Steve Blog

Currently I’m working with a Doors Next Generation (DNG) Extension. As you might know DNG 4.06 will include a Javascript Extension. Before we start with some posts about

DNG Extensions let me give some hints about a Javascript Environment.

Necessary Tools:

• Notepad++
• Chrome Developer Tools
• A working DNG 4.0.6 Environment with Tomcat

Useful Links:

Debugging with Chrome

Debugging RTC Value Provider

Java Script Client Extensions

Data visualisation with D3  and a good D3 learning source is here

Let me just recall (for myself)  the Javascript Style Guide:

• Indents has 4 spaces and line length are 80 characters
• Semicolons are mandatory
• Variables are CamelCase like “myCounter”
• Variables are Nouns  and Javascript Functions start with a verb like “getLastname”
• Constants only consist with uppercase letters and underscores like “MAX_COUNT”
• “undefined” is for variables that are not initialised.
• “null” should only be used in the context of objects.