This PR uses the excellent a11y-dialog to implement our modal functionality across the UI.
This package covers all our a11y needs - overlay click and ESC to close, controlling aria-* attributes, focus trap and restore. It's also very small (1.6kb) and has good DOM and JS APIs and also seems to be widely used and well tested.
There is one downside to using this, and that is:
We made use of a very handy characteristic of the relationship between HTML labels and inputs in order to implement our modals previously. Adding a for="id" attribute to a label meant you can control an <input id="id" /> from anywhere else in the page without having to pass javascript objects around. It's just based on using the same string for the for attribute and the id attribute. This allowed us to easily open our login dialog with CSS from anywhere within the UI without having to manage passing around a javascript object/function/method in order to open the dialog.
We've PRed #9813 which includes an approach which would make passing around JS modal object easier to do. But in the meantime we've added a little 'hack' here using an additional <input /> element and a change listener which allows us to keep this label/input characteristic of our old modals. I'd originally thought this would be a temporary amend in order to wait on #9813 but the more I think about it, the more I think its quite a nice thing to keep - so longer term we may/may not keep this.
We've always had this idea of being able to markup up information
semantically without thinking about what it should look like, then
applying our %h* placeholder styles to control what the information
should look like.
Back when we originally made our set of %h* placeholders, we tried to
follow Structure as much as possible, which defined the largest header
(which we thought would have been the h1 style) as a super large 3.5rem.
Therefore we made our set of %h* placeholders the same as Structure
beginning at a huge 3.5 size. We then re-overwrote those sizes only in
Consul specific CSS files thinking that this was due to us existing
before Structure did.
Lately we saw an extra clue in Structure - the extra large 3.5 header was
called 'h0'.
This commit moves all our headers to use a zero based scale, and
additionally uses our 3 digit scale as opposed to 1 digit (h1 vs h100),
similar to our color scales (note we don't use a hypen, which we can
alter later if need be), which means we can insert additional h150 etc
if need be.
Additional we stop styling our headers globally (h1 { @extend %h100; }
). This means there is no reason not to use headers for marking up
content depending on what it is rather than what it should look like,
and as a consequence means we can be more purposeful in ordering h*
tags.
Lastly, we use the new scale over the entire codebase and update a
couple of places where we were using using header tags due to what the
styleing for them looked like rather than what the meaning/order was.
* ui: Add a warning dialog if you go to remove permissions from an intention
* ui: Move modal styles next to component, add warning style
* ui: Move back to using the input name for a selector
* ui: Fixup negative "isn't" step so its optional
* Add warning modal to pageobject
* Fixup test for whether to show the warning modal or not
* Intention change action warning acceptence test
* Add a null/undefined Action
John Cowen