ractive/src/parse/Parser/expressions/shared/key.js

Next-generation DOM manipulation

import getStringLiteral from 'parse/Parser/expressions/primary/literal/stringLiteral/_stringLiteral';
import getNumberLiteral from 'parse/Parser/expressions/primary/literal/numberLiteral';
import patterns from 'parse/Parser/expressions/shared/patterns';

var identifier = /^[a-zA-Z_$][a-zA-Z_$0-9]*$/;

// http://mathiasbynens.be/notes/javascript-properties
// can be any name, string literal, or number literal
export default function ( parser ) {
	var token;

	if ( token = getStringLiteral( parser ) ) {
		return identifier.test( token.v ) ? token.v : '"' + token.v.replace( /"/g, '\\"' ) + '"';
	}

	if ( token = getNumberLiteral( parser ) ) {
		return token.v;
	}

	if ( token = parser.matchPattern( patterns.name ) ) {
		return token;
	}
}