How does the "async" attribute affect script loading and execution?

  • It allows the script to be executed as soon as it’s available, without waiting for the page to be loaded. 
  • It forces the script to load synchronously. 
  • It makes the script execution wait for the DOM to be parsed. 
  • It stops the script from loading until all other resources are loaded. 
The "async" attribute allows the script to be fetched in the background without blocking the parsing of the HTML document. Once the script is available, it's executed immediately, without waiting for the entire page to be loaded. This can improve performance but also means that the script might be executed before the DOM is fully parsed. 
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