Client Configuration Values

About #

Read about client configuration and view in-depth examples

Usage Example #

The below example demonstrates how we would turn on or off log event submissions at runtime without redeploying the app or changing server config settings.

First, we add a (completely arbitrary for this example) enableLogSubmission client configuration value key with value true in the Project's Settings in the Exceptionless dashboard.

Exceptionless Client Configuration Value

Then, we register a new client side plugin that runs each time an event is created. If our key (enableLogSubmission) is set to false and the event type is set to log, we will discard the event.

import { Exceptionless } from "@exceptionless/browser";

await Exceptionless.startup(c => {
c.addPlugin('Conditionally cancel log submission', 100, (context) => {
var enableLogSubmission = context.client.config.settings['enableLogSubmission'];

// only cancel event submission if it’s a log event and
// enableLogSubmission is set to a value and the value is not true.
if (context.event.type === 'log' && (!!enableLogSubmission && enableLogSubmission !== 'true')) {
context.cancelled = true;

Updating Client Configuration settings #

Exceptionless Client Configuration Settings

All project settings are synced to the client in almost real time. When an event is submitted to Exceptionless we send down a response header with the current configuration version. If a newer version is available we will immediately retrieve and apply the latest configuration.

By default the client will check after 5 seconds on client startup (if no events are submitted on startup) and then every 2 minutes after the last event submission for updated configuration settings.

  • Checking for updated settings doesn't count towards plan limits.
  • Only the current configuration version is sent when checking for updated settings (no user information will ever be sent).
  • If the settings haven't changed, then no settings will be retrieved.

You can also turn off the automatic updating of configuration settings when idle using the code below.

import { Exceptionless } from "@exceptionless/browser";

await Exceptionless.startup(c => {
c.updateSettingsWhenIdleInterval = -1;

You can also manually update the configuration settings using the code below.

import { Exceptionless, SettingsManager } from "@exceptionless/browser";

await SettingsManager.updateSettings(Exceptionless.config);

Subscribing to Client Configuration Setting changes #

To be notified when client configuration settings change, subscribe to them using the below code.

import { Exceptionless } from "@exceptionless/browser";

await Exceptionless.startup(c => {
c.subscribeServerSettingsChange((configuration) => {
// configuration.settings contains the new settings

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