By understanding the Abstract Syntax Tree (AST) better, optimizing for semantic simplicity, and prettifying deliver better results and code for manual review.
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Step
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Resolve references
Using a custom Javascript interpreter, the tree is walked and references are resolved.
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Improved semantic understanding for the analysis engine.
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Improved user experience when reading the code, better showing the intent of the code.
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Step
02
Iterative optimization process
jswzl has a library of optimizers which transforms the code to better show intent, and undoing certain minification to improve semantic clarity.
Example: Collapsing string operations
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var apiHost = "https://api.example.com";
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var apiBasePath = "api/";
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var requestPath = `{apiHost}{apiBasePath}` + "v1/".concat("users");
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var requestPath = `https://api.example.com/api/v1/users`;
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Step
03
Code is prettified
The code is prettified, making it easier to read for a human.
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if (isValid(input)) { process(input); } else { showError(); }
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if (isValid(input)) {
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process(input);
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} else {
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showError();
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);
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- Optimizers
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Optimizer highlights
These are just some examples of the many optimizations employed by jswzl to make analysis easier.
JSON.parse
When a JSON.parse call is made with a static value, it's converted directly into its object form, making reference resolution easier.
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var x = JSON.parse("{'foo':'bar'}");
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var x = {'foo':'bar'};
String simplification
Strings can be concatenated together in multiple ways. Here we see how the simplify the expression to its resolved form.
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var v1 = "v1/";
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var api = v1 + "api/"
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var api = "v1/api/";
But what if it can't resolve the variable? It can also turn it into a Template Literal instead:
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var api = v1 + "api/"
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var api = "{v1}/api/";
But you can combine strings in many different ways. No matter, it'll all be simplfied down!
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var api = `{v1.concat("api/")}` + "".concat(['us', 'ers/'])
