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0.3.1 • Public • Published


An ini file compatible properties reader for Node.JS


The easiest installation is through NPM:

npm install properties-reader

Or clone the repo git clone and import the /src/PropertiesReader.js script.


Read properties from a file:

var PropertiesReader = require('properties-reader');
var properties = PropertiesReader('/path/to/properties.file');

The properties are then accessible either by fully qualified name, or if the property names are in dot-delimited notation, they can be access as an object:

// fully qualified name
var property = properties.get('');

// by object path
var property = properties.path();

To read more than one file, chain calls to the .append() method:


To read properties from a string, use the .read() method:' = Value \n = Another Value');

To set a single property into the properties object, use .set():

properties.set('', 'Property Value');

When reading a .ini file, sections are created by having a line that contains just a section name in square brackets. The section name is then prefixed to all property names that follow it until another section name is found to replace the current section.

# contents of properties file
some.thing = foo

some.thing = bar

// reading these back from the properties reader
properties.get('main.some.thing') == 'foo';
properties.get('blah.some.thing') == 'bar';

Checking for the current number of properties that have been read into the reader:

var propertiesCount = properties.length;

The length is calculated on request, so if accessing this in a loop an efficiency would be achieved by caching the value.

When duplicate names are found in the properties, the first one read will be replaced with the later one.

To get the complete set of properties, either loop through them with the .each((key, value) => {}) iterator or use the convenience method getAllProperties to return the complete set of flattened properties.

Saving changes

Once a file has been read and changes made, saving those changes to another file is as simple as running:

// async/await ES6
const props = new PropertiesReader(filePath);

// tradtitonal
const props = new PropertiesReader(filePath);

// ES5 callback style, function then(err, data) { ... });

// ES5 promise style, onSaveError);

Data Types

Properties will automatically be converted to their regular data types when they represent true/false or numeric values. To get the original value without any parsing / type coercion applied, use properties.getRaw('').


If you find bugs or want to change functionality, feel free to fork and pull request.


npm i properties-reader

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