ERW heavily relies on browser compliance with respect to a number of standards. Presently only Mozilla (and thus Gecko-based browsers, such as Netscape 6 or Galeon), Konqueror (and thus KHTML-based browsers, such as Safari) and Microsoft® Internet Explorer from version 5.5 up have a sufficiently compliant implementation of these standards to work properly. If ERW detects a browser with insufficient capabilities, it will warn the user.
ERW use all features of the W3C standard, including
lesser-known elements such as
ERW uses CSS1 and some features of CSS2.
ERW access and dynamically updates HTML elements using Level 1 of the W3C Document Object Model specification, plus bits of Level 2 (mainly for style).