script with type=importmap must not have defer Web Standard

Description

A script element with type=importmap must not have a defer attribute.

Applicable standards

• HTML

Change history

• 2026.60 Apr 2026 Added.

This page describes a web site issue detected in HTML documents by SortSite Desktop and OnDemand Suite.

Rule ID: W3cHtml5ScriptForbidden-importmap–defer