**esprima-compiler** is a es6-compatible javascript minifier written by python.
**esprima-compiler** uses `esprima-python <https://github.com/Kronuz/esprima-python>`__
as javascript parser library
Features
~~~~~~~~
- ES6 support
- Mangling function and variable names
- Ident output
- Obfuscate strings
Installation
~~~~~~~~~~~~
.. code:: shell
pip install esprima-compiler
Examples
~~~~~~~~
Example javascript file
.. code:: javascript
const Aconst = Math.PI, Bconst = "Bconst";
const Cconst = "Cconst";
function add(a, b){
function foo(){
return a+b;
}
return foo();
}
const Dconst="Dconst";
function mul(a, b){
return a*b;
}
const Econst="Econst";
let Alet="Alet";
const Fconst="Fconst", Gconst="Gconst";
Rearrange and mangle variables:
.. code:: shell
python -m esprima_compiler -r --mangle-variable test.js
.. code:: javascript
const Aconst=Math.PI,Bconst="Bconst",Cconst="Cconst";
function add($a,$b){
function foo(){
return $a+$b;
}
return foo();
}
const Dconst="Dconst";
function mul($a,$b){
return $a*$b;
}
const Econst="Econst",Fconst="Fconst",Gconst="Gconst";
let Alet="Alet";
Rearrange variables and mangle variables (include top level) and function names (except top-level):
.. code:: shell
python -m esprima_compiler -r --mangle-variable-top --mangle-function test.js
.. code:: javascript
const $a=Math.PI,$b="Bconst",$c="Cconst";
function add($d,$e){
function $f(){
return $d+$e;
}
return $f();
}
const $d="Dconst";
function mul($e,$f){
return $e*$f;
}
const $e="Econst",$f="Fconst",$g="Gconst";
let $h="Alet";
Rearrange variables and mangle variables and function names (include top level) without identing:
.. code:: shell
python -m esprima_compiler -i 0 -r --mangle-variable-top --mangle-function-top --mangle-function test.js
.. code:: javascript
const $a=Math.PI,$b="Bconst",$c="Cconst";function $d($e,$f){function $g(){return $e+$f;}return $g();}const $e="Dconst";function $f($g,$h){return $g*$h;}const $g="Econst",$h="Fconst",$i="Gconst";let $j="Alet";
API
~~~
Compile javascript string:
.. code:: python
>>> from esprima_compiler.compiler import Compiler
>>> c = Compiler(rearrange=True, mangle_variable=True, mangle_variable_top=True)
>>> js = """
... const A=1;
... const B=2;
... let C=3;
...
... class TestClass extends Object{
... constructor(a, b){
... this._a=a;
... this.b=b;
... }
... static get a(){
... return this._a;
... }
... set b(b){
... this.b=b;
... }
...
... static async sum(){
... return this.a+this.b
... }
... }
... """
>>> buf = c.compile(js)
>>> print(buf.read())
const $a=1,$b=2;
let $c=3;
class TestClass extends Object{
constructor($d,$e){
this._a=$d;
this.b=$e;
}
static get a(){
return this._a;
}
set b($d){
this.b=$d;
}
static async sum(){
return this.a+this.b;
}
}
>>>
