Support for aria-labels on link

[patniko]

Changelog Entry

Added support for custom attributes in the markdown renderer.

Description

Modern screen readers require aria-label attributes to be present on links, but the current markdown-it configuration doesn't support aria-label attributes. Adding support for attributes will enable users to set aria-label's and custom attributes on links in the Bot configuration interface.

Appending {aria-label="Label description"} to the end of the link sets the aria-label attribute on the link when rendered.

Specific Changes

Imported the markdown-it-attrs npm package and added it to the renderer's configuration.

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• Testing Added

[compulim]

I am testing 4.8.1-master.31291d5.

[compulim]

The markdown-it-attrs package doesn't support ES5 and will break IE11 simply by loading it.

Although it do include ES5 version, it didn't expose it properly (via package.json/browser field).

I am fixing it by transpiling it before consuming/loading it. Will need to take another PR before we can produce a working build.

[compulim]

#3025 will fix this.