unquoted-property-validator

Unquoted JavaScript property name validator

This module checks if a given property name can be used without quotes and/or with dot notation.

It is based on Mathias Bynens brilliant javascript-properties article. So this is a node-port of his website implementation.

Installation

$ npm install unquoted-property-validator --save

Usage

var unquotedValidator = require('unquoted-property-validator');

var results = unquotedValidator('myCoolLiteral');
console.log(results);
/* {
    needsQuotes: false,
    needsBrackets: false,
    es3Warning: false,
    quotedValue: 'myCoolLiteral'
   }
*/

In ES6/Typescript the first line should look like this instead:

import unquotedValidator = require('unquoted-property-validator');

Results

Your property input will be checked and you will get 3 flags as output:

needsQuotes

Quotes can only be omitted if the property name is a numeric literal or a valid identifier name:

var obj = {
        nonQuoted: true,
        'must-be-quoted' : true
    };

needsBrackets

Dot notation can only be used when the property name is a valid identifier name:

obj.bracketFree = true; //use the supreme dot notation
obj['requires-brackets'] = true; //string must be inside brackets to be used as property

es3Warning

Should you want to support ES3, you cannot use some identifiers:

obj['var'] //-> invalid in ES3
var obj = {
        goto: true //-> invalid in ES3
    };

quotedValue

Your quoted string in case there are problematic characters.

API

unquotedValidator(input)

input

Type: String

Property to validate

License

MIT © Gilad Peleg