如何从HTML输入元素中检索'value‘？

var inputElement = document.getElementById("inputId");
var value = inputElement.value;

var value = $("#inputId").val();

<form id="myForm">
  <input type="text" id="inputId" name="inputName" value="default value">
  <input type="submit" value="Submit">
</form>

<script>
document.getElementById("myForm").addEventListener("submit", function(event) {
  event.preventDefault(); // 阻止表单的默认提交行为
  var value = document.getElementById("inputId").value;
  console.log(value);
});
</script>