SEO script, quick JSON-LD structured data view/check.

json-ld-view.js

(function() {
    clear();
    let results = [];
    const j = document.querySelectorAll("script[type='application/ld+json']");
    const items = j.forEach((i) => {
        let json = i.innerHTML;
        try {
            json = ["OK", "color:green;font-size:13px;", JSON.stringify(JSON.parse(json), null, 2)];
        } catch (err) {           
            json = ["ERROR", "color:red;font-size:13px;", json];
        }
        results.push(json);
    });
    
    for (const J of results) {
        console.log("%c" + J[0], J[1]);
        console.log(J[2]);
    }
}());