What is the options parameter in a Handlebars helper function?
assemble, handlebars.js
Solution
The handlebars example for `each` is a block helper, which means that there is more markup or template syntax between the `{{#each}}` and `{{/each}}` tags. When you use this syntax, Handlebars passes an `options` parameter to your helper as the last argument. The `options` object contains a `fn` method that works just like a compiled template... `var html = options.fn(context);` gives you the rendered template from inside the block.
The `context` variable is the thing that you're passing into your helper and can be any number of arguments if you want more.
Since you're making an inline helper and a not a block helper, I think you only need to change one line...
return compImg[opts.fn(context)];
to
return compImg[context];
Problem
I am creating a custom handlebar helper but it always throws `Object #<Object> has no method 'fn'` when compiled through the terminal. My handlebar helper is: ``` module.exports.register = function (Handlebars, opts, params) { Handlebars.registerHelper('compimg', function (context, opts) { var compImg = ["assets/img/icon-nope.png","assets/img/icon-check.png"]; return compImg[opts.fn(context)]; }); } ``` My .hbs file is: ``` {{#each checkable}} <div class="col-md-3 col-xs-3 icon-container"><img src="{{compimg this}}"></div> {{/each}} ``` My JSON file is: ``` { "desc": "blablabla", "checkable": [ 1, 1, 1, 1 ] } ``` When I checked the official documentation I found this piece of code. Can someone explain what exactly `context` and `options` are here? ``` Handlebars.registerHelper('each', function(context, options) { var ret = ""; for(var i=0, j=context.length; i<j; i++) { ret = ret + options.fn(context[i]); } return ret; }); ```