Joseph Wang announced in July 1992 that he was developing a web browser based on Tk, and made the alpha version 0.1 publicly available.
Version 0.4 integrated a much easier installation procedure, a better default color scheme, keyboard traversals and a history mechanism. Version 0.5, released 8 February 1993, introduced support for multiple fonts.
With the release of version 0.7 on 1 May 1993, tkWWW became the first WYSIWYG HTML editor for X11 which was originally written by Nathan Torkington. Another improvement was the ability to start in iconic mode.
tkWWW was developed before the advent of Safe-Tcl, to allow untrusted applications to run from non-privileged accounts. Without such a safeguard, the potential for automatically executing remote scripts was a security issue.
Because tkWWW was based on the Tk framework, it was very easy to expand its functions and to extend its capabilities. Indeed, there were several extensions and applications based on tkWWW.
The short-term plan for tkWWW was to separate the editing and browsing functions, as had already been accomplished for Phoenix. Inline-image support for GIFs and ISMAPs were also already integrated in the first version of Phoenix.
tkWWW has two strictly separated processes: one for the GUI, and another for network interaction and for parsing HTML. The latter is compiled C code based on the CERN libwww library. The front-end GUI is written in Tcl/Tk, which is interpreted at run time.
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