这篇文章主要介绍js如何实现数字递增特效,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!
示例如下:
上面就是这个插件的效果,我们来看一下怎么使用的吧
第一: HTML部分这里简单列举一个
<div class="counter col_fourth">
<h3 class="timer count-title" id="count-number" data-to="300" data-speed="1500"></h3>
<p class="count-text ">小月博客</p>
</div>
上面我们来了解两个关键的东西:
ps: 这里的class和id 根据大家各自的修改去调整就好了,
第二:JS部分也是插件的核心代码
$.fn.countTo = function(a) {
a = a || {};
return $(this).each(function() {
var c = $.extend({},
$.fn.countTo.defaults, {
from: $(this).data("from"),
to: $(this).data("to"),
speed: $(this).data("speed"),
refreshInterval: $(this).data("refresh-interval"),
decimals: $(this).data("decimals")
}, a);
var h = Math.ceil(c.speed / c.refreshInterval),
i = (c.to - c.from) / h;
var j = this,
f = $(this),
e = 0,
g = c.from,
d = f.data("countTo") || {};
f.data("countTo", d);
if (d.interval) {
clearInterval(d.interval)
}
d.interval = setInterval(k, c.refreshInterval);
b(g);
function k() {
g += i;
e++;
b(g);
if (typeof(c.onUpdate) == "function") {
c.onUpdate.call(j, g)
}
if (e >= h) {
f.removeData("countTo");
clearInterval(d.interval);
g = c.to;
if (typeof(c.onComplete) == "function") {
c.onComplete.call(j, g)
}
}
}
function b(m) {
var l = c.formatter.call(j, m, c);
f.html(l)
}
})
};
$.fn.countTo.defaults = {
from: 0,
to: 0,
speed: 1000,
refreshInterval: 100,
decimals: 0,
formatter: formatter,
onUpdate: null,
onComplete: null
};
function formatter(b, a) {
return b.toFixed(2)
}
$("#count-number").data("countToOptions", {
formatter: function(b, a) {
return b.toFixed(2).replace(/\B(?=(?:\d{3})+(?!\d))/g, ",")
}
});
$(".timer").each(count);
function count(a) {
var b = $(this);
a = $.extend({},
a || {},
b.data("countToOptions") || {});
b.countTo(a)
};
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