Q. default generation by express-generator

express --hbs projectname

in app.js

// view engine setup

app.set('views', path.join(__dirname, 'views'));

app.set('view engine', 'hbs');

Builtin handlebars is using views/layout.hbs by default as a master page.

Q.How to specify layout to use as part of the render call

If I create a new layout called other.hbs

res.render('view', { title: 'my other page', layout: 'other' });

To override this for the entire application, you can use

app.set('view options', { layout: 'other' });

Q. Handlebars expression

A handlebars expression is a {{, some contents, followed by a }}

<h1>{{title}}</h1>

This expression means "look up the titleproperty in the current context".

Q. Handlebars helper

You can register a helper with the Handlebars.registerHelper method.

Q. Handlebars helper or HTML escaping

If you don't want Handlebars to escape a value, use the "triple-stash", {{{

{{{link story}}}

In this case, link is the name of a Handlebars helper, and story is a parameter to the helper.

Handlebars will not escape a Handlebars.SafeString. If you write a helper that generates its own HTML, you will usually want to return a new Handlebars.SafeString(result). When using SafeString all unknown or unsafe data should be manually escaped with theescapeExpression()method

Q. Block expression

These block helpers are identified by a #preceeding the helper name and require a matching closing mustache, /, of the same name

Q. Partials

Handlebars partials allow for code reuse by creating shared templates. In order to use a partial, it must be registered via Handlebars.registerPartial.

Handlebars.registerPartial('myPartial', '{{name}}')

Calling the partial is done through the partial call syntax:

{{> myPartial }}