点击弹窗关闭按钮将指定error元素display属性设为block的技术问题

Got it, let's get this sorted for you! You want your popup's dismiss button to do two things: hide the popup itself, and show that hidden error_dismissed element. Here are two straightforward ways to implement this:

Vanilla JavaScript Solution (No Libraries Needed) #

First, we'll target the dismiss button and your hidden error element, then attach a click handler that handles both actions:

// Wait for the DOM to be fully loaded before accessing elements
document.addEventListener('DOMContentLoaded', function() {
  // Replace these selectors with your actual button and popup IDs/classes
  const dismissButton = document.querySelector('#popup-dismiss-btn');
  const popup = document.querySelector('#your-popup-element');
  const errorElement = document.getElementById('error_dismissed');

  // Add click event listener to the dismiss button
  dismissButton.addEventListener('click', function() {
    // Hide the popup
    popup.style.display = 'none';
    
    // Show the error element by changing display to block
    errorElement.style.display = 'block';
  });
});

Quick note: Make sure to replace #popup-dismiss-btn and #your-popup-element with the actual IDs (or class selectors, if you use classes) for your dismiss button and popup container.

jQuery Solution (If You're Using jQuery) #

If your project already uses jQuery, this can be written more concisely:

// Wait for the DOM to load
$(document).ready(function() {
  // Replace with your dismiss button's selector
  $('#popup-dismiss-btn').on('click', function() {
    // Hide the popup
    $('#your-popup-element').hide();
    
    // Show the error element
    $('#error_dismissed').show();
  });
});

Key Things to Remember #

• Always make sure your code runs after the DOM is fully loaded—otherwise, your script might try to access elements that haven't been rendered yet, causing errors. The examples above handle this with DOMContentLoaded (vanilla JS) and $(document).ready() (jQuery).
• If you're using a framework like React or Vue, the approach would be slightly different (using state to toggle visibility), but since you mentioned vanilla HTML/CSS/JS, the above solutions should work perfectly.

内容的提问来源于stack exchange，提问作者jmbronson