The login page has a background, which will greatly increase people's visual enjoyment. However, in addition to the static page, the login page also has a dynamic page login. This article mainly introduces the relevant information on HTML+CSS to realize the dynamic background login page. Friends in need can refer to it. Next, I hope it can help everyone.
1. Realize the dynamic transformation of the background image
First, add the image p in the body section of the HTML page. The code is as follows:
<body>
<p class="bgk">
<p class="bgk-image" style="background-image: url('${pageContext.request.contextPath}/img/1.jpg')"></p>
<p class="bgk-image" style="background-image: url('${pageContext.request.contextPath}/img/2.jpg')"></p>
<p class="bgk-image" style="background-image: url('${pageContext.request.contextPath}/img/3.jpg')"></p>
<p class="bgk-image" style="background-image: url('${pageContext.request.contextPath}/img/4.jpg')"></p>
</body>Then perform CSS design on the image. If you want to size and position the image, the following code must be written first:
`.bgk {
margin: auto;
position: absolute;
width: 1366px;
height: 672px;
overflow: hidden; /*溢出部分隐藏*/
}`After the position is set ok, then set the image inside. In order to make the image large enough to cover the page, the code must have background-size: cover;
To achieve dynamic effects, then your css code must have animation design:
-webkit-animation-name: kenburns; /*-animation-name:为@keyframes 动画规定名称,必须与-animation-duration同时使用，否则无动画效果*/ animation-name: kenburns; /*或者：后面值为需要绑定到选择器上的keyframe名称*/ -webkit-animation-duration: 16s; /*定义动画完成一个周期所需时间*/ animation-duration: 16s; -webkit-animation-timing-function: linear; /*规定动画从头到尾以相同速度播放，还有其他几个速度值*/ animation-timing-function: linear; -webkit-animation-iteration-count: infinite; /*规定动画播放次数，infinite为无限次*/ animation-iteration-count: infinite; -webkit-transform: scale(1.2); /*规定动画的缩放特效，scale：规定2D缩放*/ transform: scale(1.2); -webkit-filter: blur(10px); /*定义图片的模糊程度，显示为毛玻璃效果*/ filter: blur(10px);
In Bind each sub-element selector. If there are several pictures, bind several selectors:
.bgk-image:nth-child(1) {
-webkit-animation-name: kenburns-1; /*选择器上的名称*/
animation-name: kenburns-1;
z-index: 3; /*动画堆叠顺序，值越大表示越先播放，离用户越近*/
}
.bgk-image:nth-child(2) {
-webkit-animation-name: kenburns-2;
animation-name: kenburns-2;
z-index: 2;
}
.bgk-image:nth-child(3) {
-webkit-animation-name: kenburns-3;
animation-name: kenburns-3;
z-index: 1;
}
.bgk-image:nth-child(4) {
-webkit-animation-name: kenburns-4;
animation-name: kenburns-4;
z-index: 0;
}After creating the selector, you can preview your dynamic background image transformation
2. Design of the login form
Continue to add a form to the previous HTML page
<p class="form_login_p"> <form class="form_login" action="" method="post"> <label class="login_title">登录您的账户</label> <label class="username">用户名</label><input class="input_username" id="input_username" type="text" name="username" placeholder="邮箱/手机号"/> <label class="password">密 码</label><input class="input_password" id="input_password" type="password" name="password" placeholder="请输入密码"/> <input type="submit" value="登录"/><br/> </form> </p>
After adding the form, it is necessary to design the style of the form. First, you have to define a circle for the form and limit its width and height
.form_login{
margin: auto;
width:700px;
height: 480px;
top: 90px;
left: 333px;
position: absolute;
border-radius: 15px;
background: rgba(216,216,216,0.5); /*设置form表单透明度*/
text-align: center;
overflow: hidden;
}Then you need to position and style each label in the form. You can design it freely here.
For the design of the input box, I only post the main style code
outline:none; /*outline （轮廓）是绘制于元素周围的一条线，位于边框边缘的外围，可起到突出元素的作用。*/ border:1px solid rgba(0,0,0,.49); /*输入框边框的大小，实线，rgba（red,green,blue,a为透明度）,透明度处于0-1之间*/ -webkit-background-clip: padding-box; /*background-clip 规定背景的绘制区域,padding-box为内容被裁减到内边距框*/ background-clip: padding-box; background:rgba(216,216,216,0.4) ; border-radius:6px; /*对输入框进行圆角*/ padding:7px; /*输入框中光标位置*/
When focusing on the input box, you can add a little brilliant color
.form_login input[type="text"]:focus,input[type="password"]:focus{
-webkit-transition:border linear .2s,-webkit-box-shadow linear .5s; /*对边框颜色的逐步过渡高亮显示，后面是对阴影的逐步过渡*/
border-color:rgba(255,128,0,.75);
}Finally, the submit button Design
text-shadow:0px -1px 0px #5b6ddc; /*文字阴影设置*/ outline:none; border:1px solid rgba(0,0,0,0.49); /*按钮边框颜色与透明度设置*/ -webkit-background-clip: padding-box; /*规定内容的绘制区域，padding-box为内边框距*/ background-clip: padding-box; border-radius:6px; cursor:pointer; /*光标形状，pointer为一只手的形状*/ background-color:#768ee4; /*按钮背景颜色*/
When the mouse is placed on the submit button, you can appropriately design some animation effects
.form_login input[type="submit"]:hover{
background-color:#5f73e9;
background-image:-webkit-linear-gradient(bottom,#5f73e9 0%,#859bef 100%);
background-image:-moz-linear-gradient(bottom,#5f73e9 0%,#859bef 100%);
background-image:-ms-linear-gradient(bottom,#5f73e9 0%,#859bef 100%);
background-image:-o-linear-gradient(bottom,#5f73e9 0%,#859bef 100%);
-webkit-box-shadow: inset 0px 1px 0px #aab9f4; /*当鼠标放在按钮上个时边框的阴影*/
box-shadow: inset 0px 1px 0px #aab9f4;
margin-top:22px;
}Finally the entire design is completed and you can see your final effect
Related recommendations:
Based on CSS3 dynamic background login box code_html/css_WEB-ITnose
jQuery dynamic background image effect implementation method_jquery
A beautiful login page made with Html
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