ab3204f9f1
The replaces the NextJS site powering FreeSewing.dev with a Docusaurus setup. It's part of my efforts to simplify FreeSewing's setup so we can focus on our core value proposition.
27 lines
534 B
Text
27 lines
534 B
Text
---
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title: Attributes.setIfUnset()
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---
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The `Attributes.setIfUnset()` method sets the attribute identified by `key` to
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value `value` but only if it's currently unset (`undefined`).
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## Signature
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```js
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Attributes attributes.setIfUnset(string key, string value)
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```
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## Example
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```js
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const attr = new Attributes()
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.setIfUnset('class', 'classA')
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.setIfUnset('class', 'classB')
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const class = attr.get('class')
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// class now holds: "classA"
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```
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## Notes
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This will never overwrite any value and thus is a safe way to set attributes
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