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| if (typeof $.fn != 'undefined' && typeof $.fn.jquery != 'undefined') {
console.log("jquery " + $.fn.jquery + " already exist");
} else {
var script = document.createElement('script');
script.setAttribute('type', 'text/javascript');
script.setAttribute('src', 'https://code.jquery.com/jquery-3.3.1.min.js');
document.body.appendChild(script);
console.log("jquerfied");
}
|