JavaScriptCore / JSExport: Swift methods throwing errors not exported to JavaScript
| Originator: | hello | ||
| Number: | rdar://48767173 | Date Originated: | 2019-03-11 |
| Status: | Open | Resolved: | |
| Product: | macOS + SDK / JavaScriptCore | Product Version: | 10.14.3 |
| Classification: | Bug | Reproducible: | Always |
Methods included in a JSExport protocol in Swift are not exported if they are throwing errors.
// Custom protocol must be declared with `@objc`
@objc public protocol PersonJSExports : JSExport {
/// Not exported because of `throws`
func greet() throws
}
The greet function in the example above is not exported, resulting in the following message.
TypeError: person.greet is not a function. (In 'person.greet()', 'person.greet' is undefined)
The expected behaviour would be to to run `greet()` and throw any error produced within the method in order to handle it properly within JavaScript using a `try...catch...finally block.
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