一、先引入jquery文件

大部分主题都引入第三方的jq文件，没有的话，在主题的header.php引入一下。

<script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>

二、定义css文件

放入主题的style.css文件里

.aside-count .content {
    padding: 15px
}
 
.aside-count .content .item {
    margin-bottom: 15px
}
 
.aside-count .content .item:last-child {
    margin-bottom: 0
}
 
.aside-count .content .item .title {
    font-size: 12px;
    color: var(--minor);
    margin-bottom: 5px;
    display: flex;
    align-items: center
}
 
.aside-count .content .item .title span {
    color: var(--theme);
    font-weight: 500;
    font-size: 14px;
    margin: 0 5px
}
 
.aside-count .content .item .progress {
    display: flex;
    align-items: center
}
 
.aside-count .content .item .progress .progress-bar {
    height: 10px;
    border-radius: 5px;
    overflow: hidden;
    background: var(--classC);
    width: 0;
    min-width: 0;
    flex: 1;
    margin-right: 5px
}
@keyframes progress {
    0% {
        background-position: 0 0
    }
 
    100% {
        background-position: 30px 0
    }
}
.aside-count .content .item .progress .progress-bar .progress-inner {
    width: 0;
    height: 100%;
    border-radius: 5px;
    transition: width 0.35s;
    -webkit-animation: progress 750ms linear infinite;
    animation: progress 750ms linear infinite
}
 
.aside-count .content .item .progress .progress-bar .progress-inner-1 {
    background: #bde6ff;
    background-image: linear-gradient(135deg, #50bfff 25%, transparent 25%, transparent 50%, #50bfff 50%, #50bfff 75%, transparent 75%, transparent 100%);
    background-size: 30px 30px
}
 
.aside-count .content .item .progress .progress-bar .progress-inner-2 {
    background: #ffd980;
    background-image: linear-gradient(135deg, #f7ba2a 25%, transparent 25%, transparent 50%, #f7ba2a 50%, #f7ba2a 75%, transparent 75%, transparent 100%);
    background-size: 30px 30px
}
 
.aside-count .content .item .progress .progress-bar .progress-inner-3 {
    background: #ffa9a9;
    background-image: linear-gradient(135deg, #ff4949 25%, transparent 25%, transparent 50%, #ff4949 50%, #ff4949 75%, transparent 75%, transparent 100%);
    background-size: 30px 30px
}
 
.aside-count .content .item .progress .progress-bar .progress-inner-4 {
    background: #67c23a;
    background-image: linear-gradient(135deg, #4f9e28 25%, transparent 25%, transparent 50%, #4f9e28 50%, #4f9e28 75%, transparent 75%, transparent 100%);
    background-size: 30px 30px
}

三、定义js文件

放入主题js文件内

function init_life_time() {
            function getAsideLifeTime() {
                let nowDate = +new Date();
                let todayStartDate = new Date(new Date().toLocaleDateString()).getTime();
                let todayPassHours = (nowDate - todayStartDate) / 1000 / 60 / 60;
                let todayPassHoursPercent = (todayPassHours / 24) * 100;
                $('#dayProgress .title span').html(parseInt(todayPassHours));
                $('#dayProgress .progress .progress-inner').css('width', parseInt(todayPassHoursPercent) + '%');
                $('#dayProgress .progress .progress-percentage').html(parseInt(todayPassHoursPercent) + '%');
                let weeks = {
                    0: 7,
                    1: 1,
                    2: 2,
                    3: 3,
                    4: 4,
                    5: 5,
                    6: 6
                };
                let weekDay = weeks[new Date().getDay()];
                let weekDayPassPercent = (weekDay / 7) * 100;
                $('#weekProgress .title span').html(weekDay);
                $('#weekProgress .progress .progress-inner').css('width', parseInt(weekDayPassPercent) + '%');
                $('#weekProgress .progress .progress-percentage').html(parseInt(weekDayPassPercent) + '%');
                let year = new Date().getFullYear();
                let date = new Date().getDate();
                let month = new Date().getMonth() + 1;
                let monthAll = new Date(year, month, 0).getDate();
                let monthPassPercent = (date / monthAll) * 100;
                $('#monthProgress .title span').html(date);
                $('#monthProgress .progress .progress-inner').css('width', parseInt(monthPassPercent) + '%');
                $('#monthProgress .progress .progress-percentage').html(parseInt(monthPassPercent) + '%');
                let yearPass = (month / 12) * 100;
                $('#yearProgress .title span').html(month);
                $('#yearProgress .progress .progress-inner').css('width', parseInt(yearPass) + '%');
                $('#yearProgress .progress .progress-percentage').html(parseInt(yearPass) + '%');
            }
            getAsideLifeTime();
            setInterval(() => {
                getAsideLifeTime();
            }, 1000);
        }
        init_life_time()

四、html代码

最后一步，选择合适的位置添加代码，在侧栏显示，感觉位置看着最好。

<div class="aside aside-count">
        <div class="p-3"><span style="font-size: 1.2em; color: orange;"><i class="fas fa-hourglass-half"></i></span> 人生倒计时</div>
        <div class="content">
            <div class="item" id="dayProgress">
                <div class="title">今日已经过去<span></span>小时</div>
                <div class="progress">
                    <div class="progress-bar">
                        <div class="progress-inner progress-inner-1"></div>
                    </div>
                    <div class="progress-percentage"></div>
                </div>
            </div>
            <div class="item" id="weekProgress">
                <div class="title">这周已经过去<span></span>天</div>
                <div class="progress">
                    <div class="progress-bar">
                        <div class="progress-inner progress-inner-2"></div>
                    </div>
                    <div class="progress-percentage"></div>
                </div>
            </div>
            <div class="item" id="monthProgress">
                <div class="title">本月已经过去<span></span>天</div>
                <div class="progress">
                    <div class="progress-bar">
                        <div class="progress-inner progress-inner-3"></div>
                    </div>
                    <div class="progress-percentage"></div>
                </div>
            </div>
            <div class="item" id="yearProgress">
                <div class="title">今年已经过去<span></span>个月</div>
                <div class="progress">
                    <div class="progress-bar">
                        <div class="progress-inner progress-inner-4"></div>
                    </div>
                    <div class="progress-percentage"></div>
                </div>
            </div>
        </div>
    </div>