TypeError: Buffer.alloc is not a function

Question

From node docs, I am trying some code from Buffer .

When I execute this statement

const buf = Buffer.from('hello world', 'ascii');

it throws an exception: TypeError: Buffer.alloc is not a function

My node version is v5.7.1.

I don't understand why?

Here is the error screen.

Answer 1

The new Buffer API is only available in v5.10.0+, so you'll need to upgrade to use it.

If you want to view the docs for v5.7.1, you can go here.

FWIW the new Buffer API is also now available in node v4.x as of v4.5.0.

Answer 2

This error occurs due to missmatch node version so please node version on my machine like this:

sudo npm cache clean -f
sudo npm install -g n
sudo n stable

Answer 3

if you can do these commands,it should be work.

step 1:

first, you can type this command sudo npm cache clean -f

step 2: Now,you can type this command sudo npm install -g n

step 3:

Now ,you should enter this command sudo n 6.4.0

step 4:

finally, you should enter this command for restart the your system or reboot

shutdown -h now