Introduction to js-quantities

The js-quantities library is a powerful JavaScript tool for handling quantities with units and performing precise calculations. This versatile library supports a wide range of units and offers a plethora of useful APIs for unit conversions, arithmetic operations, and much more.

Getting Started

To use js-quantities, include it in your project via npm:

  npm install js-quantities

Basic Examples

Creating Quantities

You can create quantities using the Qty constructor:

  const Qty = require('js-quantities');
  let length = Qty('1 m');

Unit Conversion

The library allows you to convert quantities to different units:

  let lengthInFeet = length.to('ft'); // 3.28084 ft

Basic Arithmetic Operations

Perform arithmetic operations easily:

  let length1 = Qty('1 m');
  let length2 = Qty('2 m');
  let totalLength = length1.add(length2); // 3 m
  let differenceLength = length2.sub(length1); // 1 m

Complex Operations

Handle more complex operations such as multiplication and division:

  let area = length.mul(length); // 1 m^2
  let speed = Qty('80 km').div('1 hr'); // 80 km/hr

Advanced Usage

Temperature Conversions

Converting temperature units requires a special method:

  let temp = Qty('100 degC');
  let tempInFahrenheit = temp.to('degF'); // 212 degF

Parsing Quantities from Strings

Parse string representations of quantities directly:

  let parsedQty = Qty('5.4 kg');

Using Quantities in Applications

Here’s an example of how to use js-quantities in a simple web application:

  
    
      
Quantity Conversion App
      
      
        grams
        kilograms
        pounds
      
      Convert
      


      
    
  

js-quantities is a comprehensive library that simplifies unit conversions and complex calculations. By incorporating it into your project, you can enhance accuracy and efficiency in your mathematical computations.

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