Integrates JavaScript engines across platforms, enabling JavaScript evaluation and bridging through a multiplatform API. Offers V8 engine support for JVM/Android and native support for iOS/macOS.
A Kotlin Multiplatform library that provides JavaScript engine integration for multiple platforms (Android, iOS, macOS, JVM).
JsWebViewContext executes scripts through the native WebView API, including on pages with script-src 'none' or without unsafe-eval. It preserves access to the page's globals and DOM, object identity, functions, promises and JavaScript exceptions. The page's CSP still applies to explicit eval() calls made by page or plugin code.
The bridge parses scripts with a bundled Acorn parser and captures their completion values before native execution. See the evaluation implementation notes for the protocol and parser update procedure.
Primitive JavaScript BigInt values are exposed as JsNumber with Double precision and are passed back to JavaScript as number. Boxed BigInt values (Object(1n)) remain JsObject instances and retain their JavaScript object identity.
On JVM, Javet 5.0.11 can truncate some BigInt values outside the signed 64-bit range before the bridge receives them; for example, 9223372036854775808n can acquire the wrong sign. Convert such values explicitly with Number(value) in JavaScript to avoid this limitation. The bridge does not add JavaScript wrappers to ordinary operations to work around it.
JsContext().use { context ->
val sum = jsScoped(context) {
context.globalThis["sumOf"] = JsFunction { args ->
JsNumber(args.sumOf { it.double })
}
eval("sumOf(1, 2, 3, 4, 5)").double
}
println("sum = $sum") // sum = 15.0
}A Kotlin Multiplatform library that provides JavaScript engine integration for multiple platforms (Android, iOS, macOS, JVM).
JsWebViewContext executes scripts through the native WebView API, including on pages with script-src 'none' or without unsafe-eval. It preserves access to the page's globals and DOM, object identity, functions, promises and JavaScript exceptions. The page's CSP still applies to explicit eval() calls made by page or plugin code.
The bridge parses scripts with a bundled Acorn parser and captures their completion values before native execution. See the evaluation implementation notes for the protocol and parser update procedure.
Primitive JavaScript BigInt values are exposed as JsNumber with Double precision and are passed back to JavaScript as number. Boxed BigInt values (Object(1n)) remain JsObject instances and retain their JavaScript object identity.
On JVM, Javet 5.0.11 can truncate some BigInt values outside the signed 64-bit range before the bridge receives them; for example, 9223372036854775808n can acquire the wrong sign. Convert such values explicitly with Number(value) in JavaScript to avoid this limitation. The bridge does not add JavaScript wrappers to ordinary operations to work around it.
JsContext().use { context ->
val sum = jsScoped(context) {
context.globalThis["sumOf"] = JsFunction { args ->
JsNumber(args.sumOf { it.double })
}
eval("sumOf(1, 2, 3, 4, 5)").double
}
println("sum = $sum") // sum = 15.0
}