js-random-pasword

js-random-pasword.js

/*
 *@desc   randPassword 生成随机密码
 *@params {Object}  -option 
 *@params {Number}  -option.len     密码长度，默认8位
 *@params {Boolean} -option.special 是否包含特殊字符，默认不包含
 */
function randPassword(option) {
    let arr = ['abcdefghijklmnopqrstuvwxyz', 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', '1234567890', '~!@#$%^&*()_+";",./?<>'];
    const rand = (min, max) => {
        let num = Math.floor(Math.max(min, Math.random() * max));
        if (num === max) {
            return num - 1;
        } else {
            return num;
        }
    }
    if (!option) {
        option = {};
    }
    if (!option.len) {
        option.len = 8;
    }
    let endIndex = 2;
    if (option.special) {
        endIndex = 3;
    }
    let pw = '';
    for (var i = 0; i < option.len; i++) {
        let arrIndex = rand(0, endIndex);
        pw += arr[arrIndex].charAt(rand(0, arr[arrIndex].length));
    }
    return pw;
}