js cookie操作

存cookie

function setCookie(name, value) {
    const Days = 30000;
    let exp = new Date();
    exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);
    document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
}

取cookie

function getCookie(name) {
    let arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
    if (arr = document.cookie.match(reg)) {
        return unescape(arr[2]);
    } else { return null; }
}

清除cookie

function clearCookie() {
    var date = new Date();
    date.setTime(date.getTime() - 10000);
    var keys = document.cookie.match(/[^ =;]+(?=\=)/g);
    if (keys) {
        for (var i = keys.length; i--;)
            document.cookie = keys[i] + "=0; expire=" + date.toGMTString() + "; path=/";
    }
}

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