javascript 比量str今天的日期是，参数diff

function isToday(str) {
    var d = new Date(str.replace(/-/g, "/"));
    var todaysDate = new Date();
    if (d.setHours(0, 0, 0, 0) == todaysDate.setHours(0, 0, 0, 0)) {
        return true;
    } else {
        return false;
    }
}

by default7#zbphp.com

自己改动。添加diff參数。 diff为天数

function isToday(str, diff) {
    var d = new Date(str.replace(/-/g, "/"));
    var todaysDate = new Date();
    if (!isNaN(diff)) {
        d.setDate(d.getDate() + diff);
    }

    if (d.setHours(0, 0, 0, 0) == todaysDate.setHours(0, 0, 0, 0)) {
        return true;
    } else {
        return false;
    }
}

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