AE: a log configuration on a client script

I created a client script to put a button on the sales order page and want to leave a log.

However, the log is not left and never comes out with the following script.

What is the problem?

------------------

define([], function () {

/**

*

*

* @NApiVersion 2.0

* @NScriptType ClientScript

*/

var exports = {};

function pageInit(context) {

// just init button

}

function onButtonClick(context) {

// process

// process

log.audit({

title: 'finished processing',

details: context.CurrentRecord.getField('tranid') +': clear all shipment info'

});

}

exports.onButtonClick = onButtonClick;

exports.pageInit = pageInit;

return exports;

});