rgba-to-rgb/dist/index.js

Color conversion function

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var invariant = require("invariant");
exports.default = (function (background, color) {
    if (background === void 0) { background = ''; }
    if (color === void 0) { color = ''; }
    var b = background.match(/rgb\((-?\d{1,3}),\s*(-?\d{1,3}),\s*(-?\d{1,3})\)/);
    var c = color.match(/rgba\((-?\d{1,3}),\s*(-?\d{1,3}),\s*(-?\d{1,3}),\s*([0-1]?(?:\.\d+)?)\)/);
    invariant(b !== null && b.length === 4, "rgba-to-rgb: background should be in 'rgb(r, g, b)' format, got '" + background + "'.");
    invariant(c !== null && c.length === 5, "rgba-to-rgb: color should be in 'rgba(r, g, b, a)' format, got '" + color + "'.");
    var _a = b, bRed = _a[1], bGreen = _a[2], bBlue = _a[3];
    var _b = c, cRed = _b[1], cGreen = _b[2], cBlue = _b[3], cAlpha = _b[4];
    var red = (1 - +cAlpha) * +bRed + +cAlpha * +cRed;
    var green = (1 - +cAlpha) * +bGreen + +cAlpha * +cGreen;
    var blue = (1 - +cAlpha) * +bBlue + +cAlpha * +cBlue;
    return "rgb(" + Math.round(red) + ", " + Math.round(green) + ", " + Math.round(blue) + ")";
});
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