stripe

var cardDetails = {
        "card[number]": '4242424242424242',
        "card[exp_month]": '09',
        "card[exp_year]": '2019',
        "card[cvc]": '303'
    };

    var formBody = [];
    for (var property in cardDetails) {
        var encodedKey = encodeURIComponent(property);
        var encodedValue = encodeURIComponent(cardDetails[property]);
        formBody.push(encodedKey + "=" + encodedValue);
    }
    formBody = formBody.join("&");

    let response = await fetch(stripe_url + 'tokens', {
        method: 'post',
        headers: {
            'Accept': 'application/json',
            'Content-Type': 'application/x-www-form-urlencoded',
            'Authorization': 'Bearer ' + secret_key
        },
        body: formBody
    }).then(function (response) {
        if (response.ok) {
            console.log("response")
            console.log(response)
        } else {
            console.log('Network response was not ok.');
        }
    })
        .catch(function (error) {
            console.log('There has been a problem with your fetch operation: ' + error.message);
        });