Why Does Using jQuery\'s append() Method Sometimes Prevent Onload Events from Firing for Scripts?

Loading Scripts Sequentially with Onload Event

When attempting to load scripts in a specific order, it's crucial to ensure that the onload event is triggered as expected. However, using jQuery's append() method to add script elements to the DOM can sometimes prevent the onload event from firing.

Solution:

To resolve this issue, it's necessary to make two adjustments:

1. Set src attribute after onload event: Assign the src attribute to the script element after attaching the onload event. This guarantees that the script will not attempt to load before the event is set.

el.onload = function() {
   el.src = script;
};

2. Append script to DOM before onload event: Add the script element to the DOM before attaching the onload event. This ensures that the script element is already in the DOM when the onload event is triggered.

$body.append(el);
el.onload = function() {
   el.src = script;
};

Additional Considerations:

• For optimal cross-browser support, check the readystate for IE compatibility.
• Alternatively, jQuery provides the getScript() method, which simplifies the process of loading and executing scripts.

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