Dynamic CRM 365 JavaScript best practice

 Dynamic CRM 365 JavaScript best practice:  

These are the 5 refactorings I always do:

 Adding executionContext to functions;

Passing the executionContext is the new way to access Xrm.Page. Make sure you flag ‘Pass execution context as first parameter’. Waiting patiently for Microsoft to make this the default 

 Replacing var with let or const;

Using let or const prevents stupid bugs where you re-declare or overwrite variables when you didn’t mean to.

 Better names for variables;

While I’m replacing var, I also improve the names of the variables to make it clear what their intension is.

 Invert if statements and use early returns;

Remove all those nested if statements and make your code clearer to understand by returning immediately when a condition doesn’t apply or inverting the check in a if statement.

 Use async/await;

Remove promises and .then methods that are nesting your code and replace it with the async/wait pattern to improve your code readability.