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app/javascript/helpers/debounce.js

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+// https://toughcompetent.com/blog/es5-es6-debounce-react-events-on-inputs/
+function debounce(a,b,c){var d,e;return function(){function h(){d=null,c||(e=a.apply(f,g))}var f=this,g=arguments;return clearTimeout(d),d=setTimeout(h,b),c&&!d&&(e=a.apply(f,g)),e}}
+
+export default debounce;