---
title: Attributes.renderIfPrefixIs()
---

The `Attributes.renderIfPrefixIs()` method will render attributes as a string
suitable for inclusion in an SVG tag, but only those attribute keys who start
with `prefix`.

## Signature

```js
string attributes.renderIfPrefixIs(string prefix)
```

## Example

```js
const attr = new Attributes()
  .add('class', 'various')
  .add('stroke', 'red')
  .add('stroke-width', 2)

const line = `<path ${attr.renderIfPrefixIs('stroke')} d="M 0,0 L 100.0" />`
```