jwt-client-helper.js

function fetchProtectedData(url, opts = {}) {

    let headers = {
        'Content-Type': 'application/json',
    }
    if (JWT_TOKEN) {
        headers = {
            ...headers,
            'Authorization': `Bearer ${JWT_TOKEN}`,
        }
    }

    let finalOpts = {
        ...opts,
        headers
    }
    return $.ajax(url, finalOpts)
}