原生JS实现LOADING效果

纯文本loading效果，可以自己定义颜色和速度

代码如下：

/** Loading animation

 *  Created by 黑と白の印 on 15/03/11.

 */

 

function loading(element,lightColor,darkColor,speed,callback){

    if(!element&&(!element.innerText||!element.textContent))return

    element = typeof element==="string"?document.getElementById(element):element

    lightColor = lightColor||"#fff",darkColor = darkColor||"#000",speed = speed||300

 

    var arr_spanEles = new Array()

     

    !function(arr_elementText){

        element.innerText=element.textContent=""

        for(var i=0;i<arr_elementText.length;i++){

            var span = document.createElement("span")

            element.innerText?span.innerText = arr_elementText[i]:span.textContent = arr_elementText[i]

            element.appendChild(span)

            arr_spanEles.push(span)

        }

    }((element.innerText||element.textContent).split(""))

 

    var index = -1,length = arr_spanEles.length

    var loadingTimer = setInterval(function(){

        arr_spanEles[Math.max(index,0)].style.color = darkColor

        if(index == length-1){

            index = -1

            callback&&callback()

        }

        ++index

        arr_spanEles[index].style.color = lightColor

    },speed)

}

以上就是本文所述的全部内容了，希望对大家学习javascript能有所帮助。