javascript - 为什么这个 turnjs 的实现不起作用？

Question

我正在尝试在本地实现此示例：

首先是导入：

jquery 库和 turnjs。

转JS

HTML：

<div class="flipbook-viewport">
   <div class="container">
<div class="flipbook">
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/01.jpg)"></div>
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/02.jpg)"></div>
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/03.jpg)"></div>
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/04.jpg)"></div>
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/05.jpg)"></div>
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/06.jpg)"></div>
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/07.jpg)"></div>
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/08.jpg)"></div>
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/09.jpg)"></div>
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/10.jpg)"></div>
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/11.jpg)"></div>
  <div style="background-image:url(https://raw.github.com/blasten/turn.js/master/demos/magazine/pages/12.jpg)"></div>
</div>

JavaScript：似乎错误就在这里，但我对 JavaScript 的经验很少。我不明白为什么会这样。

window.addEventListener('resize', resize);
document.body.addEventListener('touchmove', function(e) {
e.preventDefault();
  // e.stopPropagation();
});

function loadApp() {
  console.log('Load App');
  var size = getSize();
  console.log(size);
  // Create the flipbook
  $('.flipbook').turn({
  // Width
  width: size.width,
  // Height
  height: size.height,

  // Elevation
  elevation: 50,

  // Enable gradients
  gradients: true,

  // Auto center this flipbook
  autoCenter: true

  });
}

function getSize() {
  console.log('get size');
  var width = document.body.clientWidth;
  var height = document.body.clientHeight;

  return {
    width: width,
    height: height
  }
}

function resize() {
  console.log('resize event triggered');

  var size = getSize();
  console.log(size);

  if (size.width > size.height) { // landscape
    $('.flipbook').turn('display', 'double');
  }
  else {
    $('.flipbook').turn('display', 'single');
  }

  $('.flipbook').turn('size', size.width, size.height);
}

// Load App
loadApp();

CSS：

html,
body {
  height: 100%;
  width: 100%;
  min-height: 100%;
  min-width: 100%;
}

body {
  overflow: hidden;
  background-color: #fcfcfc;
  margin: 0;
  padding: 0;
}

.flipbook-viewport {
  overflow: hidden;
  width: 100%;
  height: 100%;
}

.flipbook-viewport .container {
  position: absolute;
  top: 0;
  left: 0;
  margin: auto;
}

.flipbook-viewport .flipbook {
  width: 922px;
  height: 600px;
}

.flipbook-viewport .page {
  width: 461px;
  height: 600px;
  background-color: white;
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.flipbook .page {
  -webkit-box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
  -moz-box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
  -ms-box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
  -o-box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
 }

.flipbook-viewport .page img {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  margin: 0;
}

.flipbook-viewport .shadow {
  -webkit-transition: -webkit-box-shadow 0.5s;
  -moz-transition: -moz-box-shadow 0.5s;
  -o-transition: -webkit-box-shadow 0.5s;
  -ms-transition: -ms-box-shadow 0.5s;
  -webkit-box-shadow: 0 0 20px #ccc;
  -moz-box-shadow: 0 0 20px #ccc;
  -o-box-shadow: 0 0 20px #ccc;
  -ms-box-shadow: 0 0 20px #ccc;
  box-shadow: 0 0 20px #ccc;
}

但不工作。

这是控制台日志：

我应该怎么办？

谢谢！

Answer 1

问题是（正如您在控制台错误中看到的）document.body 为空。那是因为 Dom（html 结构）没有完全加载，AKA 准备好了。

将您的代码包装在 jQuery 就绪处理程序中。 jQuery(document).ready(function() {......});

---

请注意，这比评论中建议的“窗口加载”要好，因为这不会等待每个图像都完全加载执行。