Hey, You are not accessing the "size" property, but treat "args[0]" as if it were a number (which it is not, it's a ArrayBuffer). Since you have established that args[0] is an ArrayBuffer, you can use cast, which would look roughly like this:
Local<ArrayBuffer> array_buffer = Local<ArrayBuffer>::cast(args[0]); size_t size = array_buffer->ByteLength(); On Mon, Sep 2, 2019 at 12:50 AM Jonathan Doster <jbdos...@gmail.com> wrote: > Hey everyone! > > I am trying to pass an ArrayBuffer from JS to C++, and when I debug the > "size" variable is 0. > I do not understand what I am doing wrong, ultimately my goal is to be > able to read and write the buffer, copy, etc. > Thank you!! > > var api = require('../src/public/api') > api.Method(new ArrayBuffer([1, 2, 3, 4])) > > void Method(const v8::FunctionCallbackInfo<v8::Value> &args) > { > CHECK_ARGS(args, args[0]->IsArrayBuffer()); > uint32_t size = args[0]->Uint32Value(); > } > > > -- > -- > v8-users mailing list > v8-users@googlegroups.com > http://groups.google.com/group/v8-users > --- > You received this message because you are subscribed to the Google Groups > "v8-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to v8-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/v8-users/ed43b406-af94-49f1-94c2-47c09673379d%40googlegroups.com > <https://groups.google.com/d/msgid/v8-users/ed43b406-af94-49f1-94c2-47c09673379d%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/v8-users/CACswSC1LA6dT66X12EOTNTrG29St8tnnHYp8uqhwARtid4ijcA%40mail.gmail.com.