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In Handlebars, say I have a collection of names. How can I do
{{#each names}} {{position}} {{name}} {{/each}} where {{position}} is 1 for the first name, 2 for the second name, etc.? Do I absolutely have to store the position as a key in the collection?
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Custom Helpers You can create your own helpers to perform complex logics using the expression system that Handlebars provides. There are two kinds of helpers: function helpers and block helpers. The first definition is meant for a single expression, while the latter is used for block expressions.
To iterate over an object with JavaScript and Handlebars. js, we can use the #each keyword. to add the Handlebars script and the template for looping through each entry in data . We use #each this to loop through each array property.
js or <script> tag or anywhere else, you need to have access to Handlebars object, since you are invoking registerHelper method on that object (which injects a helper into that object). After Handlebars has been modified, every module referencing that object will have access to the new helper.
You can do this with the built-in Handlebars @index notation:
{{#each array}} {{@index}}: {{this}} {{/each}} @index will give the (zero-based) index of each item in the given array.
Please note for people using Handlebars with the Razor view engine you must use the notation @@index to avoid compilation errors.
For more built-in helpers see http://handlebarsjs.com/
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