JavaScript中如何读取本地文件内容

Question

I want to start off by saying that I do not think this is a duplicate because any other question I've found of this nature is based on getting the files contents from a document.getElement tag where the user is choosing a file and going from there. I'm trying to read in a file that is in a folder on my computer. In my C drive. I haven't been able to find anything along these lines and would appreciate any help or being pointed in the right direction. I am trying to find out if this is possible or not using raw v8 js.

Answer 1

It depends a lot on the context, and where the file is currently located.

For a user-specified file, your only way of accessing that is asking the user to upload it via a <input type="file"> input element.

For a backend file (ie on your machine), in JS there are multiple different runtimes, all of which have different methods of importing or referencing local files.

You mention in a comment that you're using "raw" JS via the V8 engine, which doesn't have any capabilities for accessing local files.

However, if you set up access to the Node.js ecosystem of libraries you can use the fs file-loading tool, like so:

fs.readFile('filepath', (err, data) => {
  if (err) throw err;
  console.log(data);
});

(docs here )