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$ Basics

jQuery(String selector [,Element/jQuery context])<br>jQuery(Element/Element[]/Object/jQuery elements)<br>jQuery(String html [, Document doc])<br>jQuery(String html [, Object attributes])jQuery(function(...) f)<br>Note that the prefix 'jQuery' is synonymous with the famous $ jQuery symbol. So all forms of selection here are also applicable to $.(...), which has been used throughout the previous sections in this book. For the last form, the function f is executed when the DOM is ready.<br>.jquery<br>Return a string containing the jQuery version number.<br>$.noConflict([Boolean removeAll])<br>Relinquish jQuery's control of the $ variable. The variable assigned to the returned value will become a new jQuery variable.
RESETRUNFULL
<!DOCTYPE html><html><head>
   <script src="jquery-3.5.1.min.js"></script></head><script>
   $.holdReady(true);
   $(function(){
      jQuery('p').append('Hello');
      alert($({a:10}).prop('a'));  // 10
      j = $.noConflict();
      j('<p>Test</p>').insertAfter('p');
      alert(jQuery('p').jquery);  // 3.5.1
      j = $.noConflict(true);
      alert(jQuery('p').jquery);  // error
   });</script><body>
   <p></p>
   <script>
      if (confirm('Ready?'))$.holdReady(false);
        </script></body></html>