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这是一款通过jquery和css3制作的图片遮罩和过渡动画效果。该效果通过图片制作和CSS transforms动画来制作页面过渡动画效果,非常炫酷。
在页面中引入style.css样式文件和jquery、main.js文件。
<link href="path/to/css/style.css" rel="stylesheet"> <script type="text/javascript" src="path/to/js/jquery.min.js"></script> <script type="text/javascript" src="path/to/js/main.js"></script>
HTML结构
该图片遮罩和过渡动画效果的HTML结构如下:每一个<section>是一篇文章,文章的具体内容不写在HTML代码中,而是通过js代码来调用。
<main class="cd-image-mask-effect"> <section class="project-1 cd-project-mask"> <h1>Project Name</h1> <div class="featured-image"></div> <div class="mask"> <img src="img/mask-01.png" alt="mask"> <span class="mask-border mask-border-top"></span> <span class="mask-border mask-border-bottom"></span> <span class="mask-border mask-border-left"></span> <span class="mask-border mask-border-right"></span> </div> <a href="#0" class="project-trigger">Explore Project</a> <a href="#0" class="cd-scroll cd-img-replace">Scroll down</a> <div class="cd-project-info" data-url="project-1"> <!-- content loaded using js --> </div> <a href="#0" class="project-close cd-img-replace">Close Project</a> </section> <!-- .cd-project-mask --> <section class="project-2 cd-project-mask"> <!-- content here --> </section> </main>
JavaScript
为了实现图片遮罩效果,代码中创建了一个ProjectMask对象,并使用initProject方法来对它进行初始化。
function ProjectMask( element ) { this.element = element; this.projectTrigger = this.element.find('.project-trigger'); this.projectClose = this.element.find('.project-close'); this.projectTitle = this.element.find('h1'); this.projectMask = this.element.find('.mask'); //... this.initProject(); } var revealingProjects = $('.cd-project-mask'); var objProjectMasks = []; if( revealingProjects.length > 0 ) { revealingProjects.each(function(){ //create ProjectMask objects objProjectMasks.push(new ProjectMask($(this))); }); } 当用户选择了某个项目之后,revealProject方法用于放大被遮罩的图片,uploadContent方法用于加载文章的内容。 ProjectMask.prototype.initProject = function() { var self = this; //open the project this.projectTrigger.on('click', function(event){ event.preventDefault(); if( !self.animating ) { self.animating = true; //upload project content self.uploadContent(); //show project content and scale up mask self.revealProject(); } }); //... }; ProjectMask.prototype.revealProject = function() { var self = this; //get mask scale value self.updateMaskScale(); //scale up mask and animate project title self.projectTitle.attr('style', 'opacity: 0;'); self.projectMask.css('transform', 'translateX(-50%) translateY(-50%) scale('+self.maskScaleValue+')').one(transitionEnd, function(){ self.element.addClass('center-title'); self.projectTitle.attr('style', ''); self.animating = false; }); //hide the other sections self.element.addClass('project-selected content-visible').parent('.cd-image-mask-effect').addClass('project-view'); } ProjectMask.prototype.uploadContent = function(){ var self = this; //if content has not been loaded -> load it if( self.projectContent.find('.content-wrapper').length == 0 ) self.projectContent.load(self.projectContentUrl+'.html .cd-project-info > *'); if( self.projectContentUrl+'.html'!=window.location ){ //add the new page to the window.history window.history.pushState({path: self.projectContentUrl+'.html'},'',self.projectContentUrl+'.html'); } }