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'use client'
// TODO: Evaluate import 'client only'
import React, { useEffect } from 'react'
import Script from 'next/script'
import type { GAParams } from '../types/google'
declare global {
interface Window {
dataLayer?: Object[]
}
}
let currDataLayerName: string | undefined = undefined
export function GoogleAnalytics(props: GAParams) {
const { gaId, debugMode, dataLayerName = 'dataLayer', nonce } = props
if (currDataLayerName === undefined) {
currDataLayerName = dataLayerName
}
useEffect(() => {
// performance.mark is being used as a feature use signal. While it is traditionally used for performance
// benchmarking it is low overhead and thus considered safe to use in production and it is a widely available
// existing API.
// The performance measurement will be handled by Chrome Aurora
performance.mark('mark_feature_usage', {
detail: {
feature: 'next-third-parties-ga',
},
})
}, [])
return (
<>
<Script
id="_next-ga-init"
dangerouslySetInnerHTML={{
__html: `
window['${dataLayerName}'] = window['${dataLayerName}'] || [];
function gtag(){window['${dataLayerName}'].push(arguments);}
gtag('js', new Date());
gtag('config', '${gaId}' ${debugMode ? ",{ 'debug_mode': true }" : ''});`,
}}
nonce={nonce}
/>
)
}
export function sendGAEvent(..._args: Object[]) {
if (currDataLayerName === undefined) {
console.warn(`@next/third-parties: GA has not been initialized`)
return
}
if (window[currDataLayerName]) {
window[currDataLayerName].push(arguments)
} else {
console.warn(
`@next/third-parties: GA dataLayer ${currDataLayerName} does not exist`
)
}
}
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