将项添加到数据绑定DropDownList

var data = ["Option 1", "Option 2", "Option 3"];

</select><script>
var data = ["Option 1", "Option 2", "Option 3"];
var dropDown = document.getElementById("myDropDown");

data.forEach(function(item) {
  var option = document.createElement("option");
  option.value = item;
  option.text = item;
  dropDown.add(option);
});
</script>

data.push("Option 4");

dropDown.innerHTML = "";

data.forEach(function(item) {
  var option = document.createElement("option");
  option.value = item;
  option.text = item;
  dropDown.add(option);
});