引导程序4传送带不工作

Question

使用传送带滑块构建页面。

Bootsrap 4轮播不工作：

<div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel"> 
    <ol class="carousel-indicators"> 
    <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li> 
    <li data-target="#carouselExampleIndicators" data-slide-to="1"></li> 
    <li data-target="#carouselExampleIndicators" data-slide-to="2"></li> 
    </ol> 
    <div class="carousel-inner" role="listbox"> 
    <div class="carousel-item active"> 
     <img class="d-block img-fluid" src="/wp-content/themes/tarps/assets/img/aaatarps-banner.png" alt="First slide"> 
    </div> 
    <div class="carousel-item"> 
     <img class="d-block img-fluid" src="/wp-content/themes/tarps/assets/img/aaatarps-banner.png" alt="Second slide"> 
    </div> 
    <div class="carousel-item"> 
     <img class="d-block img-fluid" src="..." alt="Third slide"> 
    </div> 
    </div> 
    <a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-slide="prev"> 
    <span class="carousel-control-prev-icon" aria-hidden="true"></span> 
    <span class="sr-only">Previous</span> 
    </a> 
    <a class="carousel-control-next" href="#carouselExampleIndicators" role="button" data-slide="next"> 
    <span class="carousel-control-next-icon" aria-hidden="true"></span> 
    <span class="sr-only">Next</span> 
    </a> 
</div> 

<script> 
$('.carousel').carousel({ 
    interval: 2000}) 
</script> 

当我打开Chrome开发者工具，在浏览器控制台显示错误如下：

Uncaught ReferenceError: $ is not defined 

不太知道我错过了什么？

Answer 1

问题被链接到js资源。