mr-gtag/dist/umd/index.js

Easy, strong typed, and a modern way to use google analytics gtag lib.

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
    typeof define === 'function' && define.amd ? define(['exports'], factory) :
    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.gtag = {}));
}(this, (function (exports) { 'use strict';

    const anyWindow = window;
    const defaultGtagConfigurationOptions = {
        send_page_view: true,
    };
    /**
     * Only injects the google analytics gtag lib without calling config.
     * @param trackingId The ga tracking id.
     */
    function onlyInstallGtag(trackingId) {
        const { head } = document;
        const script = document.createElement('script');
        script.type = 'text/javascript';
        script.async = true;
        script.src = `https://www.googletagmanager.com/gtag/js?id=${trackingId}`;
        head.insertBefore(script, head.firstChild);
        anyWindow.dataLayer = anyWindow.dataLayer || [];
        gtagRaw('js', new Date());
    }
    /**
     * Injects the google analytics gtag lib.
     * @param trackingId The ga tracking id.
     * @param options The options to configure.
     */
    function installGtag(trackingId, options) {
        onlyInstallGtag(trackingId);
        options = Object.assign(Object.assign({}, defaultGtagConfigurationOptions), options);
        gtag('config', trackingId, options);
    }
    function gtagRaw(...params) {
        anyWindow.dataLayer.push(arguments);
    }
    // tslint:enable: unified-signatures, max-line-length
    function gtag(arg1, arg2, arg3) {
        anyWindow.dataLayer.push(arguments);
    }

    exports.gtag = gtag;
    exports.gtagRaw = gtagRaw;
    exports.installGtag = installGtag;
    exports.onlyInstallGtag = onlyInstallGtag;

    Object.defineProperty(exports, '__esModule', { value: true });

})));