# render-template `{{render-template 'template string' vars}}` is used to interpolate some dynamic variables into a string and produce a string output as a result i.e. a micro, regex based, template engine. For example: ```hbs preview-template <figure> {{render-template 'http://localhost/?service={{Service.Name}}&datacenter={{Datacenter}}' (hash Datacenter="dc1" Service=(hash Name="Hello-Service" ) ) }} <figcaption>^ that is the rendered template</figcaption> </figure> ``` Additionally the variables passed into the template are automatically URL encoded as our primary usecase for this is for creating dynamic links/URLs. If we ever need to reuse this without URL encoding, then an option could be added as a named argument to disable/turn that off. In which case, encode should be default and a knob provided to turn it off (at the time of writing our primary usecase is to encode). Currently supported separators are mustache style `{{VariableName}}`, although we would like to add Javascript style `${VariableName}` separators in the future and transition to default to those whilst remaining backwards compatible. Mustache style are a documentated user 'feature' for some Consul config, so we should be mindful of that. **Please note:** Our `uri` helper (that is used extensively in the UI) also uses some of the underlying functionality of `render-template` via our `encoder` service. ## Positional Arguments | Argument | Type | Default | Description | | --- | --- | --- | --- | | `template` | `String` | | A template string for the variables to be interpolated into | | `vars` | `Object` | | An object/hash of variables to URL encode and interpolate into the template string |