index.php

<?php

function mix($path, $manifestDirectory = '')
{
    static $manifest;
    if ($manifestDirectory && strpos($manifestDirectory, '/') !== 0) {
        $manifestDirectory = "/{$manifestDirectory}";
    }

    if (! $manifest) {
        if (! file_exists($manifestPath = $manifestDirectory.'/mix-manifest.json')) {
            throw new Exception('The Mix manifest does not exist.');
        }
        $manifest = json_decode(file_get_contents($manifestPath), true);
    }

    if (strpos($path, '/') !== 0) {
        $path = "/{$path}";
    }

    if (! array_key_exists($path, $manifest)) {
        throw new Exception(
            "Unable to locate Mix file: {$path}. Please check your ".
            'webpack.mix.js output paths and try again.'
        );
    }

    return file_exists($manifestDirectory.'/hot')
                ? "http://localhost:8080{$manifest[$path]}"
                : $manifest[$path];
}