Button and toggle-button should not contain a `<div>`

[ksag-tap]

Reproduction

https://stackblitz.com/edit/components-issue-utnh8w

Steps to reproduce:

1. run stackblitz
2. see html source

Expected Behavior

element's Permitted content is Phrasing content , according to HTML5 rule.

Actual Behavior

element by Material Button Component and Toggle Button Component includes div element (Flow content)

Environment

• Angular:7 ~ 8
• CDK/Material:7 ~ 8

[jelbourn]

Confirmed that both contain a div which is technically not allowed by the spec, but doesn't actually cause any real problems.

[ksag-tap]

I agree with you, it doesn't cause real problems probably.
But I can't say that I adopt WCAG2.0 4.1.1 when using Matelial Button.

[crisbeto]

#16366

[viniciusschuelter]

this issue need to closed @jelbourn @crisbeto

[jelbourn]

@viniciusschuelter good catch, thanks