How to check dependency in bash script

I want to check whether nodejs is installed on the system or not. I am getting this error:

Error : command not found.

How can i fix it?

#!/bin/bash

if [ nodejs -v ]; then
echo "nodejs found"
else
echo "nodejs not found"
fi

You can use the command bash builtin:

if command -v nodejs >/dev/null 2>&1 ; then
    echo "nodejs found"
    echo "version: $(nodejs -v)"
else
    echo "nodejs not found"
fi