specify whether or not a file exists in node.js

Question

i use this code to specify whether or not a file exists:

if(fs.exists('../../upload/images/book/2.jpg')){
    console.log("yes the file exist");
} else{
        console.log("there is no file");
      }  

While the file is there, it always says it does not exist(there is no file) i use fs.stat(...) too , but again it gives the result (there is no file)

Folder structure:

root_app  
--------|.tmp  
--------|api  
------------|controllers  
------------------------|BookContoller.js (My code run from here)
--------|...(And the rest of the folders)  
--------|upload  
---------------|images  
----------------------|book  
---------------------------|2.jpg

thank you

Answer 1

fs.exists is asynchronous. To make your code work you could just change it to fs.existsSync.

Also you have the wrong path to your file, you need to use path.resolve or __dirname, so the script will know where to find the file.

if(fs.existsSync(path.resolve('../../upload/images/book/2.jpg'))) {

See documentation:

• fs.exists (deprecated)
• fs.existsSync
• path.resolve

Answer 2

My problem was solved.
Apparently, we should use fs.accessSync() OR fs.access() instead of fs.exists()
Check out this link

This procedure can also be performed:

function Custom_existsSync(filename) {
  try {
    fs.accessSync(filename);
    return true;
  } catch(ex) {
    return false;
  }  

if(Custom_existsSync(filename)){
    ....
}  

Thanks to everyone who helped me