如何在页面加载/使用Javascript时自动打开仅限CSS的弹出窗口？

Question

我创建了仅限CSS的弹出窗口,只能通过单击链接/按钮来工作.我想在页面加载时自动显示此弹出窗口.此外,如何打开此弹出窗口,而无需单击链接/按钮即使用Javascript/jQuery.

小提琴

.modalDialog {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 99999;
  opacity: 0;
  -webkit-transition: opacity 400ms ease-in;
  -moz-transition: opacity 400ms ease-in;
  transition: opacity 400ms ease-in;
  pointer-events: none;
}
.modalDialog:target {
  opacity: 1;
  pointer-events: auto;
}
.modalDialog > div {
  width: 400px;
  position: relative;
  margin: 10% auto;
  padding: 5px 20px 13px 20px;
  border-radius: 10px;
  background: #fff;
  background: #339999;
}
.close {
  background: #606061;
  color: #FFFFFF;
  line-height: 25px;
  position: absolute;
  right: -12px;
  text-align: center;
  top: -10px;
  width: 24px;
  text-decoration: none;
  font-weight: bold;
  -webkit-border-radius: 12px;
  -moz-border-radius: 12px;
  border-radius: 12px;
  -moz-box-shadow: 1px 1px 3px #000;
  -webkit-box-shadow: 1px 1px 3px #000;
  box-shadow: 1px 1px 3px #000;
}
.close:hover {
  background: #00d9ff;
}

<a href="#openModal">Open Modal</a>

<div id="openModal" class="modalDialog">
  <div>
    <a href="#close" title="Close" class="close">X</a>

    <p style="color:white">This is a sample modal box that can be created using the powers of CSS3.</p>

  </div>
</div>

提前致谢

Answer 1

不需要 jQuery，您可以使用 Vanilla Javascript 来完成此操作。要在页面加载时自动打开弹出窗口，请将哈希值设置为id弹出窗口的。

演示

function openPopup() {
  window.location.hash = 'openModal';
}

window.onload = openPopup;

.modalDialog {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 99999;
  opacity: 0;
  -webkit-transition: opacity 400ms ease-in;
  -moz-transition: opacity 400ms ease-in;
  transition: opacity 400ms ease-in;
  pointer-events: none;
}
.modalDialog:target {
  opacity: 1;
  pointer-events: auto;
}
.modalDialog > div {
  width: 400px;
  position: relative;
  margin: 10% auto;
  padding: 5px 20px 13px 20px;
  border-radius: 10px;
  background: #fff;
  background: #339999;
}
.close {
  background: #606061;
  color: #FFFFFF;
  line-height: 25px;
  position: absolute;
  right: -12px;
  text-align: center;
  top: -10px;
  width: 24px;
  text-decoration: none;
  font-weight: bold;
  -webkit-border-radius: 12px;
  -moz-border-radius: 12px;
  border-radius: 12px;
  -moz-box-shadow: 1px 1px 3px #000;
  -webkit-box-shadow: 1px 1px 3px #000;
  box-shadow: 1px 1px 3px #000;
}
.close:hover {
  background: #00d9ff;
}

<a href="#openModal">Open Modal</a>

<div id="openModal" class="modalDialog">
  <div>
    <a href="#close" title="Close" class="close">X</a>

    <p style="color:white">This is a sample modal box that can be created using the powers of CSS3.</p>

  </div>
</div>

<br />
<br />
<button onclick="openPopup()">Open popup by Javascript</button>

您还可以创建一个通用函数来打开弹出窗口：

function openPopup(popupId) {
    window.location.hash = popupId;
}

Answer 2

由于您只是使用 css 不透明度隐藏弹出窗口，因此您可以在页面加载时使用 jquery 来显示弹出窗口，或者如果您想添加一些动画，则可以将其淡入淡出。

另外，在 css 中将弹出窗口的显示设置为 none 可能是个好主意，否则您可能会在以后遇到问题。你可以这样做：

.modalDialog {
  //added display none on element
  display:none;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 99999;
  //opacity: 0;
  -webkit-transition: opacity 400ms ease-in;
  -moz-transition: opacity 400ms ease-in;
  transition: opacity 400ms ease-in;
  pointer-events: none;
}

$(document).ready(function() {
  //Use jQuery to show the popup
  $('.modalDialog').show();
  //Alternativly use jQuery to fadeIn the popup
  $('.modalDialog').fadeIn()
})

最终更新代码： https: //jsfiddle.net/q4n7p0jx/1/