I am trying to upload multiple files to the server sequentially. Before the next iteration, I want the result of the first iteration. I have tried many solutions with RxJS especially with concatMap with no luck.

I ended up using async method and await each response, before going to the next iteration as shown below. I would be keen to see if it is possible to achieve with purely Rxjs.

async updateDoc(files: any) {
    for (let i = 0; i < files.length; i++) {
        let updatedDocObj = {
            ...document,
            file: {
                date: files[i].lastModified,
                fileName: files[i].name,
            },
        };
        const success = await this.myService.uploadMultipleFiles(
            updatedDocObj,files[i]);
    }
}