flow like the river

VISUALIZACION/node_modules/polished/lib/helpers/modularScale.js

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+"use strict";
+
+exports.__esModule = true;
+exports["default"] = modularScale;
+exports.ratioNames = void 0;
+var _getValueAndUnit = _interopRequireDefault(require("./getValueAndUnit"));
+var _errors = _interopRequireDefault(require("../internalHelpers/_errors"));
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+var ratioNames = exports.ratioNames = {
+  minorSecond: 1.067,
+  majorSecond: 1.125,
+  minorThird: 1.2,
+  majorThird: 1.25,
+  perfectFourth: 1.333,
+  augFourth: 1.414,
+  perfectFifth: 1.5,
+  minorSixth: 1.6,
+  goldenSection: 1.618,
+  majorSixth: 1.667,
+  minorSeventh: 1.778,
+  majorSeventh: 1.875,
+  octave: 2,
+  majorTenth: 2.5,
+  majorEleventh: 2.667,
+  majorTwelfth: 3,
+  doubleOctave: 4
+};
+function getRatio(ratioName) {
+  return ratioNames[ratioName];
+}
+
+/**
+ * Establish consistent measurements and spacial relationships throughout your projects by incrementing an em or rem value up or down a defined scale. We provide a list of commonly used scales as pre-defined variables.
+ * @example
+ * // Styles as object usage
+ * const styles = {
+ *    // Increment two steps up the default scale
+ *   'fontSize': modularScale(2)
+ * }
+ *
+ * // styled-components usage
+ * const div = styled.div`
+ *    // Increment two steps up the default scale
+ *   fontSize: ${modularScale(2)}
+ * `
+ *
+ * // CSS in JS Output
+ *
+ * element {
+ *   'fontSize': '1.77689em'
+ * }
+ */
+function modularScale(steps, base, ratio) {
+  if (base === void 0) {
+    base = '1em';
+  }
+  if (ratio === void 0) {
+    ratio = 1.333;
+  }
+  if (typeof steps !== 'number') {
+    throw new _errors["default"](42);
+  }
+  if (typeof ratio === 'string' && !ratioNames[ratio]) {
+    throw new _errors["default"](43);
+  }
+  var _ref = typeof base === 'string' ? (0, _getValueAndUnit["default"])(base) : [base, ''],
+    realBase = _ref[0],
+    unit = _ref[1];
+  var realRatio = typeof ratio === 'string' ? getRatio(ratio) : ratio;
+  if (typeof realBase === 'string') {
+    throw new _errors["default"](44, base);
+  }
+  return "" + realBase * Math.pow(realRatio, steps) + (unit || '');
+}