moment is not defined & format to get duration of seconds

I am trying to subtract time now() with data from mysql.
Over here, M_Start = "08:15:00"
Example Current = "22:02:39"
My intention is to get total seconds of the different.
While using moment function : error message : "ReferenceError: moment is not defined (line 22, col 9)"

var ST_Target;
var Shift_Target;

var M_Start = flow.get('Morning_start');
var M_Stop =flow.get('Morning_end');
var M_sec = flow.get('Morning_sec');

var M_cycle = flow.get("Cycle_Time");

var dt = new Date();
var hour = dt.getHours();
hour = ("0" + hour).slice(-2);

var minute = dt.getMinutes();
minute=("0" +minute).slice(-2);

var sec = dt.getSeconds();
sec=("0" + sec).slice(-2);

var current = hour+":" +minute+":"+sec;

var d = moment.duration(current.diff(M_Start[0]));

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Rama TitoProgrammerAsked:
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Chinmay PatelChief Technology NinjaCommented:
Hi Rama,

Have you added the reference to Moment.js library in your code? If not, please add that reference and this error will go away.

Regards,
Chinmay
Rama TitoProgrammerAuthor Commented:
Hi Chinmay,

I am doing in node-red and script in function palette. I did install moment palette. May i know to add in moment.js
Chinmay PatelChief Technology NinjaCommented:
Hi Rama,

How did you install the moment palette? may I know the command you used?

I am hoping you have used: https://www.npmjs.com/package/node-red-contrib-moment

After that you need to hint Node that we need to use this package
var momentjs = require("node-red-contrib-moment")

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Rama TitoProgrammerAuthor Commented:
"ReferenceError: require is not defined (line 1, col 16)"

I did install the packages and insert line

var momentjs = require("node-red-contrib-moment");

var ST_Target;
var Shift_Target;

var M_Start = flow.get('Morning_start');
var M_Stop =flow.get('Morning_end');
var M_sec = flow.get('Morning_sec');

var M_cycle = flow.get("Cycle_Time");

var dt = new Date();
var hour = dt.getHours();
hour = ("0" + hour).slice(-2);

var minute = dt.getMinutes();
minute=("0" +minute).slice(-2);

var sec = dt.getSeconds();
sec=("0" + sec).slice(-2);

var current = hour+":" +minute+":"+sec;

var d = moment.duration(current.diff(M_Start[0]));

msg.payload =d;

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Chinmay PatelChief Technology NinjaCommented:
Did you stop and restart Node-RED after adding the library?

Also, comment out
var momentjs = require("node-red-contrib-moment");

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Rama TitoProgrammerAuthor Commented:
I did stop and restart .

The error still persist -> "ReferenceError: require is not defined (line 1, col 16)"
Chinmay PatelChief Technology NinjaCommented:
Please remove that line
var momentjs = require("node-red-contrib-moment");

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Rama TitoProgrammerAuthor Commented:
hi , I did work around with this method and its works.

var current = hour+":" +minute+":"+sec;
var curr = current.split(":");
var Mor = M_Start[0].split(":");

var startCurr = new Date(0,0,0, curr[0],curr[1],curr[2]);
var startMor = new Date(0,0,0, Mor[0],Mor[1],Mor[2]);

var diffM = startCurr.getTime() - startMor.getTime();
var Min = Math.floor(diffM/1000/60);

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Chinmay PatelChief Technology NinjaCommented:
In that case, please accept your comment as an answer. Thanks for accepting my comment as an answer but if it did not help you, then you should not allocate it points.
Rama TitoProgrammerAuthor Commented:
Good day Chinmay. Without certain points from your side I am unable to find the solution. thank you.
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