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38 lines
26 KiB
Markdown
38 lines
26 KiB
Markdown
---
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title: "assert"
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excerpt: "Check a value at runtime, and raise an error if the argument provided"
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layout: manual
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---
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Check a value at runtime, and raise an error if the argument provided
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is false.
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```js
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assert(data: bool, message: string) -> ()
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```
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### Arguments
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| Name | Type | Description | Required |
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|----------|------|-------------|----------|
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| `data` | `bool` | | Yes |
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| `message` | `string` | | Yes |
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### Returns
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`()`
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### Examples
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```js
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const myVar = true
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assert(myVar, "should always be true")
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```
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