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# IsSafeHTML
Verifies if the HTML is safe using antisamy policy rules.
The policy can be a string name of a built-in policy, a file path to a custom policy XML file, or a struct for programmatic policy configuration. For full struct documentation, see [`getSafeHTML()`](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/getsafehtml.md).
**Built-in policies:** `anythinggoes`, `ebay` (default), `myspace`, `slashdot`, `tinymce`
## Method Signature
```
IsSafeHTML( string, [policy], [force] )
```
### Arguments
| Argument | Type | Required | Description | Default |
| -------- | ---------------- | -------- | --------------------------------------------------------------------------------------- | --------------------------------- |
| `string` | `string` | `true` | The HTML to validate | |
| `policy` | `string\|struct` | `false` | The policy to use: a string name, file path, or a struct for programmatic configuration | `""` (uses default `ebay` policy) |
| `force` | `boolean` | `false` | When `true` and using a struct policy, evicts it from cache and rebuilds it on demand | `false` |
## Examples
### Basic safety check with default eBay policy
```js
result = isSafeHTML( "Hello" )
// result: true
result = isSafeHTML( "Hello" )
// result: false (contains disallowed script tag)
```
### Using a named policy
```js
result = isSafeHTML( "HelloWorld", "myspace" )
// result: true or false depending on whether content violates myspace policy
```
### Custom policy via struct
```js
result = isSafeHTML(
"HelloWorld",
{
basePolicy: "ebay",
allowTags: [ "b", "em" ]
}
)
// result: true (content only contains allowed tags)
```
### Force cache eviction for struct policies
```js
// First call caches the policy
result1 = isSafeHTML( "test", policyStruct )
// Second call uses cached policy (for performance)
result2 = isSafeHTML( "test", policyStruct )
// Force eviction and rebuild
result3 = isSafeHTML( "test", policyStruct, true )
```
## Related
* [Canonicalize](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/canonicalize.md)
* [DecodeFor](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/decodefor.md)
* [DecodeForBase64](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/decodeforbase64.md)
* [DecodeForHTML](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/decodeforhtml.md)
* [DecodeForJson](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/decodeforjson.md)
* [DecodeFromURL](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/decodefromurl.md)
* [EncodeFor](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodefor.md)
* [encodeForCSS](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodeforcss.md)
* [encodeForDN](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodefordn.md)
* [encodeForHTML](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodeforhtml.md)
* [encodeForHTMLAttribute](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodeforhtmlattribute.md)
* [encodeForJavaScript](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodeforjavascript.md)
* [encodeForLDAP](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodeforldap.md)
* [EncodeForSQL](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodeforsql.md)
* [encodeForURL](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodeforurl.md)
* [encodeForXML](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodeforxml.md)
* [encodeForXMLAttribute](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodeforxmlattribute.md)
* [encodeForXPath](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/encodeforxpath.md)
* [esapiDecode](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/esapidecode.md)
* [esapiEncode](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/esapiencode.md)
* [GetSafeHTML](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/getsafehtml.md)
* [SanitizeHTML](/boxlang-framework/modularity/esapi/reference/built-in-functions/esapi/sanitizehtml.md)
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