Implementing the document ready function in a nested jQuery function

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Solution 1:

Scripts can be located anywhere in a document, but it is recommended to place them in the footer for better page load performance. Additionally, to facilitate maintenance, it is advised to group scripts together.

As per the specification, the placement of the

script

tag within the document is not restricted. It can be placed in the header or at the bottom of the body, spread throughout the document or a combination of these options.

Regardless of its position within the document, employing the jQuery construct

$(document).ready

yields identical outcomes. The crucial factor is comprehending the construct’s functionality.

Although JavaScript offers the load event to run code during the page rendering process, it only activates after all resources, like images, have fully downloaded, thus causing a delay in execution.


ready

and

document.onload

are comparable, but not identical. The code’s position in the document is irrelevant when executed during the occurrence of

document.onload

or

ready

by jQuery. The only time code placement matters is if it is not enclosed by an event handler or listener.

The location of

$(document).ready

must be after the inclusion of the jQuery library. Since

$(document).ready

relies on jQuery, it cannot be utilized if jQuery is not present.


    
        
        
    
    
        
    


Documentation

  • The W3 website provides a specification for SCRIPT, which can be found at http://www.w3.org/TR/html401/interact/scripts.html.
  • The W3 website contains the specification for script (HTML 5) as found at http://www.w3.org/TR/html-markup/script.html.
  • Learn how to incorporate Javascript into your website by visiting quirksmode’s tutorial on placing Javascript in your pages, which can be found at http://www.quirksmode.org/js/placejs.html.
  • The jQuery library can be accessed through the code

    ready

    and its documentation for the “ready” method can be found at http://api.jquery.com/ready/.


Solution 2:


As far as I know, the

$(document).ready

event is triggered once the DOM has fully loaded, therefore its placement in the code is irrelevant.

According to their suggestion, placing the script at the end of the body is advised. This is because the page will be displayed to the end-user immediately, while the JavaScript will continue running in the background.


Solution 3:


The script in the head section is executed by the browser before the script in the body as the browser follows a top-to-bottom approach. While I usually place the script below the HTML code, waiting for the page to fully load is generally not critical.

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