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-rw-r--r--layout/reftests/bugs/482592-1b-shadow.xhtml29
1 files changed, 29 insertions, 0 deletions
diff --git a/layout/reftests/bugs/482592-1b-shadow.xhtml b/layout/reftests/bugs/482592-1b-shadow.xhtml
new file mode 100644
index 0000000000..d5594723b4
--- /dev/null
+++ b/layout/reftests/bugs/482592-1b-shadow.xhtml
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" class="reftest-wait">
+ <head>
+ <script>
+ customElements.define("custom-element", class extends HTMLElement {
+ constructor() {
+ super();
+ const template = document.getElementById("template");
+ const shadowRoot = this.attachShadow({mode: "open"})
+ .appendChild(template.content.cloneNode(true));
+ }
+ });
+ function doTest() {
+ var l = document.getElementById("l");
+ l.parentNode.insertBefore(document.createTextNode("y"), l);
+ document.documentElement.removeAttribute("class");
+ }
+ </script>
+ </head>
+ <body onload="doTest()">
+ <template id="template">
+ <style>
+ #hasBefore::before { content: "x"; }
+ </style>
+ <span id="hasBefore"><slot/></span>
+ </template>
+ <custom-element style="font-size: 300%; display: block;"><span id="l"></span></custom-element>
+ </body>
+</html>