Adding jQuery to Your WordPress Website

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Adding jQuery to Your WordPress Website
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• jQuery is the most popular JavaScript library. It
  allows to highly simplify the front-end
  development as it offers a lot of ready-made
  plugins. Instead of creating something new, you
  can just add the plugin and solve any issue with
  the website.It is also very often used in
  WordPress to simplify the front-end part of the
  website. Moreover, it is even added to WordPress
  by default. When you install a new template for
  your website, you may face a situation where, due
  to the old version of jQuery connected to
  WordPress, the additional functionality you need
  does not work.

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What is jQuery?

• To better understand WordPress jQuery, the first
  thing you need to do is to brush up on your
  basics about javascript. It is one of the
  prominent languages that is generally used to
  make changes, do calculations and validate data
  on a website.
• In addition to that, with the help of javascript,
  you can also make changes or update HTML and CSS.
  In simple words, you can freely make rules and
  design your website structure and content. It is
  all possible due to the availability of a wide
  range of different script libraries.

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Why You Should Use WordPress jQuery?

• When using WordPress jQuery, you will find there
  are plenty of advantages that you didnt think
  of. Apart from its use in creating dynamic and
  appealing functionalities on your website, it can
  also help to reduce your limited bandwidth
  congestion.

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What is the is not a function WordPress
Error?

• If you are using WordPress, by default it is
  unable to understand as jQuery, due to which
  it will trigger an error message is not a
  function WordPress error on your screen. It
  actually occurs when the code starts to execute
  just before the jQuery library.
• Let us understand it with an example, suppose a
  theme or plugin is calling a code before calling
  the right jQuery library, the error will occur.

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Using instead of jQuery in WordPress

• The trick here is that by default the copy of
  jQuery works in a compatibility mode. This means
  that the well-known shortcut will not work.
  This is done not to create conflicts with other
  JavaScript libraries using the dollar sign, for
  example, MooTools or Prototype.
• Many plugin creators and theme developers know
  about this and use jQuery instead of to make
  the product secure.

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How to Add jQuery to WordPress Custom Theme or
Plugin?

• To run the jQuery scripts on the WordPress
  website, you need to add the appropriate
  libraries. But fortunately, the WordPress
  structure already includes all the necessary
  libraries. To make them work, you just need to
  connect them to your theme.

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How jQuery Connects to WordPress?

• In WordPress, the jQuery library is automatically
  connected, if in your template you have the
  following PHP code in the HEAD section
• lt?php wp_head() ?gt