{
    "presets": [
        ["env", {
            "targets": {
                "browsers": [
                    "Chrome >= 29",
                    "FireFox >= 22",
                    "Safari >= 7",
                    "Opera >= 12",
                    "Explorer >= 10",
                    "last 4 Edge versions"
                ]
            },
            "useBuiltIns": true
        }],
        "react",
        "stage-2"
    ],
    "ignore": [
        "node_modules"
    ],
    "plugins": [
        "transform-class-properties",
        "syntax-class-properties"
    ]
}