vscode-react-native#606

launch.json

{
    // Utilizar IntelliSense para aprender acerca de los posibles atributos.
    // Mantenga el puntero para ver las descripciones de los existentes atributos 
    // Para más información, visite: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Debug Android",
            "program": "${workspaceRoot}/.vscode/launchReactNative.js",
            "type": "reactnative",
            "request": "launch",
            "platform": "android",
            "sourceMaps": true,
            "outDir": "${workspaceRoot}/.vscode/.react"
        },
        {
            "name": "Debug iOS",
            "program": "${workspaceRoot}/.vscode/launchReactNative.js",
            "type": "reactnative",
            "request": "launch",
            "platform": "ios",
            "sourceMaps": true,
            "outDir": "${workspaceRoot}/.vscode/.react"
        },
        {
            "name": "Attach to packager",
            "program": "${workspaceRoot}/.vscode/launchReactNative.js",
            "type": "reactnative",
            "request": "attach",
            "sourceMaps": true,
            "outDir": "${workspaceRoot}/.vscode/.react"
        },
        {
            "name": "Debug in Exponent",
            "program": "${workspaceRoot}/.vscode/launchReactNative.js",
            "type": "reactnative",
            "request": "launch",
            "platform": "exponent",
            "sourceMaps": true,
            "outDir": "${workspaceRoot}/.vscode/.react"
        }
    ]
}