njseries_03_06.js

class Templater {
    ...
    render(file, context){
        let sourceFile = path.join(this._dir, file)
        let compiledFile = this._compiledFile(file)
        if(!fs.existsSync(sourceFile)){
            throw Error('Template not found!')
        }

        let render = null
        //checks if compiled file exist
        if(this._cached && fs.existsSync(compiledFile)){
            render = require(compiledFile)
            return render(context)
        }

        let ast = this.compile(file)
        this._saveGenCode(file, this.generate(ast))
        render = require(compiledFile)
        return render(context)
    }    
    ...
}