UNPKG

chroma-js

Version:

JavaScript library for color conversions

44 lines (42 loc) 1.42 kB
import Color from '../Color.js'; import { type } from '../utils/index.js'; Color.prototype.set = function (mc, value, mutate = false) { const [mode, channel] = mc.split('.'); const src = this[mode](); if (channel) { const i = mode.indexOf(channel) - (mode.substr(0, 2) === 'ok' ? 2 : 0); if (i > -1) { if (type(value) == 'string') { switch (value.charAt(0)) { case '+': src[i] += +value; break; case '-': src[i] += +value; break; case '*': src[i] *= +value.substr(1); break; case '/': src[i] /= +value.substr(1); break; default: src[i] = +value; } } else if (type(value) === 'number') { src[i] = value; } else { throw new Error(`unsupported value for Color.set`); } const out = new Color(src, mode); if (mutate) { this._rgb = out._rgb; return this; } return out; } throw new Error(`unknown channel ${channel} in mode ${mode}`); } else { return src; } };