How I can get metadata from another site ?

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Hello everyone. I want to try get meta tags from website. Maybe someone knows how I can do this?

What I have tried:

I'm trying with JS code like this:

$.ajax({
    url: "http://example.com",
    dataType: 'text',
    success: function(data) {
        var elements = $("meta").html(data)[0].getElementsByTagName("head");
        for(var i = 0; i < elements.length; i++) {
            var theText = elements[i].firstChild.nodeValue;
            console.log(theText);
        }
    }
});

But, I get this error Failed to load http://example.com: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://example.com' is therefore not allowed access.