HTML DOM Script defer property

Script defer property

Check if the script is executed when the page is resolved:

var x = document.getElementById("myScript").defer

x The output is:

true

The defer property is set or returns whether the script is executed when the page is resolved.

This property reflects the defer property of the label.

Note: The defer property applies only to external scripts (only when using the src property).

Note: There are several ways to execute an external script:

If async is "async": The script executes asynchronously relative to the rest of the page (the script is executed as the page continues to parse)
If you do not use async and defer is "defer": the script will execute when the page is resolved
If you do not use async or defer: Read and execute the script immediately before the browser continues to parse the page

The defer property is supported by all major browsers.

Note: Opera 12 and its previous versions do not support the defer property.

Returns the defer property:

scriptObject .defer

Set the defer property:

scriptObject .defer=true|false

value	describe
true\|false	Specifies whether a script is executed when the page is completed. TRUE - executes the script when the page is completed. False - Do not perform scripts when the page is completed.

Return value:	Boolean value, if the script is executed when the page is resolved, returns true, otherwise false.