取决于日期的自动网页黑白滤镜Demo

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
function applyBlackAndWhiteFilterOnDate(targetDate) {
    var currentDate = new Date();
    var targetMonth = targetDate.split("-")[0];
    var targetDay = targetDate.split("-")[1];

    // 检查当前日期是否与目标日期相等
    if (
        currentDate.getMonth() + 1 === parseInt(targetMonth) &&
        currentDate.getDate() === parseInt(targetDay)
    ) {
        // 将整个 HTML 页面设置为黑白滤镜
        document.documentElement.style.filter = "grayscale(100%)";
    }
}

applyBlackAndWhiteFilterOnDate("12-31");