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javascript: (function () { | |
var el = document.createElement('pre'), | |
b = document.getElementsByTagName('body')[0], | |
otherjQuery = false, | |
msg = '', | |
libs = [ | |
function loadjQuery() { | |
if (typeof jQuery != 'undefined') { | |
showMsg('This page already using jQuery v' + jQuery.fn.jquery); | |
} else { | |
if (typeof $ == 'function') { | |
otherjQuery = true; | |
} | |
getScript('//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js', function () { | |
if (typeof jQuery == 'undefined') { | |
showMsg('Sorry, but jQuery wasn\'t able to load') | |
} else { | |
showMsg('This page is now jQuerified with v' + jQuery.fn.jquery + otherjQuery ? ' and noConflict(). Use $jq(), not $().' : ''); | |
} | |
}); | |
} | |
}, | |
function loadLodash() { | |
if (typeof _ != 'undefined') { | |
showMsg('This page already using lodash v' + _.VERSION); | |
} | |
getScript('//cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js', function () { | |
showMsg('This page now has lodash v' + _.VERSION); | |
}); | |
} | |
]; | |
el.style.position = 'fixed'; | |
el.style.top = '0'; | |
el.style.padding = '5px 10px'; | |
el.style.zIndex = 9001; | |
el.style.fontSize = '12px'; | |
el.style.color = '#222'; | |
el.style.backgroundColor = '#f99'; | |
function getScript(url, success) { | |
var script = document.createElement('script'); | |
script.src = url; | |
var head = document.getElementsByTagName('head')[0], | |
done = false; | |
script.onload = script.onreadystatechange = function () { | |
if (!done && (!this.readyState || this.readyState == 'loaded' || this.readyState == 'complete')) { | |
done = true; | |
success(); | |
script.onload = script.onreadystatechange = null; | |
head.removeChild(script); | |
} | |
}; | |
head.appendChild(script); | |
} | |
function showMsg(msg) { | |
if (!document.body.contains(el)) { | |
b.appendChild(el); | |
} | |
el.appendChild(document.createTextNode(msg + '\n')); | |
window.setTimeout(function () { | |
if (typeof jQuery == 'undefined') { | |
b.removeChild(el); | |
} else { | |
jQuery(el).fadeOut('slow', function () { | |
jQuery(this).remove(); | |
}); | |
if (otherjQuery) { | |
$jq = jQuery.noConflict(); | |
} | |
} | |
}, 2500); | |
} | |
libs.forEach(function (init) { | |
init(); | |
}) | |
})(); |
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