JavaScript Parser and Analyzer in C# .NET 4.5

Question

Not sure if the title explains it correctly.

Anyways, I'm building a .NET WPF application which should go through the JavaScript and identify issues such as

If the variables defined are being nullified at the end
If try/catch/finally blocks are being used.
Function calls

I went through the questions over here which were all revolving around c/c++. Now I regret bunking my compilers classes.

I wanted to know how to verify points 1-3 in C#. Any library out there which does this?

Edited the question. Eg. I want to check in C#, if a variable defined in a JS function is being nullified or not. — Dev
– Dev, Commented Jan 16, 2013 at 10:20
I would suggest that you take a look at V8, the JavaScript engine of Google. There is a similar SO question (and answer) on how to use V8 from within C#/.NET. With this engine, you could compile your script and let it run, possibly seeing compiler warnings/errors. — Uwe Keim
– Uwe Keim, Commented Jan 16, 2013 at 10:35
BTW: Why do you consider "function calls" as being issues? I think function calls are a pretty good thing, actually! — Uwe Keim
– Uwe Keim, Commented Jan 16, 2013 at 10:38
Thanks for the link. I don't think it'll throw any warnings for the issues 1 and 2. And, by 3 I meant to write External Library Function calls. — Dev
– Dev, Commented Jan 16, 2013 at 10:53

Ryan · Accepted Answer · 2022-05-06 15:40:09Z

5

What you're looking for is an abstract syntax tree parser for Javascript written in C#.

There are a few choices I know of:

Microsoft's Ajax Minifier library comes with its own AST parser (used to minify / optimize Javascript files). You can find the source code for that on GitHub.

Esprima.net is another option. It's a port of the popular Javascript library Esprima.

The good thing about Esprima is it outputs the AST in a common format (defined by Mozilla here) that's used across a few parsers, making it really easy to port utilities for walking the tree, etc. since they all use the same underlying data structure.

edited May 6, 2022 at 15:40

Ryan

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answered Jul 8, 2014 at 13:27

Cuong Vo

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LiquaFoo · Accepted Answer · 2013-01-16 16:05:38Z

3

Check out IronJS I know they have a pretty good JavaScript library for .Net

IronJS

answered Jan 16, 2013 at 16:05

LiquaFoo

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