loading

myLoading('加载中');
myLoading('加载完成', false);

/*使用myLoading需要载入loading.css*/
window.myLoading = function (msg, isShow) {
    isShow = isShow !== false;
    if (isShow) {
        if (document.getElementsByClassName('spinner-wrap').length !== 0) {
            return;
        }
        var wrap = document.createElement('div');
        wrap.setAttribute('class', 'spinner-wrap');
        var spinner = document.createElement('div');
        spinner.setAttribute('class', 'spinner');
        wrap.appendChild(spinner);
        for (var i = 1; i <= 3; i++) {
            var spinnerContainer = document.createElement('div');
            spinnerContainer.setAttribute('class', 'spinner-container container' + i);
            for (var j = 1; j <= 4; j++) {
                var circle = document.createElement('div');
                circle.setAttribute('class', 'circle' + j);
                spinnerContainer.appendChild(circle);
            }
            spinner.appendChild(spinnerContainer);
        }
        var p = document.createElement('p');
        p.innerHTML = msg;
        wrap.appendChild(p);
        document.body.appendChild(wrap);
    } else {
        if (document.getElementsByClassName('spinner-wrap').length !== 0) {
            // console.log('test');
            document.body.removeChild(document.getElementsByClassName('spinner-wrap')[0]);
        }
    }
};

.spinner-wrap {
    position: fixed;
     100px;
    height: 100px;
    left: 50%;
    top: 50%;
    border-radius: 5px;
    margin-left: -50px;
    margin-top: -50px;
    background: #000;
    opacity: 0.6;
}

.spinner-wrap p {
    color: white;
    text-align: center;
    margin: 0;
    line-height: 22px;
    margin-top: 70px;
}

.spinner {
     20px;
    height: 20px;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -10px;
    margin-top: -10px;
}

.container1>div,
.container2>div,
.container3>div {
     6px;
    height: 6px;
    background-color: #fff;

    border-radius: 100%;
    position: absolute;
    -webkit-animation: bouncedelay 1.2s infinite ease-in-out;
    animation: bouncedelay 1.2s infinite ease-in-out;
    -webkit-animation-fill-mode: both;
    animation-fill-mode: both;
}

.spinner .spinner-container {
    position: absolute;
     100%;
    height: 100%;
}

.container2 {
    -webkit-transform: rotateZ(45deg);
    transform: rotateZ(45deg);
}

.container3 {
    -webkit-transform: rotateZ(90deg);
    transform: rotateZ(90deg);
}

.circle1 {
    top: 0;
    left: 0;
}

.circle2 {
    top: 0;
    right: 0;
}

.circle3 {
    right: 0;
    bottom: 0;
}

.circle4 {
    left: 0;
    bottom: 0;
}

.container2 .circle1 {
    -webkit-animation-delay: -1.1s;
    animation-delay: -1.1s;
}

.container3 .circle1 {
    -webkit-animation-delay: -1.0s;
    animation-delay: -1.0s;
}

.container1 .circle2 {
    -webkit-animation-delay: -0.9s;
    animation-delay: -0.9s;
}

.container2 .circle2 {
    -webkit-animation-delay: -0.8s;
    animation-delay: -0.8s;
}

.container3 .circle2 {
    -webkit-animation-delay: -0.7s;
    animation-delay: -0.7s;
}

.container1 .circle3 {
    -webkit-animation-delay: -0.6s;
    animation-delay: -0.6s;
}

.container2 .circle3 {
    -webkit-animation-delay: -0.5s;
    animation-delay: -0.5s;
}

.container3 .circle3 {
    -webkit-animation-delay: -0.4s;
    animation-delay: -0.4s;
}

.container1 .circle4 {
    -webkit-animation-delay: -0.3s;
    animation-delay: -0.3s;
}

.container2 .circle4 {
    -webkit-animation-delay: -0.2s;
    animation-delay: -0.2s;
}

.container3 .circle4 {
    -webkit-animation-delay: -0.1s;
    animation-delay: -0.1s;
}

@-webkit-keyframes bouncedelay {
    0%,
    80%,
    100% {
        -webkit-transform: scale(0.0)
    }
    40% {
        -webkit-transform: scale(1.0)
    }
}

@keyframes bouncedelay {
    0%,
    80%,
    100% {
        transform: scale(0.0);
        -webkit-transform: scale(0.0);
    }
    40% {
        transform: scale(1.0);
        -webkit-transform: scale(1.0);
    }
}