dry

Assuming the myFunction series of functions aren’t used elsewhere, you’d do: var addChangeListener = function(elem, hexInput) { elem.onchange = function() { hexInput.value = elem.value; } }; const elements = { ‘colorpicker01′:’hexinput01’, ‘colorpicker02′:’hexinput02’, ‘colorpicker03′:’hexinput03’} for(elemName in elements) { const elem = document.getElementById(elemName); const hexInput = document.getElementById(elements[elemName]); addChangeListener(elem, hexInput); } And if you need to reuse the … Read more