React integration

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React integration

This document covers how to use Real User Monitoring JavaScript agent with React applications. Please see our Getting started guide for configuring the Real User Monitoring agent.

Installing Elastic APM React package

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Install the @elastic/apm-rum-react package as a dependency to your application:

npm install @elastic/apm-rum-react --save

Instrumenting your React application

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The React integration package provides two approaches to instrumenting your application:

Instrumenting application routes

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To instrument the application routes, you can use ApmRoute component provided in the package. ApmRoute creates a transaction that has the path of the Route as its name and has route-change as its type.

Currently ApmRoute only supports applications using react-router library.

First you should import ApmRoute from the @elastic/apm-rum-react package:

import { ApmRoute } from '@elastic/apm-rum-react'

Then, you should replace Route components from the react-router library with ApmRoute. You can use ApmRoute in any of the routes that you would like to monitor, therefore, you don’t have to change all of your routes:

class App extends React.Component {
  render() {
    return (
      <div>
        <ApmRoute
          exact
          path="/"
          component={() => (
            <Redirect
              to={{
                pathname: '/home'
              }}
            />
          )}
        />
        <ApmRoute path="/home" component={HomeComponent} />
        <Route path="/about" component={AboutComponent} />
      </div>
    )
  }
}

ApmRoute only instruments the route if component property is provided, in other cases, e.g. using render or children properties, ApmRoute will only renders the route without instrumenting it, please instrument the individual component using withTransaction in these cases instead.

Instrumenting individual React components

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First you should import withTransaction from the @elastic/apm-rum-react package:

import { withTransaction } from '@elastic/apm-rum-react'

Then, you can use withTransaction as a function to wrap your React components:

class AboutComponent extends React.Component { }
export default withTransaction('AboutComponent', 'component')(AboutComponent)

withTransaction accepts two parameters, "transaction name" and "transaction type". If these parameters are not provided, the defaults documented in Transaction API will be used.

Instrumenting lazy loaded routes

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When the route is rendered lazily with components using React.lazy or a similar API, it is currently not possible to auto instrument the components dependencies via ApmRoute. To instrument these lazy rendered routes and capture the spans associated with the components, you’ll need to manually instrument the code with the withTransaction API.

import React, { Component, Suspense, lazy } from 'react'
import { Route, Switch } from 'react-router-dom'
import { withTransaction } from '@elastic/apm-rum-react'

const Loading = () => <div>Loading</div>
const LazyRouteComponent = lazy(() => import('./lazy-component'))

function Routes() {
  return (
    <Suspense fallback={Loading()}>
      <Switch>
        <Route path="/lazy" component={LazyRouteComponent} />
      </Switch>
    </Suspense>
  )
}

// lazy-component.jsx
class LazyComponent extends Component {}
export default withTransaction('LazyComponent', 'component')(LazyComponent)

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