Create an array from csv for use with D3.js library

It would probably be better to keep it as a separate CSV file which you load asynchronously. So keep your data in data.csv and then load it using d3::csv() like so:

d3.csv("data.csv", function(data){
    console.log(data);
});

If you really want it in a <script> tag though, put it in an array or whatever data structure is appropriate.

<script>
    var data = [
        {
            country: "Russian Federation",
            value: 293
        },
        {
            country: "Italy",
            value: 302
        },
        {
            country: "France",
            value: 91
        },
        {
            country: "Luxembourg",
            value: 7
        },
        {
            country: "Greece",
            value: 7
        },
        {
            country: "Japan"
            value: 7
        },
        {
            country: "Others",
            value: 53
        }
    ];
</script>

Then use the data in whatever function d3.js has. You don't typically make <script> tags with type="text/csv". You would use text/javascript if anything since it's primarily only used for JavaScript. See MDN script tag documentation

CSV is not easy to parse (optional quotes, escaped char, separator not normalized (tab, comma, semicolon...)) you should use a library for that (d3 have one)

var csvSource = document.querySelector("#cur_data").textContent;
var data = d3.csv.parse(csvSource);