){switch(e.label){case 0:return this.context.sessionId?[2,this.context.sessionId]:[3,1];case 1:return[4,this.storage.get("sessionId")];case 2:return(t=e.sent())?[3,4]:(t=Math.floor(1e9*Math.random()),[4,this.storage.save("sessionId",t)]);case 3:e.sent(),e.label=4;case 4:return[2,t]}}))}))},i.prototype.getHeaders=function(){var t,e=((t={})[this.headerName]=this.clientKey,t.Accept="application/json",t["Content-Type"]="application/json",t["If-None-Match"]=this.etag,t);return Object.entries(this.customHeaders).filter(c).forEach((function(t){var r=t[0],n=t[1];return e[r]=n})),e},i.prototype.storeToggles=function(t){return n(this,void 0,void 0,(function(){return o(this,(function(e){switch(e.label){case 0:return this.toggles=t,this.emit(E.UPDATE),[4,this.storage.save(R,t)];case 1:return e.sent(),[2]}}))}))},i.prototype.fetchToggles=function(){return n(this,void 0,void 0,(function(){var t,e,r,n,i,s,a,u;return o(this,(function(o){switch(o.label){case 0:if(!this.fetch)return[3,9];this.abortController&&this.abortController.abort(),this.abortController=this.createAbortController&&this.createAbortController(),t=this.abortController?this.abortController.signal:void 0,o.label=1;case 1:return o.trys.push([1,7,8,9]),e=this.usePOSTrequests,r=e?this.url:function(t,e){var r=new URL(t.toString());return Object.entries(e).filter(c).forEach((function(t){var e=t[0],n=t[1];"properties"===e&&n?Object.entries(n).filter(c).forEach((function(t){var e=t[0],n=t[1];return r.searchParams.append("properties[".concat(e,"]"),n)})):r.searchParams.append(e,n)})),r}(this.url,this.context),n=e?"POST":"GET",i=e?JSON.stringify({context:this.context}):void 0,[4,this.fetch(r.toString(),{method:n,headers:this.getHeaders(),body:i,signal:t})];case 2:return s=o.sent(),"error"===this.sdkState&&s.status<400&&(this.sdkState="healthy",this.emit(E.RECOVERED)),s.ok&&304!==s.status?(this.etag=s.headers.get("ETag")||"",[4,s.json()]):[3,5];case 3:return a=o.sent(),[4,this.storeToggles(a.toggles)];case 4:return o.sent(),"healthy"!==this.sdkState&&(this.sdkState="healthy"),this.bootstrap||this.readyEventEmitted||(this.emit(E.READY),this.readyEventEmitted=!0),[3,6];case 5:s.ok||304===s.status||(console.error("Unleash: Fetching feature toggles did not have an ok response"),this.sdkState="error",this.emit(E.ERROR,{type:"HttpError",code:s.status})),o.label=6;case 6:return[3,9];case 7:return u=o.sent(),console.error("Unleash: unable to fetch feature toggles",u),this.sdkState="error",this.emit(E.ERROR,u),[3,9];case 8:return this.abortController=null,[7];case 9:return[2]}}))}))},i}(a);t.EVENTS=E,t.InMemoryStorageProvider=h,t.LocalStorageProvider=f,t.UnleashClient=k,t.resolveFetch=T}));
 //# sourceMappingURL=main.min.js.map

package.json

 {
   "name": "unleash-proxy-client",
-  "version": "3.2.0",
+  "version": "3.3.0-alpha.1",
   "description": "A browser client that can be used together with the unleash-proxy.",
@@ -5,0 +5,0 @@ "type": "module",

README.md

@@ -146,2 +146,4 @@ # Unleash Proxy Client for the browser (JS)
 - **update** - emitted every time the Unleash Proxy return a new feature toggle configuration. The SDK will emit this event as part of the initial fetch from the SDK.  
+- **recovered** - emitted when the SDK has recovered from an error. This event will only be emitted if the SDK has previously emitted an error.
+- **sent** - emitted when the SDK has successfully sent metrics to Unleash.
 
@@ -148,0 +150,0 @@ > PS! Please remember that you should always register your event listeners before your call `unleash.start()`. If you register them after you have started the SDK you risk loosing important events.

src/index.test.ts

@@ -600,2 +600,21 @@ import { FetchMock } from 'jest-fetch-mock';
 
+test('Should abort previous request', async () => {
+    fetchMock.mockResponse(JSON.stringify(data));
+    const abortSpy = jest.spyOn(AbortController.prototype, 'abort');
+
+    const config: IConfig = {
+        url: 'http://localhost/test',
+        clientKey: '12',
+        appName: 'web',
+    };
+    const client = new UnleashClient(config);
+    await client.start();
+    client.updateContext({ userId: '123' }); // abort 1
+    client.updateContext({ userId: '456' }); // abort 2
+    await client.updateContext({ userId: '789' });
+
+    expect(abortSpy).toBeCalledTimes(2);
+    abortSpy.mockRestore();
+});
+
 test.each([400, 401, 403, 404, 429, 500, 502, 503])(
@@ -1558,1 +1577,54 @@ 'Should publish error when fetch receives a %d error',
 });
+
+test('Should emit RECOVERED event when sdkStatus is error and status is less than 400', (done) => {
+    const data = { status: 200 }; // replace with the actual data you want to test
+    fetchMock.mockResponseOnce(JSON.stringify(data), { status: 200 });
+
+    const config: IConfig = {
+        url: 'http://localhost/test',
+        clientKey: '12',
+        appName: 'web',
+    };
+
+    const client = new UnleashClient(config);
+
+    client.start();
+
+    client.on(EVENTS.INIT, () => {
+        // Set error after the SDK has moved through the sdk states internally
+        // eslint-disable-next-line
+        // @ts-ignore - Private method by design, but we want to access it in tests
+        client.sdkState = 'error';
+    });
+
+    client.on(EVENTS.RECOVERED, () => {
+        // eslint-disable-next-line
+        // @ts-ignore - Private method by design. but we want to access it in tests
+        expect(client.sdkState).toBe('healthy');
+        client.stop();
+        done();
+    });
+});
+
+test('Should set sdkState to healthy when client is started', (done) => {
+    const config: IConfig = {
+        url: 'http://localhost/test',
+        clientKey: '12',
+        appName: 'web',
+    };
+
+    const client = new UnleashClient(config);
+    // eslint-disable-next-line
+    // @ts-ignore - Private method by design, but we want to access it in tests
+    expect(client.sdkState).toBe('initializing');
+
+    client.start();
+
+    client.on(EVENTS.INIT, () => {
+        // eslint-disable-next-line
+        // @ts-ignore - Private method by design, but we want to access it in tests
+        expect(client.sdkState).toBe('healthy');
+        client.stop();
+        done();
+    });
+});

src/index.ts

@@ -37,2 +37,3 @@ import { TinyEmitter } from 'tiny-emitter';
     fetch?: any;
+    createAbortController?: () => AbortController;
     bootstrap?: IToggle[];
@@ -70,2 +71,3 @@ bootstrapOverride?: boolean;
     SENT: 'sent',
+    RECOVERED: 'recovered',
 };
@@ -85,2 +87,4 @@
 
+type SdkState = 'initializing' | 'healthy' | 'error';
+
 export const resolveFetch = () => {
@@ -100,2 +104,14 @@ try {
 
+const resolveAbortController = () => {
+    try {
+        if (typeof window !== 'undefined' && 'AbortController' in window) {
+            return () => new window.AbortController();
+        } else if ('fetch' in globalThis) {
+            return () => new globalThis.AbortController();
+        }
+    } catch (e) {
+        console.error('Unleash failed to resolve "AbortController" factory', e);
+    }
+};
+
 export class UnleashClient extends TinyEmitter {
@@ -114,2 +130,4 @@ private toggles: IToggle[] = [];
     private fetch: any;
+    private createAbortController?: () => AbortController;
+    private abortController?: AbortController | null;
     private bootstrap?: IToggle[];
@@ -123,2 +141,3 @@ private bootstrapOverride: boolean;
     private started = false;
+    private sdkState: SdkState;
 
@@ -137,2 +156,3 @@ constructor({
         fetch = resolveFetch(),
+        createAbortController = resolveAbortController(),
         bootstrap,
@@ -171,2 +191,3 @@ bootstrapOverride = true,
         this.usePOSTrequests = usePOSTrequests;
+        this.sdkState = 'initializing';
         this.ready = new Promise((resolve) => {
@@ -177,2 +198,3 @@ this.init()
                     console.error(error);
+                    this.sdkState = 'error';
                     this.emit(EVENTS.ERROR, error);
@@ -188,4 +210,10 @@ resolve();
         }
+        if (!createAbortController) {
+            console.error(
+                'Unleash: You must either provide your own "AbortController" implementation or run in an environment where "AbortController" is available.'
+            );
+        }
 
         this.fetch = fetch;
+        this.createAbortController = createAbortController;
         this.bootstrap =
@@ -315,2 +343,4 @@ bootstrap && bootstrap.length > 0 ? bootstrap : undefined;
         }
+
+        this.sdkState = 'healthy';
         this.emit(EVENTS.INIT);
@@ -380,2 +410,11 @@ }
         if (this.fetch) {
+            if (this.abortController) {
+                this.abortController.abort();
+            }
+            this.abortController =
+                this.createAbortController && this.createAbortController();
+            const signal = this.abortController
+                ? this.abortController.signal
+                : undefined;
+
             try {
@@ -394,6 +433,11 @@ const isPOST = this.usePOSTrequests;
                     method,
-                    cache: 'no-cache',
                     headers: this.getHeaders(),
                     body,
+                    signal,
                 });
+                if (this.sdkState === 'error' && response.status < 400) {
+                    this.sdkState = 'healthy';
+                    this.emit(EVENTS.RECOVERED);
+                }
+
                 if (response.ok && response.status !== 304) {
@@ -404,2 +448,6 @@ this.etag = response.headers.get('ETag') || '';
 
+                    if (this.sdkState !== 'healthy') {
+                        this.sdkState = 'healthy';
+                    }
+
                     if (!this.bootstrap && !this.readyEventEmitted) {
@@ -413,2 +461,3 @@ this.emit(EVENTS.READY);
                     );
+                    this.sdkState = 'error';
                     this.emit(EVENTS.ERROR, {
@@ -421,3 +470,6 @@ type: 'HttpError',
                 console.error('Unleash: unable to fetch feature toggles', e);
+                this.sdkState = 'error';
                 this.emit(EVENTS.ERROR, e);
+            } finally {
+                this.abortController = null;
             }
@@ -424,0 +476,0 @@ }

src/metrics.ts

@@ -138,3 +138,2 @@ // Simplified version of: https://github.com/Unleash/unleash-client-node/blob/main/src/metrics.ts
             await this.fetch(url, {
-                cache: 'no-cache',
                 method: 'POST',
@@ -141,0 +140,0 @@ headers: this.getHeaders(),

New alerts

No v1

Quality

Package is not semver >=1. This means it is not stable and does not support ^ ranges.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

303753

increased by3.53%

Lines of code

2872

increased by4.36%

Number of lines in readme file

283

increased by0.71%

Worsened metrics

Number of low quality alerts

1

increased byInfinity%

No dependency changes