Frontend Monitoring snippet API

Once installed, you will be able to configure how your Website is monitored via the apm object. The apm object is only accessible through the pm2Ready function exposed by the snippet.

pm2Ready(callback)

The callback function will be called when the PM2 APM will be ready (or immediately if it is already ready). The callback will receive the apm object as first argument. Usage example:

pm2Ready(apm => {
  apm.setMeta('user', user.email)
})

apm.setBucket(bucketId)

Set your bucket id. This will be used to authenticate and store the data transmitted by the browser APM.

apm.setApplication(applicationName)

Set your application name. This will be used to authenticate and store the data transmitted by the browser APM.

apm.setMeta(name, value)

Attach a custom meta value to all data sent by the browser APM. For example, this can be used to identify the current logged-in user, or your application release version. Example:

apm.setMeta('user', user.email)

apm.removeMeta(name)

Remove a meta from future data packets.

apm.addIgnoreURLRule(rule)

Add a rule to ignore some URLs. The rule parameter should be a function taking the string URL as argument, and returning a boolean reflcting whether this URL should be ignored or not.

This is used in multiple ways:

• If the current page location is ignored, no data will be collected at all.
• If an issue is caused by a script loaded from an ignored location, the issue won’t be reported.
• This rule also applies to slow HTTP queries warnings.

Example:

apm.addIgnoreURLRule(url => {
  // Ignores anything coming from Google Analytics
  return url.startsWith("https://www.google-analytics.com/")
})

apm.reportTimings()

Automatically report various metrics from the current page. It will track the time your page takes to load, among other performance metrics.

apm.reportIssues(options)

Automatically report unexpected issues triggered during the users sessions. It will capture uncaught JS exceptions to help you improve your user experience.

options.recordSessions

By default, the user session will be recorded to add some context to issues. You will be able to replay the last actions done by the user in your PM2 Enterprise dashboard. To desactivate this feature, pass recordeSessions: false.

You can configure how the session is recorded by passing an object to this option. To prevent some information from being recorded, you have two options:

• By default, an element with the class name .pm2-block will not be recorded. Instead, it will be seen as a placeholder with the same dimension. You can change this class name by passing another one or a RegExp to recordSessions.blockClass.

• By default, an element with the class name .pm2-ignore will not record its input events. Password inputs will be ignored as default. You can change this class name by passing another one to recordSessions.ignoreClass.

Example:

apm.reportIssues({
  recordSessions: {
    blockClass: 'my-block-class',
    ignoreClass: 'my-ignore-class'
  }
})

new apm.ZipkinLogger()

Create a Zipkin logger to send distributed traces started from your website frontend. See the zipkin-js documentation for further informations. Usage example:

const tracer = new Zipkin.Tracer({
  ctxImpl: new Zipkin.ExplicitContext(),
  recorder: new Zipkin.BatchRecorder({
    logger: new apm.ZipkinLogger()
  }),
  localServiceName: 'service-a'
})