lib/handlebars/helpers/block-helper-missing.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

import {isArray} from '../utils';

export default function(instance) {
  instance.registerHelper('blockHelperMissing', function(context, options) {
    let inverse = options.inverse,
        fn = options.fn;

    if (context === true) {
      return fn(this);
    } else if (context === false || context == null) {
      return inverse(this);
    } else if (isArray(context)) {
      if (context.length > 0) {
        return instance.helpers.each(context, options);
      } else {
        return inverse(this);
      }
    } else {
      return fn(context, options);
    }
  });
}