App Render - Expressjs

<h3 id='app.render'>app.render(view, [locals], callback)</h3>

Returns the rendered HTML of a view via the callback function. It accepts an optional parameter that is an object containing local variables for the view. It is like res.render(), except it cannot send the rendered view to the client on its own.

<div class="doc-box doc-info" markdown="1"> Think of `app.render()` as a utility function for generating rendered view strings. Internally `res.render()` uses `app.render()` to render views. </div> <div class="doc-box doc-warn" markdown="1"> The `view` argument performs file system operations like reading a file from disk and evaluating Node.js modules, and as so for security reasons should not contain input from the end-user. </div> <div class="doc-box doc-warn" markdown="1"> The `locals` object is used by view engines to render a response. The object keys may be particularly sensitive and should not contain user-controlled input, as it may affect the operation of the view engine or provide a path to cross-site scripting. Consult the documentation for the used view engine for additional considerations. </div> <div class="doc-box doc-notice" markdown="1"> The local variable `cache` is reserved for enabling view cache. Set it to `true`, if you want to cache view during development; view caching is enabled in production by default. </div>

app.render('email', (err, html) => {
  // ...
})

app.render('email', { name: 'Tobi' }, (err, html) => {
  // ...
})