获取输入值javascript

var name = prompt("请输入您的姓名：");
console.log("您输入的姓名是：" + name);

<form>
  <label for="name">姓名：</label>
  <input type="text" id="name" name="name">
  <button onclick="getValue()">获取值</button>
</form>

<script>
function getValue() {
  var name = document.getElementById("name").value;
  console.log("您输入的姓名是：" + name);
}
</script>

<input type="text" id="name" name="name">
<button onclick="getValue()">获取值</button>

<script>
function getValue() {
  var name = document.getElementById("name").value;
  console.log("您输入的姓名是：" + name);
}

document.getElementById("name").addEventListener("keyup", function(event) {
  if (event.keyCode === 13) {
    getValue();
  }
});
</script>