refactor: convert redColorScaleGenerator.js to TypeScript #125

Author: gingerbeerlime

src/helper/index.js

@@ -1,3 +1,3 @@
 export { default as defaultProps } from './defaultProps.js'
-export { redColorScaleGenerator } from './redColorScaleGenerator.js'
+export { redColorScaleGenerator } from './redColorScaleGenerator'
 export * from './utilities.js'

src/helper/redColorScaleGenerator.js src/helper/redColorScaleGenerator.tssrc/helper/redColorScaleGenerator.js renamed to src/helper/redColorScaleGenerator.ts

@@ -1,7 +1,7 @@
-export function redColorScaleGenerator(values) {
+export function redColorScaleGenerator(values: number[]) {
   const min = Math.min.apply(Math, values)
   const max = Math.max.apply(Math, values)
-  return (x) => {
+  return (x: number) => {
     const nonRed = 255 - Math.round((255 * (x - min)) / (max - min))
     return { backgroundColor: `rgb(255,${nonRed},${nonRed})` }
   }