JS截取文件后缀名

Posted 2020-11-05 _Iniesta

let fileName = this.file.name.lastIndexOf(".");//取到文件名开始到最后一个点的长度
let fileNameLength = this.file.name.length;//取到文件名长度
let fileFormat = this.file.name.substring(fileName + 1, fileNameLength);//截
console.log(fileFormat);