Javascript: Problem, I solved.

gistfile1.md

Convert string into an array

const strToArr = (str = "", delimiter = " ") => String(str).split(delimiter).filter(Boolean);

strToArr(document.URL, "/"); // return an []

gistfile2.md

Resize Google user's profile photo

const resizeImg = (size, src) => {
    src = String(src);

    if (src.endsWith(".jpg")) {
        src += `?sz=${ size }`;
    } else {
        src += `=s${ size }-c`;
    }

    return src;
};

resizeImg(32, "user/photo/url"); // return resized photo.

gistfile3.md

Web Share API

<button>Share</button>

const share = (buttonShare) => {
    buttonShare.addEventListener("click", () => {
        if ("share" in navigator) {
            navigator.share({
                title: document.title,
                text: document.querySelector("meta[name=description]").content,
                url: document.URL
            }).then(() => console.info("Done")).catch((err) => console.error(err));
        } else {
            const input = document.createElement("input");
            input.value = document.URL;
            input.select();
            document.body.appendChild(input);
            document.execCommand("copy");
            document.body.removeChild(input);
            console.info("Done");
        }
    });
};

const button = document.querySelector("button");
share(button) // return options on mobile phone or copy current url to clipboard on desktop.