# Nuxt3 設置是否添加Google Tag Manager(GTM)
## .env

# 是否添加GTM
ENABLE_GTM=true
GTM_ID="GTM ID"

## nuxt.config.js

export default {
    app:{
        script: [
            // <!-- Google Tag Manager -->
            process.env.ENABLE_GTM === 'true'
            ? {
                hid: 'gtm',
                children:`(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({
                    'gtm.start':new Date().getTime(),event:'gtm.js'});
                    var f=d.getElementsByTagName(s)[0],
                    j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';
                    j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
                })(window,document,'script','dataLayer','${process.env.GTM_ID}');`,
                type: 'text/javascript'
            }
            : undefined
            // <!-- End Google Tag Manager -->
        ].filter(Boolean),
    }
}