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test.html
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<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8>
<title>innerText Polyfill Test</title>
<style>
#text, body > pre {
border: 1px solid black;
padding: 10px;
}
#code {
display: block;
}
</style>
<script src="./innertext.js"></script>
<script>
function isUsingPolyfill() {
return (typeof(HTMLElement.prototype.__lookupGetter__("innerText")) == "function");
}
function run() {
document.getElementById('out').innerHTML = document.getElementById('text').innerText;
}
</script>
</head>
<body>
<p>This is my attempt at a cross-platform approximation of .innerText.</p>
<p>To my knowledge, it's only enabled in Gecko-based browsers..</p>
<p></p>
<p>Original HTML:</p>
<div id="text">
test
<code>
abc
def
<pre>
one
two
three
</pre>
</code>
</div>
<p>Result (wrapped in a <pre>):</p>
<pre id="out"></pre>
<p>You are <span id="not"></span>using the polyfill.</p>
<button onclick="run();">Run</button>
<script>
document.getElementById('not').innerHTML = isUsingPolyfill() ? '' : 'not ';
</script>
</body>
</html>