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-rw-r--r--layout/reftests/bugs/386310-1b-shadow.html23
1 files changed, 23 insertions, 0 deletions
diff --git a/layout/reftests/bugs/386310-1b-shadow.html b/layout/reftests/bugs/386310-1b-shadow.html
new file mode 100644
index 0000000000..9cfa6f477b
--- /dev/null
+++ b/layout/reftests/bugs/386310-1b-shadow.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html>
+ <head>
+ <script src="386310-script.js"></script>
+ <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));
+ }
+ });
+ </script>
+ </head>
+ <body>
+ <template id="template">
+ <span></span>
+ <slot></slot>
+ </template>
+ <custom-element id="test" style="display: block;">first second third [fourth]</custom-element>
+ </body>
+</html>