通过以编程方式更改文本框值来调用Javascript onchange事件

document.getElementById("myText").addEventListener("change", myFunction);

var observer = new MutationObserver(function(mutations) {
  mutations.forEach(function(mutation) {
    if (mutation.type === 'childList') {
      console.log('A child node has been added or removed.');
    }
    else if (mutation.type === 'attributes') {
      console.log('The ' + mutation.attributeName + ' attribute was modified.');
    }
  });
});

var targetNode = document.getElementById('myText');
var config = { attributes: true, childList: true, subtree: true };
observer.observe(targetNode, config);

var observer = new MutationObserver(function(mutations) {
  mutations.forEach(function(mutation) {
    if (mutation.type === 'childList') {
      console.log('A child node has been added or removed.');
    }
    else if (mutation.type === 'attributes') {
      console.log('The ' + mutation.attributeName + ' attribute was modified.');
      var event = new Event('change');
      mutation.target.dispatchEvent(event);
    }
  });
});