client-app/utils/utils.js

//处理头像名称
export const getUserName = (name) => {
    const leng = name.length;
    const pattern = new RegExp(/[0-9a-z]/i);
    if (pattern.test(name)) {
        return name.substr(leng - 3, 3)
    } else {
        return name.substr(leng - 2, 2)
    }
}