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mat-horizontal-stepper: Unable to set linear=true

See original GitHub issue

Bug, feature request, or proposal:

Bug

What is the expected behaviour?

Stepper is linear and doesn’t produce the below error.

What is the current behavior?

Stepper component throws errors when linear parameter is set to true. Tested with dynamically generated steps and non-dynamic steps and same error occurs.

ERROR TypeError: Cannot read property 'invalid' of undefined
    at eval (VM808 cdk-stepper.umd.js:375)
    at Array.some (<anonymous>)
    at MatHorizontalStepper.CdkStepper._anyControlsInvalid (VM808 cdk-stepper.umd.js:375)
    at MatHorizontalStepper.set [as selectedIndex] (VM808 cdk-stepper.umd.js:206)
    at MatHorizontalStepper.set [as selected] (VM808 cdk-stepper.umd.js:230)
    at MatStep.CdkStep.select (VM808 cdk-stepper.umd.js:125)
    at Object.eval [as handleEvent] (VM994 MatHorizontalStepper.ngfactory.js:26)
    at handleEvent (VM801 core.umd.js:12055)
    at callWithDebugContext (VM801 core.umd.js:13525)
    at Object.debugHandleEvent [as handleEvent] (VM801 core.umd.js:13113)
    at dispatchEvent (VM801 core.umd.js:8647)
    at eval (VM801 core.umd.js:9258)
    at HTMLElement.eval (VM791 platform-browser.umd.js:2685)
    at e.invokeTask (VM1088 zone.min.js:1)
    at Object.onInvokeTask (VM801 core.umd.js:3913)

What are the steps to reproduce?

Recreated basic Stepper component in this plunker with a few example: http://plnkr.co/edit/mES0H2nKfYjfcrUOHexz

What is the use-case or motivation for changing an existing behavior?

N/A

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

angular/material 2.0.0-beta.12

Is there anything else we should know?

Issue Analytics

State:
Created 6 years ago
Reactions:3
Comments:10 (1 by maintainers)

Top GitHub Comments

5reactions

pylecommented, Oct 11, 2017

Ahh I see. So in my case, I don’t want to treat the stepper as a form but rather listen to the selectionChange events and use routes; I could just create a dummy AbstractControl for this but it seems a little wasteful.

3reactions

yusijscommented, Oct 25, 2017

I’m seeing the same (or at least a similar) issue. I want some steps to be mandatory, and others to be optional. However, optional=true does nothing, and I still get the error described in the OP. Am I completely misreading the docs, or is there something off here?

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