How to implement bootstrap carousel chart

The first step is to open Sublime Text3 installed on your computer, create a new demo folder to store files, create a new html file in it, and quickly create an html template through the Tab shortcut key. and name the title. As shown in the picture:

The second step is to introduce external JQuery and Bootstrap library files in the top head tag. After downloading the relevant library files, place them in the corresponding folders. We place the JS file at the bottom of the Body tag. Pay attention to introducing the jQuery library, because the Bootstrap framework is based on the jQuery library file. And it must be placed on top of the Bootstrap library file, otherwise it will not have any effect. As shown in the picture:

#The third step is to add a container for carousel images. For ease of viewing, add a "container" div to the outermost div, plus a sub-div with a class name of carousel, and define an ID named "slidershow" for this container to facilitate the subsequent data attribute to declare the trigger.

<div id="slidershow" class="carousel"></div>

The fourth step is to design the counter for the carousel image. Add a counter inside the container and a class called "carousel-indicators" to display the playback order of the pictures. Among them, data-target="#slidershow" is used to trigger the target of the declared event. The code is as follows:

<ol class="carousel-indicators">
    <li class="active" data-target="#slidershow" data-slide-to="0"></li>
    <li data-target="#slidershow" data-slide-to="1"></li>
    <li data-target="#slidershow" data-slide-to="2"></li>
    <li data-target="#slidershow" data-slide-to="3"></li>      
</ol>

The fifth step is to design the playback area of ​​the carousel image. This area is mainly used to display carousel images. Add a class named "carousel-inner" and place it in the carousel container, and add a container named "item" to place each carousel image. The code is as follows:

<div class="carousel-inner">
    <div class="item active">
    <img src="/static/imghw/default1.png"  data-src="images/1.jpg"  class="lazy"   alt=""   style="max-width:90%" />      
    </div>     
</div>

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bootstrap Getting Started Tutorial"

The sixth step, if necessary, on each picture To add the corresponding title and content, just add a div class named "carousel-caption" to the item. Similarly, then add several carousel pictures in sequence. Note that for the sake of beauty, you can set the width of the picture to 100%. The code is as follows:

<div class="item active">
    <img src="/static/imghw/default1.png"  data-src="images/1.jpg"  class="lazy"   alt=""   style="max-width:90%" />
    <!-- 添加对应的标题和内容 -->
    <div class="carousel-caption">
    <h4 id="标题一">标题一</h4>
    <p>hello,i am tom!</p>
    </div>
</div>

The seventh step is to design the front and rear icon controllers of the carousel image. The carousel images we usually see have a forward and backward playback controller. Add an a tag to the Carousel that controls forward and a control to the right, and add a class named "carousel-control", as well as left and right classes. Among them, left means playing forward and right means playing backward. The code is as follows:

<a href="#slidershow" data-slide="prev" class="left carousel-control" role="button">
<span class="glyphicon glyphicon-chevron-left">
</span>
</a> 
<a href="#slidershow" data-slide="next" class="right carousel-control" role="button">
<span class="glyphicon glyphicon-chevron-right">
</span>
</a>

Step 8, view it in the browser, and the basic effect will appear. In order to make the user experience more friendly, when designing the playback of carousel pictures, add an "active" class to the first picture, and the first picture will be displayed when the default page is loaded; add "slide" to the div with the ID "slidershow" Class, its function is to make the switching between pictures smooth.

In the ninth step, the complete code is completed. After we check that the code is correct, we right-click the file and view the effect in the browser. The effect is as shown in the figure (in fact, after each step of writing the code, you should check the effect, that is, debugging.). Using the bootstrap framework, a relatively complex carousel chart can be completed by simply adding class styles.

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