Get meta property values with jquery

getMetaProperty.js

function getMetaProperty($, wantedProperty) {
    var meta = $('meta');
    var keys = Object.keys(meta);

    var metaProperty;

    keys.forEach(function (key) {
        if (meta[key].attributes && meta[key].attributes.property && meta[key].attributes.property.value === wantedProperty) {
            metaProperty = meta[key].content;
        }
    });

    return metaProperty || '';
}