estree-to-babel
v10.0.1
Published
convert estree ast to babel
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Estree-to-babel
Convert ESTree
-compatible JavaScript AST
to Babel AST
.
To use parsers like:
With babel
tools like:
The thing is @babel/parser
has a little differences with estree
standard:
Property
ofObjectExpression
andObjectPattern
calledObjectProperty
;FunctionExpression
of aProperty
located inObjectMethod
node;File
node;StringLiteral
,NumericLiteral
,NullLiteral
,RegExpLiteral
,BooleanLiteral
instead ofLiteral
;ClassMethod
instead ofMethodDefinition
;ClassPrivateMethod
;ClassPrivateName
stores name asIdentifier
inid
field;ClassPrivateProperty
instead ofFieldDefinition
;OptionalMemberExpression
andOptionalCallExpression
instead ofChainExpression
;ImportDeclaration
andExportNamedDeclaration
hasattributes
;JSXText
hasextra
field;- etc...
Also @babel/parser
has differences with typescript-estree
:
ClassPrivateProperty
instead ofPropertyDefinition
whenkey.type=PrivateName
;ClasseProperty
instead ofPropertyDefinition
whenkey.type=Identifier
;PrivateName
instead ofPrivateIdentifier
;TSQualifiedName
instead ofMemberExpression
inTSInterfaceHeritage
;TSDeclaredMethod
withabstract=true
instead ofTSAbstractMethodDefinition
;- etc...
estree-to-babel
aims to smooth this differences.
Install
npm i estree-to-babel
Example
const cherow = require('cherow');
const toBabel = require('estree-to-babel');
const traverse = require('@babel/traverse').default;
const ast = toBabel(cherow.parse(`
const f = ({a}) => a;
`));
traverse({
ObjectProperty(path) {
console.log(path.value.name);
// output
'a';
},
});
License
MIT