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<!DOCTYPE html>
<html class="reftest-wait">
<style>
textarea {
min-height: 100px;
}
</style>
<div>
<iframe src="about:blank"></iframe>
</div>
<script>
let div = document.querySelector('div');
let iframe = document.querySelector('iframe');
iframe.onload = function() {
let doc = iframe.contentDocument;
let e = doc.createElement('textarea');
doc.body.appendChild(e);
setTimeout(function() {
getComputedStyle(e).minHeight;
div.style.display = 'none';
setTimeout(function() {
getComputedStyle(e).minHeight;
document.documentElement.className = "";
}, 0);
}, 0);
};
</script>
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