How Can `async` and `defer` Attributes Improve Website Load Speed?

Script Tag Enhancements: async and defer

To Site Load Speed

1. Async Attribute:

• Adding async to scripts at the bottom of the page allows them to be downloaded and executed concurrently with page loading, potentially improving page speed.
• Placing them at the top of the page in the with async also improves load speed by initiating download early.

2. Defer Attribute:

• Using defer inside for scripts simulates the behavior of having the scripts before the /body tag.
• Defer ensures the scripts are executed in the order they appear on the page, but only after the HTML document has been fully parsed.

Using

Latest Articles by Author

Latest Issues

function_exists() cannot determine the custom function Function test () {return true;} if (function_exists ('test')) {echo "test is function...

From 2024-04-29 11:01:01

0

3

2399

How to display the mobile version of Google Chrome Hello teacher, how can I change Google Chrome into a mobile version?

From 2024-04-23 00:22:19

0

11

2529

The child window operates the parent window, but the output does not respond. The first two sentences are executable, but the last sentence cannot be implemented.

From 2024-04-19 15:37:47

0

1

2146

There is no output in the parent window document.onclick = function(){ window.opener.document.write('I am the output of the child ...

From 2024-04-18 23:52:34

0

1

2021

Where is the courseware about CSS mind mapping? Courseware

From 2024-04-16 10:10:18

0

0

2101

Related Topics

More>

• securefx cannot connect
• What are the data collection technologies?
• Usage of #include in C language
• How to make an iso file
• How to solve filezilla garbled characters
• What to do if the remote desktop cannot connect
• What should I do if my C drive turns red?
• How to recover browser history on computer