Jquery 灰显背景，只显示弹出窗口

我想有一个弹出窗口，所有的背景是灰色的，但我不知道怎么做

我在codepen（）上找到了它（打开弹出窗口时背景变灰）。是什么让它这样做的？我如何复制它

我相信它在css中的某个地方：

/* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
*/

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section, main {
    display: block;
}
body {
    line-height: 1;
}
ol, ul {
    list-style: none;
}
blockquote, q {
    quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
    content: '';
    content: none;
}
table {
    border-collapse: collapse;
    border-spacing: 0;
}
/* -------------------------------- 

Primary style

-------------------------------- */
html * {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

*, *:after, *:before {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

body {
  font-size: 100%;
  font-family: "Lato", sans-serif;
  color: #8f9cb5;
  background-color: #ffd88f;
}

a {
  color: #35a785;
  text-decoration: none;
}

/* -------------------------------- 

Modules - reusable parts of our design

-------------------------------- */
.img-replace {
  /* replace text with an image */
  display: inline-block;
  overflow: hidden;
  text-indent: 100%;
  color: transparent;
  white-space: nowrap;
}

/* -------------------------------- 

xnugget info 

-------------------------------- */
.cd-nugget-info {
  text-align: center;
  position: absolute;
  width: 100%;
  height: 50px;
  line-height: 50px;
  bottom: 0;
  left: 0;
}
.cd-nugget-info a {
  position: relative;
  font-size: 14px;
  color: #5e6e8d;
  -webkit-transition: all 0.2s;
  -moz-transition: all 0.2s;
  transition: all 0.2s;
}
.no-touch .cd-nugget-info a:hover {
  opacity: .8;
}
.cd-nugget-info span {
  vertical-align: middle;
  display: inline-block;
}
.cd-nugget-info span svg {
  display: block;
}
.cd-nugget-info .cd-nugget-info-arrow {
  fill: #5e6e8d;
}

/* -------------------------------- 

Main components 

-------------------------------- */
header {
  height: 200px;
  line-height: 200px;
  text-align: center;
  background-color: #5e6e8d;
  color: #FFF;
}
header h1 {
  font-size: 20px;
  font-size: 1.25rem;
}

.cd-popup-trigger {
  display: block;
  width: 170px;
  height: 50px;
  line-height: 50px;
  margin: 3em auto;
  text-align: center;
  color: #FFF;
  font-size: 14px;
  font-size: 0.875rem;
  font-weight: bold;
  text-transform: uppercase;
  border-radius: 50em;
  background: #35a785;
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.07);
}
@media only screen and (min-width: 1170px) {
  .cd-popup-trigger {
    margin: 6em auto;
  }
}

/* -------------------------------- 

xpopup 

-------------------------------- */
.cd-popup {
  position: fixed;
  left: 0;
  top: 0;
  height: 100%;
  width: 100%;
  background-color: rgba(94, 110, 141, 0.9);
  opacity: 0;
  visibility: hidden;
  -webkit-transition: opacity 0.3s 0s, visibility 0s 0.3s;
  -moz-transition: opacity 0.3s 0s, visibility 0s 0.3s;
  transition: opacity 0.3s 0s, visibility 0s 0.3s;
}
.cd-popup.is-visible {
  opacity: 1;
  visibility: visible;
  -webkit-transition: opacity 0.3s 0s, visibility 0s 0s;
  -moz-transition: opacity 0.3s 0s, visibility 0s 0s;
  transition: opacity 0.3s 0s, visibility 0s 0s;
}

.cd-popup-container {
  position: relative;
  width: 90%;
  max-width: 400px;
  margin: 4em auto;
  background: #FFF;
  border-radius: .25em .25em .4em .4em;
  text-align: center;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
  -webkit-transform: translateY(-40px);
  -moz-transform: translateY(-40px);
  -ms-transform: translateY(-40px);
  -o-transform: translateY(-40px);
  transform: translateY(-40px);
  /* Force Hardware Acceleration in WebKit */
  -webkit-backface-visibility: hidden;
  -webkit-transition-property: -webkit-transform;
  -moz-transition-property: -moz-transform;
  transition-property: transform;
  -webkit-transition-duration: 0.3s;
  -moz-transition-duration: 0.3s;
  transition-duration: 0.3s;
}
.cd-popup-container p {
  padding: 3em 1em;
}
.cd-popup-container .cd-buttons:after {
  content: "";
  display: table;
  clear: both;
}
.cd-popup-container .cd-buttons li {
  float: left;
  width: 50%;
  list-style: none;
}
.cd-popup-container .cd-buttons a {
  display: block;
  height: 60px;
  line-height: 60px;
  text-transform: uppercase;
  color: #FFF;
  -webkit-transition: background-color 0.2s;
  -moz-transition: background-color 0.2s;
  transition: background-color 0.2s;
}
.cd-popup-container .cd-buttons li:first-child a {
  background: #fc7169;
  border-radius: 0 0 0 .25em;
}
.no-touch .cd-popup-container .cd-buttons li:first-child a:hover {
  background-color: #fc8982;
}
.cd-popup-container .cd-buttons li:last-child a {
  background: #b6bece;
  border-radius: 0 0 .25em 0;
}
.no-touch .cd-popup-container .cd-buttons li:last-child a:hover {
  background-color: #c5ccd8;
}
.cd-popup-container .cd-popup-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 30px;
  height: 30px;
}
.cd-popup-container .cd-popup-close::before, .cd-popup-container .cd-popup-close::after {
  content: '';
  position: absolute;
  top: 12px;
  width: 14px;
  height: 3px;
  background-color: #8f9cb5;
}
.cd-popup-container .cd-popup-close::before {
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
  left: 8px;
}
.cd-popup-container .cd-popup-close::after {
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
  right: 8px;
}
.is-visible .cd-popup-container {
  -webkit-transform: translateY(0);
  -moz-transform: translateY(0);
  -ms-transform: translateY(0);
  -o-transform: translateY(0);
  transform: translateY(0);
}
@media only screen and (min-width: 1170px) {
  .cd-popup-container {
    margin: 8em auto;
  }
}

或者在JS中：

jQuery(document).ready(function($){
    //open popup
    $('.cd-popup-trigger').on('click', function(event){
        event.preventDefault();
        $('.cd-popup').addClass('is-visible');
    });

    //close popup
    $('.cd-popup').on('click', function(event){
        if( $(event.target).is('.cd-popup-close') || $(event.target).is('.cd-popup') ) {
            event.preventDefault();
            $(this).removeClass('is-visible');
        }
    });
    //close popup when clicking the esc keyboard button
    $(document).keyup(function(event){
        if(event.which=='27'){
            $('.cd-popup').removeClass('is-visible');
        }
    });
});

多谢各位

如果我不够清楚，请告诉我。

<style>
.overlay {
     -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=50)";       /*   IE 8 */
     filter: alpha(opacity=50);  /* IE 5-7 */
     -moz-opacity: 0.5;          /* Netscape */
     -khtml-opacity: 0.5;        /* Safari 1.x */
     opacity: 0.5; 
     position:absolute;
     top:0;
     left:0;
     height:100%;
     width:100%
     background-color:grey;
     z-index:9998
}
</style>

<script>
$(document).append("<div class='overlay'></div>")
</script>

.覆盖{
-ms过滤器：“progid:DXImageTransform.Microsoft.Alpha（不透明度=50）”；/*IE 8*/
过滤器：alpha（不透明度=50）；/*IE 5-7*/
-moz不透明度：0.5；/*Netscape*/
-khtml不透明度：0.5；/*Safari 1.x*/
不透明度：0.5；
位置：绝对位置；
排名：0；
左：0；
身高：100%；
宽度：100%
背景颜色：灰色；
z指数：9998
}
$（文档）。附加（“”）

---

请确保弹出窗口的z索引为9999，同时也包括HTML，因为我看不出您是否有额外的“div”用于此覆盖

如果没有“背景”div，则必须添加一个：

<div class="popup-background"></div>

到CSS：

.popup-background {
     position: fixed;
     top: 0px;
     left: 0px;
     width: 100%;
     height: 100%;
     background-color: #fff; //whatever you want
     opacity: 0;
     transition: all 0.5 linear;
     -webkit-transition: same!
     -moz-transition: same!
     -o-transition: same!
}
.popup-background.visible {
     opacity: 1;
}
//This should be your pop-up container, this needs to have higher z-index in order to be obove background
.cd-popup {
   z-index: 9999;
}

---

未经测试和匆忙制作-可能包含错误。让我知道它是如何运行的。

使用fancybox.js和fancybox.css，非常简单，可以消除上面代码中的复杂性

这里演示/摆弄

就这么简单

$(".fancybox").fancybox({
helpers : {
    overlay : {
        css : {
            'background' : 'rgba(58, 42, 45, 0.95)'
        }
     }
   }
});

---

寻求代码帮助的问题必须包含在问题本身中重现代码所需的最短代码。虽然您提供了一个示例的链接，但如果该链接无效，您的问题对其他具有相同问题的未来SO用户将毫无价值。您使用的是什么弹出窗口？请在您自己的弹出窗口中显示代码，并至少包含一个尝试实现灰色背景的解决方案。

$(".fancybox").fancybox({
helpers : {
    overlay : {
        css : {
            'background' : 'rgba(58, 42, 45, 0.95)'
        }
     }
   }
});