signature_pad: undefined is not an object (evaluating 'this._data[this._data.length-1].push')

Hey,

I’m just raising this for your visibility / in case you have any ideas. I don’t have a repro and am not expecting you to be able to do anything to solve this.

We’re getting this error thrown on one of our production apps. We have lots of apps running out there and only one has ever had this issue, which suggests to me it might be device related.

The error

undefined is not an object (evaluating 'this._data[this._data.length-1].push')

Is being thrown from here:

https://github.com/szimek/signature_pad/blob/master/src/signature_pad.js#L173-L178

That’s pretty much all the info I have. The client using the app hasn’t reported anything to us from a behaviour perspective.

Other info:

Ionic 3 / Angular 4 app deployed via the AppStore
iPad Model: iPad6,11
UA: UA: Mozilla/5.0 (iPad; CPU OS 11_0_1 like Mac OS X) AppleWebKit/604.1.38 (KHTML, like Gecko) Mobile/15A402

I am tracking the issue and will update you if I get further information.

Thanks for all your hard work on this repo,

Stephen

About this issue

Original URL
State: closed
Created 6 years ago
Reactions: 11
Comments: 18 (1 by maintainers)

Most upvoted comments

can someone confirm that the issue is fixed?

the changelog https://github.com/szimek/signature_pad/blob/master/CHANGELOG.md#300-beta4 only references another issue #480 instead of this one.

capc0 on Aug 10, 2021

@UziTech As far as I’m aware, this issue hasn’t been resolved. I’m assuming it’s been closed to clean up issues that are stale?

JosNun on Jun 19, 2021

And the issue has been open since January and got no answers =/

rafaelgrilli92 on Oct 24, 2018

I’m joining the club with the error messages: TypeError: Cannot read property 'push' of undefined and TypeError: Cannot read property 'length' of undefined

Our tracking said it’s a Samsung SM-T5851 with Chrome 64.0.01 and running Android 7.0.01

Minified stack trace:

Cannot read property 'push' of undefined
at i._strokeUpdate (scripts.09258a303eed71dcb9ac.bundle.js:1)
at i._strokeMoveUpdate (scripts.09258a303eed71dcb9ac.bundle.js:1)
at HTMLCanvasElement._handleTouchMove (scripts.09258a303eed71dcb9ac.bundle.js:1)
at e.invokeTask (polyfills.395920b077ebea14c462.bundle.js:1)
at Object.onInvokeTask (main.4f4970c93c661f275c5d.bundle.js:1)
at e.invokeTask (polyfills.395920b077ebea14c462.bundle.js:1)
at t.runTask (polyfills.395920b077ebea14c462.bundle.js:1)
at t.invokeTask [as invoke] (polyfills.395920b077ebea14c462.bundle.js:1)
at _ (polyfills.395920b077ebea14c462.bundle.js:1)
at HTMLCanvasElement.m (polyfills.395920b077ebea14c462.bundle.js:1)

timbru31 on Feb 15, 2018