CSS Custom Properties IE11 Test

root custom property

                .root-cp {
                    background:var(--green);
                }

non root custom property

                body {
                    --non-root-cp:green;
                }
                .non-root-cp {
                    background:var(--non-root-cp);
                }

fallback

                .fallback {
                    background-color:var(--notdefined, green);
                }

chaining

                .chaining {
                    --a:var(--green);
                    --b:var(--a);
                    --c:var(--b);
                    background-color:var(--c);
                }

:hover (please hover to test)

                #hover {
                    background-color:#ccc;
                }
                #hover:hover {
                    background-color:var(--green);
                }

:target (please click to make it the target)

                #target {
                    background-color:#ccc;
                }
                #target:target {
                    background-color:var(--green);
                }

:focus (please click to get focus)

                #focus {
                    background-color:#ccc;
                }
                #focus:focus {
                    background-color:var(--green);
                }

::before

                .before::before {
                    content:'';
                    position:absolute;
                    top:0; left:0; right:0; bottom:0; z-index:0;
                    background-color:var(--green);
                }

attribute (ie-style="")

                see the attribute in dev-tools

parent dom change

                body {
                    --dom-changed-green:red; /* todo? if this is not set, the polyfill does not know that this test is a target */
                }
                body.dom_changed {
                    --dom-changed-green:green;
                }
                .dom_change {
                    background-color:var(--dom-changed-green);
                }

svg

                #svg rect {
                    fill:var(--green);
                }

js computedStyle.getPropertyValue

js setProperty

                #js_setP {
                    background-color:var(--myGreen);
                }

media-query

                @media (min-width: 10px) {
                    #media  {
                        background:var(--green);
                    }
                }

!important getter

                .important-getter {
                    background-color:var(--green) !important;
                }
                #important-getter {
                    background-color:var(--red);
                }

!important setter

                .important-setter {
                    background-color:var(--green);
                    --green:green !important;
                }
                #important-setter {
                    --green:red;
                }

non-inherited registered property

                body {
                    --not-inherited:red;
                }
                #register-property-no-inherit {
                    background-color:var(--not-inherited);
                }

later added html

                #addLater[active] {
                    background-color:green;
                }