Ignore my last comment, it seems ``isLiveBlog`` is available on the content model (defined [here](https://github.com/guardian/frontend/blob/master/common/app/model/content.scala#L143)). Therefore, to avoid doing the regex test just push that property into the the meta data tuple.

I.e. Change [this line](https://github.com/guardian/frontend/blob/master/common/app/model/content.scala#L140) to:
```Scala
override lazy val metaData: Map[String, Any] = super.metaData + ("content-type" -> contentType, "isLiveBlog" -> isLiveBlog)
```
Then in the JS just write:
```Javascript
if (config.page.isLiveBlog) {
```