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Darkening A Page With CSS

DZone's Guide to

Darkening A Page With CSS

· ·
Free Resource
// description of your code here


Add this to your css file or inside your “head� tags:

.darkenBackground {
background-color: rgb(0, 0, 0);
opacity: 0.7; /* Safari, Opera */
-moz-opacity:0.70: /* FireFox */
filter: alpha(opacity=70); /* IE */
z-index: 20;
height: 100%;
width: 100%;
background-repeat:repeat;
position:fixed;
top: 0px;
left: 0px;
}


Basically, this says set a style in CSS to have a black background, 70% transparent, filling the entire screen.

We then add this code anywhere inside our “body� tag:


 
This places our black box on the screen, and then the javascript hides it. We can then show it later on by putting this javascript in an event handler like onclick: document.getElementsById(�darkBackgroundLayer�).style.display = “�;
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\r\n\r\n\r\nThis places our black box on the screen, and then the javascript hides it. We can then show it later on by putting this javascript in an event handler like onclick:\r\n\r\ndocument.getElementsById(�darkBackgroundLayer�).style.display = “�;\r\n\r\n\r\n","wordCount":130,"deleted":false,"likeStatus":{"liked":false,"score":0,"canLike":false},"zonetop":"","articleTags":[],"header":{"id":831251,"title":"Darkening A Page With CSS","imageUrl":"/themes/dz20/images/ArticleImg_3.jpg","link":"/articles/darkening-page-css","imageLink":"/themes/dz20/images/ArticleImg_2.jpg","titleEll":"Darkening A Page With CSS","type":"article"},"url":"/articles/darkening-page-css","isLocked":false,"draft":false,"articleContent":"","source":null,"modDate":1165021980000,"views":490,"isLimited":false,"tldr":null,"originalSource":"","articleType":"snippet"}]; WMODEL_DATA.perms = {"canDecidePick":false,"canPublish":false}; WMODEL_DATA.authenticated = false; WMODEL_DATA.daysOldBody = "Technology moves quickly and this #type was published #time. Some or all of its contents may be outdated."; WMODEL_DATA.firstArticleContent = null; WMODEL_DATA.isPreview = false; WMODEL_DATA.OPTIONS = {}; TH.installWidgetController('article.content', 'articleContent5', WMODEL_DATA, typeof controller == 'function' ? controller : null, [{name: 'partners', data: true},{name: 'DEFAULT', data: true}], ' oUhbblYOaqbcblYOaqbcC', null); })(); (function() { function controller($scope, $service, $location, SideBarService, $timeout) { if ($scope.edition) { $scope.date = moment($scope.editionDate).utc().format('MMM DD, YYYY'); } SideBarService.ctx.pageSize = $scope.pageSize; SideBarService.ctx.isPreview = $scope.isPreview; SideBarService.ctx.mode = $scope.mode; SideBarService.fn.loader = $service; var $window = $(window); function checkWidth() { var windowsize = $window.width(); $scope.width = windowsize; } // Execute on load checkWidth() // Bind event listener $(window).resize(checkWidth); if ($scope.edition) { SideBarService.ctx.edition = $scope.edition; } SideBarService.fn.scrollCheck = function() { $scope.$emit('thIfScrollCheck'); }; var currentFilter; $scope.$on('$locationChangeSuccess', function() { if (!$location.search().filter) { $scope.filter = 'latest'; } else { $scope.filter = $location.search().filter; if ($scope.filter == 'latest') { $location.search('filter', null); } } if (currentFilter == $scope.filter) { return; } currentFilter = $scope.filter; SideBarService.ctx.filter = $scope.filter; }); $scope.display = SideBarService.getList(); $scope.$watchCollection(function() { return SideBarService.getList(); }, function (n) { $scope.display = n; }); $scope.isActive = SideBarService.isActive; $scope.isExcluded = SideBarService.isExcluded; $scope.loadMore = SideBarService.load; $scope.loading = function() { return SideBarService.ctx.loading; }; TH.on('TapBarStatusChange', function(expanded) { if (expanded) { SideBarService.unblock(); } }) } var WMODEL_DATA = {}; WMODEL_DATA.edition = null; WMODEL_DATA.editionName = ""; WMODEL_DATA.pageSize = 20; WMODEL_DATA.isPreview = false; WMODEL_DATA.editionDate = null; WMODEL_DATA.OPTIONS = {}; WMODEL_DATA.mode = null; TH.installWidgetController('sidebar.content.list', 'sidebarContentList8', WMODEL_DATA, typeof controller == 'function' ? controller : null, [{name: 'DEFAULT', data: true}], ' oUhbkSMaaqbcdvVkcC', null); })(); (function() { function controller($scope) { var $window = $(window); function checkWidth() { var windowsize = $window.width(); var $element = $('div.sidebar.sidebarTapBar'); $scope.width = windowsize; if(windowsize <= 1024 && $scope.edition){ $('.fixContentRight').removeClass('fixContentRight'); // $element.removeClass('expanded'); // $element.addClass('tapNotExpanded'); $('.tap').show(); }else if($scope.edition){ $('.tap').hide(); $('.mainContentRow').addClass('fixContentRight'); $element.removeClass('tapNotExpanded'); $element.addClass('expanded'); } } // Execute on load checkWidth(); // Bind event listener $(window).resize(checkWidth); } var WMODEL_DATA = {}; WMODEL_DATA.edition = null; WMODEL_DATA.slot = null; WMODEL_DATA.OPTIONS = {}; TH.installWidgetController('sidebar.tapBar', 'sidebar', WMODEL_DATA, typeof controller == 'function' ? controller : null, null, ' oUhbkSMadabfWVcC oUhbkSMadabbWQbVkcC', null); })(); (function() { function controller($scope, shareThis, TH$Dialog, TH$Service, $location) { $scope.getEditUrl = function(id, type) { if (!type || type == 'article') { return '/content/' + id + '/edit.html'; } else { return '/dzone/staff/' + type + (type == 'refcard' ? 'z' : 's') + '/' + id + '/edit.html'; } }; $scope.share = function(socialNet, url, title){ shareThis.shareThis(socialNet, url, title); }; // $scope.mailShareLink = function(article) { // return 'mailto:?subject=' + encodeURIComponent(article.header.title) + '&body=Article: ' + encodeURIComponent('https://dzone.com/' + article.header.link); // }; $scope.canDelete = function(article) { return article.canDelete; }; $scope.canPublish = function(article) { return article.canPublish; }; $scope.canEdit = function(article) { return article.canEdit; }; $scope.toggleComments = function(article) { if(!article.isLocked) { TH$Service.action('articles.lockNode', {type: 'node', id: article.id}).then(function(result) { if(result){ article.isLocked = true; TH$Dialog.success('You have disabled all comments for this Article'); }else{ TH$Dialog.error('error','Your requested was denied') } }); }else { TH$Service.action('articles.unlockNode', {type: 'node', id: article.id}).then(function(result) { if(result){ article.isLocked = false; TH$Dialog.success('You have enabled all comments for this Article'); }else{ TH$Dialog.error('error','Your requested was denied') } }); } }; $scope.toggleLimitComments = function (article) { if (!article.isLimited) { TH$Service.action('articles.limitNode', {type: 'node', id: article.id}).then(function (result) { if (result) { article.isLimited = true; TH$Dialog.success('You have limited comments for this Article. Now all comments will go through moderation.'); } else { TH$Dialog.error('error', 'Your requested was denied') } }); } else { TH$Service.action('articles.unlimitNode', {type: 'node', id: article.id}).then(function (result) { if (result) { article.isLimited = false; TH$Dialog.success('You removed the limits for comments on this Article'); } else { TH$Dialog.error('error', 'Your requested was denied') } }); } }; $scope.shareTwitter = function($event, title, url){ $event.preventDefault(); $event.stopPropagation(); var twitter = 'https://twitter.com/intent/tweet'; var link = $location.protocol() + '://' + location.host + url; var ref = location.host; var params = '?text='+title+'&url='+link+'&ref=dzone.com&via=DZone'; var win = window.open(twitter+params, '_blank'); win.focus(); }; $scope.edit = function(link) { TH$Dialog.open({ loadWidget: 'links.postPreview', widgetArgs: { edit: link.id }, size: 'xbig' }).then(function (result) { $scope.link.title = result.title; $scope.link.linkDescription = result.content; $scope.link.thumb = result.thumb; $scope.link.tags = result.topics; }); }; $scope.deleteLink = function(article) { var title = article.title; var type = 'link'; if(article.header){ title = (article.header.type == 'article') ? article.header.title : article.title; type = (article.header.type == 'article') ? 'article' : 'link'; } TH$Dialog.confirm('Do you want to delete "' + title + '"?').then(function() { return TH$Service.action('delete', {type: type, id: article.id}); }).then(function() { article.deleted = true; }); }; } var WMODEL_DATA = {}; WMODEL_DATA.OPTIONS = {}; TH.installWidgetController('content.commentsSlider', 'contentCommentsSlider7', WMODEL_DATA, typeof controller == 'function' ? controller : null, null, ' oUhbaqbcaibvnWffWVcC', null); })(); (function() { var WMODEL_DATA = {}; WMODEL_DATA.name = "commentsSlider"; WMODEL_DATA.slot = null; WMODEL_DATA.OPTIONS = {"name":"commentsSlider"}; TH.installWidgetController('components.slider', 'componentsSlider6', WMODEL_DATA, typeof controller == 'function' ? controller : null, null, ' oUhballbvbdSaoUhM', null); })();