TypeScript types

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PostHog supports TypeScript apps natively, without you having to compile the TypeScript yourself (although you can also do that).

To build a TypeScript app, you'll probably need some types, so read on.


To use the types in your app, you can install them as follows:

# if using yarn
yarn add --dev @posthog/plugin-scaffold
# if using npm
npm install --save-dev @posthog/plugin-scaffold

Then, in your apps, you can use them like so:

import { PluginEvent, PluginMeta } from '@posthog/plugin-scaffold'
export function processEvent(event: PluginEvent, meta: PluginMeta) {
if (event.properties) {
event.properties['hello'] = 'world'
return event


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