Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Cannot read property 'milliseconds' of null

See original GitHub issue

https://codepen.io/kurdtpage/pen/dEqMXb I am getting data via JSON, which is not shown.

Sometimes (intermittently) FC has problems getting the milliseconds and spits out “Cannot read property ‘milliseconds’ of null”. I have isolated this problem to the following areas: core\main.js:

function asRoughMs, sometimes dur is null. Fix: if (dur == null) return 1;
around line 4914, DateEnv.prototype.add = function (marker, dur) { the error is at the following line: a[6] += dur.milliseconds;. My fix is to add if (marker == null) marker = new Date(); // Today at the start of the function (seems to work?)
the last function, computeActiveRange sometimes dateProfile.minTime is null so getting the property .milliseconds fails

However with these fixes in place, sometimes the calendar will show a blank page

Issue Analytics

State:
Created 4 years ago
Comments:9 (3 by maintainers)

Top GitHub Comments

1reaction

kurdtpagecommented, May 30, 2019

Stacktrace/output:

Uncaught TypeError: Cannot read property 'years' of null
    at DateEnv.add (core_main.js:4917)
    at i.r (allworkshop.min.js:1)
    at i.buildDayRanges (core_main.js:1541)
    at i.render (allworkshop.min.js:1)
    at i.Component.receiveProps (core_main.js:3961)
    at o.render (allworkshop.min.js:1)
    at o.Component.receiveProps (core_main.js:3961)
    at CalendarComponent.renderView (core_main.js:6331)
    at CalendarComponent.render (core_main.js:6256)
    at CalendarComponent.Component.receiveProps (core_main.js:3961)
DateEnv.add @ core_main.js:4917
r @ allworkshop.min.js:1
(anonymous) @ core_main.js:1541
i.render @ allworkshop.min.js:1
Component.receiveProps @ core_main.js:3961
o.render @ allworkshop.min.js:1
Component.receiveProps @ core_main.js:3961
CalendarComponent.renderView @ core_main.js:6331
CalendarComponent.render @ core_main.js:6256
Component.receiveProps @ core_main.js:3961
Calendar.renderComponent @ core_main.js:6867
Calendar.executeRender @ core_main.js:6827
Calendar.render @ core_main.js:6649
setcal @ workshop.php:370
refreshevents @ workshop.php:751
(anonymous) @ workshop.php:817
setTimeout (async)
(anonymous) @ workshop.php:815
l @ allworkshop.min.js:1
fireWith @ allworkshop.min.js:1
ready @ allworkshop.min.js:1
a @ allworkshop.min.js:1

0reactions

acerixcommented, Aug 12, 2019

If there is still an issue, please provide a way to reproduce it.