Focus

Focus blocks of code. Dim the unfocused code. Ensure the focused code is visible when there's overflow.

Useful when you want to change a codeblock focus depending on the user's interaction.

content.md

```js
function lorem(ipsum, dolor = 1) {
  const sit = ipsum == null ? 0 : ipsum.sit
  dolor = sit - amet(dolor)
  return sit ? consectetur(ipsum) : []
}

function ipsum(ipsum, dolor = 1) {
  return dolor
}

// !focus(1:5)
function dolor(ipsum, dolor = 1) {
  const sit = ipsum == null ? 0 : ipsum.sit
  dolor = sit - amet(dolor)
  return sit ? consectetur(ipsum) : []
}
```

function lorem(ipsum, dolor = 1) {
  const sit = ipsum == null ? 0 : ipsum.sit
  dolor = sit - amet(dolor)
  return sit ? consectetur(ipsum) : []
}

function ipsum(ipsum, dolor = 1) {
  return dolor
}

function dolor(ipsum, dolor = 1) {
  const sit = ipsum == null ? 0 : ipsum.sit
  dolor = sit - amet(dolor)
  return sit ? consectetur(ipsum) : []
}

You can also change the focus annotations on a rendered codeblock:

Implementation

// TO DO