treemap-squarify/src/helpers/index.js

Calculates the treemap coordinates following the squarify algorithm

exports.getMaximum = (array) => Math.max(...array);

exports.getMinimum = (array) => Math.min(...array);

exports.sumReducer = (acc, cur) => acc + cur;

exports.roundValue = (number) => Math.max(Math.round(number * 100) / 100, 0);

exports.validateArguments = ({ data, width, height }) => {
  if (!width || typeof width !== 'number' || width < 0) {
    throw new Error('You need to specify the width of your treemap');
  }
  if (!height || typeof height !== 'number' || height < 0) {
    throw new Error('You need to specify the height of your treemap');
  }
  if (!data || !Array.isArray(data) || data.length === 0 || !data.every((dataPoint) => Object.prototype.hasOwnProperty.call(dataPoint, 'value') && typeof dataPoint.value === 'number' && dataPoint.value >= 0 && !Number.isNaN(dataPoint.value))) {
    throw new Error('You data must be in this format [{ value: 1 }, { value: 2 }], \'value\' being a positive number');
  }
};