How to solve an error when installing a package using composer?

Question

Composer

I have ubuntu, installed composer globally, here is the content of composer.json

{
    "require": {
        "fxp/composer-asset-plugin": "^1.2.0"
    
}

Now I'm trying to install phpunit globally
composer global require phpunit/phpunit
and I'm getting this error

[Seld\JsonLint\ParsingException]               
  "./composer.json" does not contain valid JSON  
  Parse error on line 5:                         
  ...n": "^1.2.0"    }                           
  -------------------^                           
  Expected one of: '}', ','

What could be the problem, maybe in the plugin version, if so, how to update it.
I will be glad to help.

Answer 1

The closing bracket is missing, right in your attached code:

{
    "require": {
        "fxp/composer-asset-plugin": "^1.2.0"
    <b>}</b>
}