launchdarkly-react-client-sdk
Version:
LaunchDarkly SDK for React
177 lines • 9.32 kB
JavaScript
;
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Object.defineProperty(exports, "__esModule", { value: true });
exports.withLDProvider = void 0;
var React = __importStar(require("react"));
var lodash_camelcase_1 = __importDefault(require("lodash.camelcase"));
var types_1 = require("./types");
var context_1 = require("./context");
var initLDClient_1 = __importDefault(require("./initLDClient"));
var utils_1 = require("./utils");
/**
* `withLDProvider` is a function which accepts a config object which is used to
* initialize `launchdarkly-js-client-sdk`.
*
* This HOC does three things:
* - It initializes the ldClient instance by calling `launchdarkly-js-client-sdk` initialize on `componentDidMount`
* - It saves all flags and the ldClient instance in the context API
* - It subscribes to flag changes and propagate them through the context API
*
* The difference between `withLDProvider` and `asyncWithLDProvider` is that `withLDProvider` initializes
* `launchdarkly-js-client-sdk` at `componentDidMount`. This means your flags and the ldClient are only available after
* your app has mounted. This can result in a flicker due to flag changes at startup time.
*
* `asyncWithLDProvider` initializes `launchdarkly-js-client-sdk` at the entry point of your app prior to render.
* This means that your flags and the ldClient are ready at the beginning of your app. This ensures your app does not
* flicker due to flag changes at startup time.
*
* @param config - The configuration used to initialize LaunchDarkly's JS SDK
* @return A function which accepts your root React component and returns a HOC
*/
function withLDProvider(config) {
return function withLDProviderHoc(WrappedComponent) {
var options = config.options, userReactOptions = config.reactOptions;
var reactOptions = __assign(__assign({}, types_1.defaultReactOptions), userReactOptions);
return /** @class */ (function (_super) {
__extends(class_1, _super);
function class_1(props) {
var _this = _super.call(this, props) || this;
_this.subscribeToChanges = function (ldClient) {
ldClient.on('change', function (changes) {
var flattened = {};
for (var key in changes) {
// tslint:disable-next-line:no-unsafe-any
var flagKey = reactOptions.useCamelCaseFlagKeys ? lodash_camelcase_1.default(key) : key;
flattened[flagKey] = changes[key].current;
}
_this.setState(function (_a) {
var flags = _a.flags;
return ({ flags: __assign(__assign({}, flags), flattened) });
});
});
};
_this.state = {
flags: {},
ldClient: undefined,
};
if (options) {
var bootstrap = options.bootstrap;
if (bootstrap && bootstrap !== 'localStorage') {
var flags = reactOptions.useCamelCaseFlagKeys ? utils_1.camelCaseKeys(bootstrap) : bootstrap;
_this.state = {
flags: flags,
ldClient: undefined,
};
}
}
return _this;
}
class_1.prototype.componentDidMount = function () {
return __awaiter(this, void 0, void 0, function () {
var clientSideID, user, flags, _a, fetchedFlags, ldClient;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
clientSideID = config.clientSideID, user = config.user, flags = config.flags;
return [4 /*yield*/, initLDClient_1.default(clientSideID, user, reactOptions, options, flags)];
case 1:
_a = _b.sent(), fetchedFlags = _a.flags, ldClient = _a.ldClient;
this.setState({ flags: fetchedFlags, ldClient: ldClient });
this.subscribeToChanges(ldClient);
return [2 /*return*/];
}
});
});
};
class_1.prototype.render = function () {
return (React.createElement(context_1.Provider, { value: this.state },
React.createElement(WrappedComponent, __assign({}, this.props))));
};
return class_1;
}(React.Component));
};
}
exports.withLDProvider = withLDProvider;
exports.default = withLDProvider;
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