jsane

Adding sanity checks and data tracing to your JavaScript code. Experimental and work in progress.

Instead of

Cannot call undefined

 Cannot call f() because f is undefined. History:
   f = this.some_other      at myfile:46
   this.some_other = foo    at myfile:22
   new Bar(foo = null)      at myfile:1324

##Usage

TODO

##Runtime checks

This is a non-exhaustive list of all checks that JSane provides. Most of these include data traces in their diagnostics, making it easier to narrow down the root cause of a suspected bug.

W0: An arithmetic expression propagates a non-numeric or non-finite operand value to its result, for example undefined * 2 yields NaN
W1: An arithmetic expression is invoked with a non-numeric or non-finite operand, but its result is a valid number, hiding a potential bug. For example 2 + null yields 2
E2: A non-callable object is called, for example var a = undefined; a();.

Disabling checks

Disable for a single line of code

 // JSane: ignore
 ... this line is not checked
 ... this is checked again```

Or for a whole block

 // JSane: off
 
    ... all of this is non-checked
 
 // JSane: on
 ... this is checked again```

acgessler/jsane

jsane

Disabling checks