how to convert

[来福王]

// in express route

res.locals.test = function ('fileId', callback) {

  return 'test(' + arg1 + ',' + String(callback) + ');'

}

res.render('index.html', {title: 'index'})

// in template index.html

{{ test('fileId', "function (M) {

    log('{{ title }}');

}") }}

how to convert  '{{title}}'  to 'index' in 'index.html'

[Carl Meyer]

Remove both the string quotes and the var markers. Just use simply `title` instead of `'{{ title }}'`. You're already within a var context because of the outer curly braces, so you can just refer to vars by name to get their value; you never nest var markers in nunjucks. String quotes within a var context doesn't somehow take you back into a raw-template-data context.

Carl