Package Exports
- is-reference
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (is-reference) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
is-reference
Utility for determining whether an AST node is a reference.
foo is a reference in these cases:
console.log( foo );
var foo;
function foo () {}
function bar ( foo ) {}
export { foo as x };foo is not a reference in these cases:
var obj = { foo: 1 };
console.log( obj.foo );
export { x as foo };In all cases, foo is an Identifier node, but the two kinds must be treated differently for the purposes of scope analysis etc. (The examples are non-exhaustive.)
Installation
npm install is-referenceUsage
Example using Acorn and estree-walker:
const { parse } = require( 'acorn' );
const { walk } = require( 'estree-walker' );
const isReference = require( 'is-reference' );
const identifiers = [];
const references = [];
const ast = parse( `var a = b.c;` );
walk( ast, {
enter ( node, parent ) {
if ( node.type === 'Identifier' ) identifiers.push( node );
if ( isReference( node, parent ) ) references.push( node );
}
});
identifiers.forEach( node => console.log( node.name ) ); // a, b, c
references.forEach( node => console.log( node.name ) ); // a, bLicense
MIT