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HarmonyOS
Demo例子，也会出现，文档代码：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-webview-V5\#deletejavascriptregister
执行了deletejavascriptregister后，前端仍然能调用原生接口，切TestObj一直被持有，退出页面后仍然存在。以下代码是拷贝文档的内容：
// xxx.ets
import { webview } from '@kit.ArkWeb';
import { BusinessError } from '@kit.BasicServicesKit';
class TestObj {
constructor() {
}
test(): string {
return "ArkUI Web Component";
}
toString(): void {
console.log('Web Component toString');
}
}
@Entry
@Component
struct WebComponent {
controller: webview.WebviewController = new webview.WebviewController();
@State testObjtest: TestObj = new TestObj();
@State name: string = 'objName';
build() {
Column() {
Button('refresh')
.onClick(() => {
try {
this.controller.refresh();
} catch (error) {
console.error(`ErrorCode: ${(error as BusinessError).code}, Message: ${(error as BusinessError).message}`);
}
})
Button('Register JavaScript To Window')
.onClick(() => {
try {
this.controller.registerJavaScriptProxy(this.testObjtest, this.name, ["test", "toString"]);
} catch (error) {
console.error(`ErrorCode: ${(error as BusinessError).code}, Message: ${(error as BusinessError).message}`);
}
})
Button('deleteJavaScriptRegister')
.onClick(() => {
try {
this.controller.deleteJavaScriptRegister(this.name);
} catch (error) {
console.error(`ErrorCode: ${(error as BusinessError).code}, Message: ${(error as BusinessError).message}`);
}
})
Web({ src: $rawfile('index.html'), controller: this.controller })
.javaScriptAccess(true)
}
}
}<!-- index.html -->
<!DOCTYPE html>
<html>
<meta charset="utf-8">
<body>
<button type="button" onclick="htmlTest()">Click Me!</button>
<p id="demo"></p>
</body>
<script type="text/javascript">
function htmlTest() {
let str=objName.test();
document.getElementById("demo").innerHTML=str;
console.log('objName.test result:'+ str)
}
</script>
</html>
删除后，调用refresh接口，刷新之后过一段时间就会没了。