google-publisher-tag/dist/loader.js

Type-safe React wrapper for Google Publisher Tag (GPT).

let gptPromise = null;
export function loadGPT() {
    if (typeof window === "undefined") {
        return Promise.reject(new Error("GPT can only be loaded on client-side"));
    }
    if (gptPromise)
        return gptPromise;
    window.googletag = window.googletag || { cmd: [] };
    gptPromise = new Promise((resolve, reject) => {
        const script = document.createElement("script");
        script.async = true;
        script.src = "https://securepubads.g.doubleclick.net/tag/js/gpt.js";
        script.onload = () => {
            window.googletag.cmd.push(() => {
                resolve(window.googletag);
            });
        };
        script.onerror = () => reject(new Error("Failed to load gpt.js"));
        document.head.appendChild(script);
    });
    return gptPromise;
}