起因

因在项目业务场景中需要根据文件后缀显示对应文件图标，因此有了以下CODE，听取了同事的建议适用 哈希Map进行键值对匹配

// 识别文件后缀返回对应的图标
export function adapterFileType(e) {
const typeObject = new Map([
    ['default', 'other'],
    ['doc', 'word'],
    ['docx', 'word'],
    ['xls', 'excel'],
    ['xlsx', 'excel'],
    ['txt', 'txt'],
    ['png', 'jpg'],
    ['jpg', 'jpg'],
    ['jpeg', 'jpg'],
    ['swf', 'jpg'],
    ['svg', 'jpg'],
    ['pdf', 'pdf'],
    ['ppt', 'ppt'],
    ['pptx', 'ppt'],
    ['webm', 'video'],
    ['mp4', 'video'],
    ['ogg', 'video'],
    ['zip', 'zip'],
    ['7z', 'zip'],
    ['rar', 'zip'],
    ['cab', 'zip']
])
try {
    if (!e || e == undefined || e == "") throw "this's empty object"
    let suffix = e.split(".")
    if (suffix.length == 0) throw "The length of the corresponding filters no results"
    else {
        // 文件后缀 
        let suffix_type = suffix[suffix.length - 1].toLowerCase(),
            suffix_icon;

        let data = typeObject.get(suffix_type)
        data = data ? data : typeObject.get("default")
        return {
            img: require(`@/staff-pages/static/icons/${data}.svg`)
        }
    }
} catch (err) {
    return {
        img: typeObject.get("default")
    }
}
}