尝试在js中声明全局变量时，无法控制输入字段值

var globalVariable;

function updateInputValue() {
  globalVariable = document.getElementById('inputField').value;
}

function printInputValue() {
  console.log(globalVariable);
}

(function() {
  var inputFieldValue;

  function updateInputValue() {
    inputFieldValue = document.getElementById('inputField').value;
  }

  function printInputValue() {
    console.log(inputFieldValue);
  }

  // 在需要的时候调用函数来更新和打印输入字段的值
  updateInputValue();
  printInputValue();
})();

var globalObject = {};

function updateInputValue() {
  globalObject.inputFieldValue = document.getElementById('inputField').value;
}

function printInputValue() {
  console.log(globalObject.inputFieldValue);
}