npm i jquery jquery-ui

import $ from 'jquery'
import 'jquery-ui/ui/widgets/draggable'

$('.ivu-modal').draggable({
    handle: '.ivu-modal-header',
    cursor: 'move',
    drag: function (e, ui) {
        if (ui.position.top < 1) ui.position.top = 0
    }
})