Determine file type from a file: import{fileTypeFromFile}from'file-type';console.log(awaitfileTypeFromFile('Unicorn.png'));//=> {ext: 'png', mime: 'image/png'} Determine file type from a Uint8Array/ArrayBuffer, which may be a portion of the beginning of a file: import{fileTypeFromBuff...
一般来说,前端上传都是input的accept那边限制一下,然后通过文件名的后缀再拦截一下,我是从来没有通过字节流去判断文件类型。有找到一个file-type的npm包,专门做这个的,下载试了一下,也可以去npm官网看看: 安装:npm install file-type 复制的几个说明: Detect the file type of a Buffer/Uint8Array/ArrayBuffer ...
file-type 可以直接检测一个Buffer数据流,得到这个Buffer数据的内容(文件)类型。 file-type 的原理是检测文件/数据的Magic Number。通常情况下,一些知名的文件类型,在其文件开头的几个字节用来标志其文件类型,这几个字节就叫做 Magic Number。比如,PDF文件开头的几个字节是 (hex: )。 file-type 现在已经支持的文件...
file-type 原理 file-type 可以直接检测一个Buffer数据流,得到这个Buffer数据的内容(文件)类型。 file-type 的原理是检测文件/数据的Magic Number。通常情况下,一些知名的文件类型,在其文件开头的几个字节用来标志其文件类型,这几个字节就叫做 Magic Number。比如,PDF文件开头的几个字节是%PDF(hex:25504446)。 file...
一般来说,前端上传都是input的accept那边限制一下,然后通过文件名的后缀再拦截一下,我是从来没有通过字节流去判断文件类型。有找到一个file-type的npm包,专门做这个的,下载试了一下,也可以去npm官网看看: 安装:npm install file-type 复制的几个说明: ...
importfileTypeCheckerfrom"file-type-checker";// ... Read file as `Array<number>`, `ArrayBuffer`, or `Uint8Array`.fileTypeChecker.detectFile(file);// Returns the detected file infofileTypeChecker.validateFileType(file,["png","gif","jpeg"]);// Returns true if the file is an image from ...
typescript(), eslint(), babel({ exclude: "node_modules/**" }), ], }; 这里我们将打包成commonjs、esm和umd三种模块规范的包,然后是生产环境的配置,加入terser和filesize分别进行压缩和查看打包大小: import { terser } from "rollup-plugin-terser"; ...
Default: false Type: BooleanWhen set file: protocol dependencies will be packed and installed as regular dependencies instead of creating a symlink. This option has no effect on workspaces.AlgorithmGiven a package{dep} structure: A{B,C}, B{C}, C{D}, the npm install algorithm produces:...
Type: "global", "user", or "project"When passed to npm config this refers to which config file to use.When set to "global" mode, packages are installed into the prefix folder instead of the current working directory. See folders for more on the differences in behavior.packages...
About towriteto D:\LiFile\code\cs\package.json: {"name":"sdrv","version":"0.0.1","description":"描述内容","main":"index.js","scripts": {"test":"测试命令"},"repository": {"type":"git","url":"git远程仓库"},"keywords": ["描述这个包的关键词"],"author":"axelccc","license...