2.0 beta2 :iron-a11y-keys-behavior.html:419 Uncaught TypeError: Cannot read property 'length' of undefined

[sowsan]

Look like 2.0 beta2 has the same issue mentioned in issue #12

iron-a11y-keys-behavior.html:419 Uncaught TypeError: Cannot read property 'length' of undefined

[Zecat]

Line 419 of the last iron-a11y-keys-behavior doesn't seem to match Cannot read property 'length' of undefined so I guess you use an old version and maybe face this issue. Can you show your bower dependencies?
@jamesmgg you triggered this issue before can you reproduce now?

[jamesmgg]

I'm currently not using paper-stepper anymore, so I haven't tested it... All I know is that not using shadow DOM (and using Shady DOM instead) fixes the error.

[sowsan]

FYI - issue is there with 2.0 beta3 as well.

[Zecat]

Can you show your bower.json file ?

[sowsan]

{
"name": "paper-stepper",
"version": "2.0-beta.3",
"authors": [
"Zecat jullienfelix@gmail.com"
],
"description": "Material paper-stepper element.",
"keywords": [
"web-component",
"polymer",
"seed"
],
"main": "paper-stepper.html",
"license": "http://polymer.github.io/LICENSE.txt",
"homepage": "https://github.com/zecat/paper-stepper/",
"ignore": [
"/.",
"/test/"
],
"dependencies": {
"polymer": "Polymer/polymer#^1.2.0",
"paper-button": "PolymerElements/paper-button#^1.0.11",
"iron-icons": "PolymerElements/iron-icons#^1.1.3",
"paper-styles": "PolymerElements/paper-styles#^1.1.4",
"paper-ripple": "PolymerElements/paper-ripple#^1.0.5",
"iron-selector": "PolymerElements/iron-selector#^1.3.0",
"iron-icon": "PolymerElements/iron-icon#^1.0.8",
"iron-flex-layout": "PolymerElements/iron-flex-layout#^1.3.1",
"neon-animation": "PolymerElements/neon-animation#^1.1.1",
"iron-validatable-behavior": "PolymerElements/iron-validatable-behavior#^1.0.5",
"iron-collapse": "PolymerElements/iron-collapse#^1.2.0"
},
"devDependencies": {
"paper-input": "PolymerElements/paper-input#^1.1.10",
"paper-material": "PolymerElements/paper-material#^1.0.6",
"iron-component-page": "PolymerElements/iron-component-page#^1.0.0",
"web-component-tester": "",
"iron-form": "PolymerElements/iron-form#^1.0.16",
"iron-demo-helpers": "PolymerElements/iron-demo-helpers#^1.2.2"
}
}

[sowsan]

In my bower.json , im using the below to get the paper-stepper

"paper-stepper": "Zecat/paper-stepper#2.0-beta.3"