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I have a plugin page, which doesn't have header.php or footer.php. How can I include Wordpress jQuery on this page so I can use syntax like below ?

  jQuery(document).ready(function()
  {
      alert('hello');
  });

At the moment it says:

Uncaught ReferenceError: jQuery is not defined
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  • Is the plugin page in admin area or in front end? Please provide a bit more details. – Vinod Dalvi May 18 '17 at 12:52
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    As @VinodDalvi said, this question lacks context. For example why exactly the page lacks calls to header.php – Mark Kaplun May 18 '17 at 13:57
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    looks like you are trying to define jquery.min.js, in the header.php of the theme or in the header/footer section when page loads so your script will run Right ? – Muhammad Abdullah May 18 '17 at 19:33
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Though uncommon, you can use wp_print_scripts( ['jquery'] ) for explicit output.

Note that you might hit issues with hooks firing in unexpected ways and such. Generally all WP pages on front end should just implement header/footer properly.

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Use wp_head(); and wp_footer(); if you're putting all html in just one file.

Although I would suggest making custom header for your plugin page. Which will have <head>, <html> and other necessary tags. Same with footer. eg. header-plugin.php and the use get_header('plugin');

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