5 let bc
= new BroadcastChannel("test_same_url");
9 var link
= document
.getElementById("link1");
17 bc
.addEventListener("message", listener
);
20 <body onpageshow=
"bc.postMessage({bodyOnLoad: history.length})">
21 <a id=
"link1" href=
"file_same_url.html">Link
1</a>
22 <a name=
"1">link
1</a>