acorn-umd
v0.4.0
Published
Parse acorn ast for AMD, CommonJS, and ES6 definitions
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acorn-umd
Parse acorn ast for AMD, CommonJS, and ES6 definitions.
The Nodes created align as closely as possible with the nodes generated for acorns ES6 import nodes. Example below
var acorn = require('acorn');
var umd = require('acorn-umd');
var code = `
import {a, b, c as d} from 'library';
import foo from 'foo-library';
let _ = require('lodash');
`;
var ast = acorn.parse(code, {ecmaVersion: 6});
var imports = umd(ast, {
es6: true, amd: false, cjs: true
});
console.log(imports);
[
{ type: 'CJSImport',
reference:
{ type: 'VariableDeclaration',
start: 87,
end: 113,
declarations: [Object],
kind: 'let' },
specifiers: [ [Object] ],
start: 87,
end: 113,
source:
{ type: 'Literal',
reference: [Object],
value: 'lodash',
raw: '\'lodash\'',
start: 103,
end: 111 }
},
{ type: 'ImportDeclaration',
start: 5,
end: 42,
specifiers: [ [Object], [Object], [Object] ],
source:
{ type: 'Literal',
start: 32,
end: 41,
value: 'library',
raw: '\'library\'' }
},
{ type: 'ImportDeclaration',
start: 47,
end: 77,
specifiers: [ [Object] ],
source:
{ type: 'Literal',
start: 63,
end: 76,
value: 'foo-library',
raw: '\'foo-library\'' }
}
]
AMD Imports
let code = `
foo();
define(['foo', 'unused-import'], function($) {
return $();
});
`;
let ast = acorn.parse(code, {ecmaVersion: 6});
let parsed = umd(ast, {
es6: false, amd: true, cjs: false
});
console.log(parsed);
[
{
type: 'AMDImport',
reference: { DEFINE_NODE },
start: 12,
end: 81,
specifiers: [ { type: 'Identifier', start: 54, end: 55, name: '$' } ],
sources:
[ { type: 'Literal',
reference: [Object],
value: 'foo',
raw: '\'foo\'',
start: 20,
end: 25 },
{ type: 'Literal',
reference: [Object],
value: 'unused-import',
raw: '\'unused-import\'',
start: 27,
end: 42 } ],
// Grouped [source, variable] name array
imports: [ [ {SOURCE_NODE}, {VARIABLE_NODE} ], [ {SOURCE_NODE}, undefined ]
}
]
Get the scope of a node
import {sample} from 'lodash'
let parsed = umd(ast, {
es6: false, amd: true, cjs: false
});
let node = sample(parsed);
let scope = node.scope; // scope is null if global otherwise a function node