问如何等待输入被填充到html页面，然后在javascript中将其值打印到控制台？

EN

const inputNode = document.getElementById('input');
const buttonNode = document.getElementById('button');

buttonNode.addEventListener('click', () => {
  const inputValue = inputNode.value;
  
  // do what ever you wan't
});

<input id="input" type="text" />
<button id="button">Click</button>

// This function is called by the HTML code onclick on the button
var get_content_of_input = function(){
    var user_input = document.getElementById("text_field").value;
    // Now you can use the variable user_input containing the text
}

<input id="text_field">Please enter Text</input>
<button id="button" onclick="get_content_of_input()">Click here to sumbit</button>