laravel-app-exceptions-handler-render.php

<?php

/**
 * Render an exception into an HTTP response.
 *
 * @param  \Illuminate\Http\Request  $request
 * @param  \Exception  $e
 * @return \Illuminate\Http\Response
 */
public function render($request, Exception $e)
{
    if (config('app.debug') && $request->wantsJson()) {
        return self::renderJson($e);
    }

    return parent::render($request, $e);
}