"use strict"; var keypressSlider = document.querySelector(".slider-keypress"); var input0 = document.querySelector(".input-with-keypress-0"); var input1 = document.querySelector(".input-with-keypress-1"); var inputs = [input0, input1]; noUiSlider.create(keypressSlider, { start: [128, 176], connect: true, range: { min: [128], max: [176] } }); keypressSlider.noUiSlider.on("update", function(values, handle) { inputs[handle].value = values[handle]; function setSliderHandle(i, value) { var r = [null, null]; r[i] = value; keypressSlider.noUiSlider.set(r); } inputs.forEach(function(input, handle) { input.addEventListener("change", function() { setSliderHandle(handle, this.value); }); input.addEventListener("keydown", function(e) { var values = keypressSlider.noUiSlider.get(); var value = Number(values[handle]); var steps = keypressSlider.noUiSlider.steps(); var step = steps[handle]; var position; switch (e.which) { case 13: setSliderHandle(handle, this.value); break; case 38: position = step[1]; if (position === false) { position = 1; } if (position !== null) {setSliderHandle(handle, value + position); } break; case 40: position = step[0]; if (position === false) { position = 1; } if (position !== null) { setSliderHandle(handle, value - position); } break; } }); }); });