Composer update error

gistfile1.txt

When running any composer commands, sometimes you see the following error stack:

```
                                                                          
  [ReflectionException]                                                   
  Class Fxp\Composer\AssetPlugin\Repository\NpmRepository does not exist  
                                                                          

                                                                                                    
  [ErrorException]                                                                                  
  Declaration of Fxp\Composer\AssetPlugin\Repository\AbstractAssetsRepository::whatProvides() shou  
  ld be compatible with Composer\Repository\ComposerRepository::whatProvides(Composer\DependencyRe  
  solver\Pool $pool, $name, $bypassFilters = false) 
  
```

To correct this, you need to install/update **fxp/composer-asset-plugin** plugin. You can do that by running the following commands:

```
composer global require fxp/composer-asset-plugin --no-plugins // For installing it first time
composer global update fxp/composer-asset-plugin --no-plugins // For updating plugin, if already installed

```

Great!!
Thank you, very helpful

Working for me, thanks so much!

Thank you, It's working for me. But Somebody should do it on the composer folder, it not work folder(Even if you set global environment variables on the Windows ).
translate to Chinese：谢谢，这对我来说很有用。但是得注意的是：必须在composer 目录，而不是工作目录(即使你在Windows设置了全局变量)

composer global require fxp/composer-asset-plugin --no-plugins // 第一步 安装
composer global update fxp/composer-asset-plugin --no-plugins // 第二步 升级插件

Thank you, very helpful

Helped me! Thank you!

I have done all of these, but still I had the same problem. I removed vendor/fxp and it fixed.

I have been trying all kind of solutions and the only way I was able to fix it was following the steps mentioned here.