我得到了从0到特定数字的计数器。现在我需要激活计数器,当它在屏幕上可见时(距离屏幕顶部大约10%)。我不知道该怎么做。
<div id="counter">
<h2 id="counter1">0</h2>
<i class="seperator"></i>
<h3>{param_count-title}</h3>
</div>
<script type="text/javascript">
$({countNum: $('#counter1').text()}).animate({countNum: {param_count-number}}, {
duration: {param_duration},
easing:'linear',
step: function() {
$('#counter1').text(Math.floor(this.countNum));
},
complete: function() {
$('#counter1').text("{param_count-number}");
}
});
答案 0 :(得分:0)
演示: http://so.devilmaycode.it/how-to-trigger-counter-when-become-visible-on-the-screen
你需要一点点CSS:
#counter {
top: -20%;
left: 0;
position: absolute;
opacity: 0
}
那么Javascript部分就像:
$('#counter').animate({
top: '20%',
opacity: 1
}, 1000, function () {
// YOUR CODE HERE
var from = parseInt($('#counter h2').text()),
to = $('#counter h3').text().length;
$({
countNum: from
}).animate({
countNum: to
}, {
duration: 1000,
easing: 'linear',
step: function () {
$('#counter h2').text(Math.floor(this.countNum));
},
complete: function () {
$('#counter h2').text("{param_count-number}");
}
});
// EOF YOUR CODE
});