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<!DOCTYPE html>
<meta charset="utf-8">
<script src="util.js"></script>
<body>
<pre contenteditable id="test">
</pre>
<script>
window.onload = function() {
// Create 10000 lines of editable text.
let text = "";
for (let i = 0; i < 10000; i++) {
text += "Line " + i + "\n";
}
testElem = document.getElementById("test");
testElem.textContent = text;
testElem.focus(); // FYI: When this runs, the URL bar has focus, thus, this fails to steal focus
flush_layout();
perf_start();
// Move the selection down through 2000 lines...
const sel = getSelection();
sel.setPosition(testElem.firstChild, 0);
for (let i = 0; i < 2000; i++) {
sel.modify("move", "forward", "line");
}
// ...then go to the end, and back up by 2000 lines.
sel.setPosition(testElem, 1);
for (let i = 0; i < 2000; i++) {
sel.modify("move", "backward", "line");
}
perf_finish();
}
</script>