esshorten2

$3

* support shortten module script, vars define in module can be shortten
* mangle support two new Config: ecmaVersion, sourceType which is support in escope

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esshorten provides name mangler, this shorten names in JavaScript code. mangler accepts JavaScript AST and generate modified AST with shortened names.

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We can use this with,

``js
esshorten.mangle(AST);
`

And we can pass options to mangler,

`js
esshorten.mangle(AST, {
// If false, AST is copied deeply (default: true)
destructive: false,
// If false, avoid JSC bug (default: false)
distinguishFunctionExpressionScope: false,
ecmaVersion: 6 // 5 , 6,
sourceType: 'script' // script or module, nodejs using module type
});
``

When destructive option is set to false, esshorten copies AST and modifies it.

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Copyright (C) 2013 Yusuke Suzuki
(twitter: @Constellation) and other contributors.

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