Convert jquery ajax call to pure javascript

HI,
I am currently using jquery to make an ajax call :

$.ajax({
        url: url,
        type: 'POST',
        contentType: 'application/json',
        headers: {
            'X-hfh': this.data
        },
        dataType: 'json',
        success: function(result) {
            $.each(result, function(idx, item) {
                mybuddyList.push({
                    DisplayText: item.name,
                    JID: item.id,
                    ImageURL: item.profileImage
                });
            });
        },
        error: function() {
            console.log("Error");
        }
    });

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I want to get rid of jquery and use only javascript to achieve the same.
How do i do it.

Thanks