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警报与 html css 和 javascript 代码中的自定义警报

Mary-Kate Olsen原创: 2024-10-31 09:31:29295浏览

Alert Vs Custom Alert in html css and javascript code

HTML代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Custom Alert Box</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="button-container">
        <!-- Button to Trigger Default Alert -->
        <button class="btn default-alert-btn">Default Alert</button>

        <!-- Button to Trigger Custom Alert -->
        <button class="btn custom-alert-btn">Custom Alert</button>
    </div>

    <!-- Custom Alert Box -->
    <div class="custom-alert" id="customAlert">
        <h1>Warning</h1>
        <span class="alert-text">This is a custom alert with a close
             option and animated border!</span>
        <button class="close-btn">&times;</button>
    </div>

    <script src="script.js"></script>
</body>
</html>

CSS代码

/* Reset */
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #1a1a1a;
  font-family: Arial, sans-serif;
  color: #fff;
}
/* Button Styling */
.button-container {
  display: flex;
  gap: 20px;
}
.btn {
  padding: 10px 20px;
  font-size: 16px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: transform 0.2s;
}

.default-alert-btn {
  background-color: #4285f4;
  color: white;
}

.custom-alert-btn {
  background-color: #ff5722;
  color: white;
}

.btn:hover {
  transform: scale(1.05);
}

.custom-alert {
  position: fixed;
  top: 50px;
  /* left: 50%; */
  width: 400px;
  padding: 5px;

  background-color: #333;
  color: #fff;
  border-radius: 10px;
  display: none;
  opacity: 0;
  transform: translateX(-50%);
  animation: fadeIn 0.5s forwards;
  /* Animated border effect */
  border: 1px solid transparent;
  border-radius: 10px;
  background-image: linear-gradient(#333, #333),
    linear-gradient(45deg, #ff5722, #4285f4, #0f9d58, #f4b400);
  background-origin: border-box;
  background-clip: content-box, border-box;
  box-shadow: 0px 0px 2px rgba(255, 255, 255, 0.1);
}

/* Multicolored border animation */
@keyframes borderAnimation {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}

.custom-alert {
  animation: fadeIn 0.5s forwards, borderAnimation 3s linear infinite;
  background-size: 200% 200%;
}

/* Fade-in animation */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.alert-text {
  display: inline;
}

.close-btn {
  position: absolute;
  top: 4px;
  right: 4px;
  background: none;
  border: none;
  color: #fff;
  font-size: 30px;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s;
}

.close-btn:hover {
  color: #ff5722;
}

JavaScript 代码

// Buttons
const defaultAlertBtn = document.querySelector('.default-alert-btn');
const customAlertBtn = document.querySelector('.custom-alert-btn');
const customAlert = document.getElementById('customAlert');
const closeBtn = document.querySelector('.close-btn');

// Show Default Alert
defaultAlertBtn.addEventListener('click', () => {
    alert("This is the default alert.");
});

// Show Custom Alert
customAlertBtn.addEventListener('click', () => {
    customAlert.style.display = 'block';
    setTimeout(() => {
        customAlert.style.opacity = '1';
    }, 10); // Delay for CSS fade-in effect
});

// Close Custom Alert
closeBtn.addEventListener('click', () => {
    customAlert.style.opacity = '0';
    setTimeout(() => {
        customAlert.style.display = 'none';
    }, 500); // Delay for CSS fade-out effect
});

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