document.addEventListener('DOMContentLoaded', function() {
'use strict';
if (!window.playgroundUrl) {
return;
}
var featureRegexp = new RegExp('^\s*#!\\[feature\\(\.*?\\)\\]');
var elements = document.querySelectorAll('pre.rust-example-rendered');
Array.prototype.forEach.call(elements, function(el) {
el.onmouseover = function(e) {
if (el.contains(e.relatedTarget)) {
return;
}
var a = el.querySelectorAll('a.test-arrow')[0];
var code = el.previousElementSibling.textContent;
var channel = '';
if (featureRegexp.test(code)) {
channel = '&version=nightly';
}
a.setAttribute('href', window.playgroundUrl + '?code=' +
encodeURIComponent(code) + channel);
};
});
});