标签：const 后缀 getFileExtension 前端 fileName fileExt 获取 return includes
getFileExtension = (fileName) => {
return fileName.substring(fileName.lastIndexOf('.') + 1)
}
const isExcel = (fileName) => {
const fileExt = getFileExtension(fileName)
return ['xlsx', 'xls'].includes(fileExt)
}
const isJsonFile = (fileName) => {
const fileExt = getFileExtension(fileName)
return ['json'].includes(fileExt)
}
标签：const,
后缀,
getFileExtension,
前端,
fileName,
fileExt,
获取,
return,
includes
From： https://www.cnblogs.com/luckyitape/p/17138196.html