JS gets the parent page to pass parameters

method:
/**
 * Get parent page passing parameters
 * @param name
 * @returns {*}
 */
function getQueryString(name) {
    var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');
    var r = window.location.search.substr(1).match(reg);
    if (r != null) {
        return unescape(r[2]);
    }
    return null;
}

use:

//The parameter purchaseSuborderId passed by the parent page

var  purchaseSubOrderId = getQueryString("purchaseSuborderId")