常用代码

时间日期格式化

Date.prototype.time_format = function (mask) {
    var d = this;
    var zeroize = function (value, length) {
        if (!length) length = 2;
        value = String(value);
        for (var i = 0, zeros = ''; i < (length - value.length); i++) {
            zeros += '0';
        }
        return zeros + value;
    };
    return mask.replace(/"[^"]*"|'[^']*'|\b(?:d{1,5}|M{1,4}|yy(?:yy)?|([hHmstT])\1?|[lLZ])\b/g, function ($0) {
        switch ($0) {
            case 'd':
                return d.getDate();
            case 'dd':
                return zeroize(d.getDate());
            case 'ddd':
                return ['Sun.', 'Mon.', 'Tue.', 'Wed.', 'Thr.', 'Fri.', 'Sat.'][d.getDay()];
            case 'dddd':
                return ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'][d.getDay()];
            case 'ddddd':
                return weeks[d.getDay()];
            case 'M':
                return d.getMonth() + 1;
            case 'MM':
                return zeroize(d.getMonth() + 1);
            case 'MMM':
                return ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'][d.getMonth()];
            case 'MMMM':
                return ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'][d.getMonth()];
            case 'yy':
                return String(d.getFullYear()).substr(2);
            case 'yyyy':
                return d.getFullYear();
            case 'h':
                return d.getHours() % 12 || 12;
            case 'hh':
                return zeroize(d.getHours() % 12 || 12);
            case 'H':
                return d.getHours();
            case 'HH':
                return zeroize(d.getHours());
            case 'm':
                return d.getMinutes();
            case 'mm':
                return zeroize(d.getMinutes());
            case 's':
                return d.getSeconds();
            case 'ss':
                return zeroize(d.getSeconds());
            case 'l':
                return zeroize(d.getMilliseconds(), 3);
            case 'L':
                var m = d.getMilliseconds();
                if (m > 99) m = Math.round(m / 10);
                return zeroize(m);
            case 'tt':
                return d.getHours() < 12 ? 'am' : 'pm';
            case 'TT':
                return d.getHours() < 12 ? 'AM' : 'PM';
            case 'Z':
                return d.toUTCString().match(/[A-Z]+$/);
            default:
                return $0.substr(1, $0.length - 2);
        }
    });
};
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较验邮箱

function IsEmail(str) {
    var reg = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    return reg.test(str);
}
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校验电话

function IsPhoneNumber(phoneNumber) {
    var reg = /^((\d{11})|^((\d{7,8})|(\d{4}|\d{3})-(\d{7,8})|(\d{4}|\d{3})-(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1})|(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1}))$)/;
    return reg.test(phoneNumber);
}
// 是否为中国的电话号码
function IsChinaMobileNumber(phoneNumber) {
    return /^1[34578]\d{9}$/.test(phoneNumber);
}
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转载于:https://juejin.im/post/5bc008d9f265da0afd4b5e97