dispatchEvent on input/textarea is ignored · Issue #10135 · facebook/react (github.com)

function setNativeValue(element, value) {
 var valueSetter = Object.getOwnPropertyDescriptor(element, 'value').set;
 var prototype = Object.getPrototypeOf(element);
 var prototypeValueSetter = Object.getOwnPropertyDescriptor(prototype, 'value').set;

  if (valueSetter && valueSetter !== prototypeValueSetter) {
    prototypeValueSetter.call(element, value);
  } else {
    valueSetter.call(element, value);
  }
  element.dispatchEvent(new Event('input', { bubbles: true }));
}