I am attempting to determine if a file exists. If it does not exist, I would like my code to continue so it will be created. When I use the following code, if the file exists, it prints that 'it exists'. If it does not exist, it crashes my app. Here is my code:
var checkDuplicateFile = function(){
var number = room.number.toString();
var stats = fs.statSync(number);
if(stat){
console.log('it exists');
}else{
console.log('it does not exist');
}
};
Your application is crashing because you're not wrapping your fs.statSync in a try/catch block. Sync functions in node don't return the error like they would in their async versions. Instead, they throw their errors which need to be caught.
try {
var stats = fs.statSync(number);
console.log('it exists');
}
catch(err) {
console.log('it does not exist');
}
If your app doesn't require this operation to be synchronous (block further execution until this operation is finished) then I would use the async version.
fs.stat(number, function(err, data) {
if (err)
console.log('it does not exist');
else
console.log('it exists');
});
Answer for post-2020 (v15 and up):
fs.statSync("some-file", { throwIfNoEntry: false })
