滚动间谍Uikit 3框架和计数

Question

我是前端的初学者，javascript对我来说很难：(我想在没有jquery的情况下使用组件scrollspy uikit 3进行计数https://getuikit.com/docs/scrollspy我做了这样的，但它不起作用

<span id="number"></span>
<script>
UIkit.scrollspy('#number', 'inview', function () {
const countUp = new CountUp('number', 0, 1000 );
countUp.start();
});
</script>

Answer 1

我为此创建了一个脚本。

var util = UIkit.util;
var el = util.$('#heading');
var textIndex = 0;
UIkit.scrollspy(el, {repeat: true, delay: 100});

util.on(el,'inview', function (){
function counter( start, end, duration) {
let current = start,
range = end - start,
increment = end > start ? 1 : -1,
step = Math.abs(Math.floor(duration / range)),
timer = setInterval(() => {
current += increment;
el.textContent = current;
if (current == end) {
clearInterval(timer);
}
}, step);
}
counter(0, 100, 3000);
});
util.on(el, 'outview', function(){
el.textContent = 0;
});

<!-- UIkit CSS -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/uikit@3.6.22/dist/css/uikit.min.css" />
<!-- UIkit JS -->
<script src="https://cdn.jsdelivr.net/npm/uikit@3.6.22/dist/js/uikit.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/uikit@3.6.22/dist/js/uikit-icons.min.js"></script>
<section class="uk-section uk-section-primary" uk-height-viewport="offset-top: true">
<div class="uk-container">
<div class="uk-text-center">
<h1 >SECTION 1</h1>
<a href="https://codepen.io/bilashism/pen/mZpZLx" target="_blank">Source Code for Number Increment</a>
</div>
<div class="uk-text-center uk-margin-medium-top">
<a class="uk-link-reset" href="#section" uk-scroll>Scroll</a>
</div>
</div>
</section>
<section class="uk-section uk-section-secondary" id="section">
<div class="uk-container">
<h1 class="uk-text-center" id="heading">0</h1>
</div>
</section>

您需要监听inview和outview事件。方法如下：

UIkit.util.on(element, 'event', function(){
//your code will be here here
});