Question

我将IDB与typescript一起使用，并尝试定义EventTarget，以便从中获取结果和错误。

通常对于操作，我们会将错误视为event.target.error，结果为event.target.result。

var request = objectStore.add(data);
        request.onerror = function(event) {
          console.log(event.target.error)
        }
        request.onsuccess = function(event) {
          callback(event.target.error,event.target.result);
        };

我试过以下

interface EventTarget {
    error?: any;
    result: any;
}

会产生很多无关的错误。我使用最新的开发分支（de583a588d7be350ac5108118a807715fcf83519）。

我能做些什么

Using tsc v1.0.0
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11030,11): error TS2189: Interface 'SVGFEFloodElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11100,11): error TS2189: Interface 'SVGFETileElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11108,11): error TS2189: Interface 'SVGFEBlendElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11139,11): error TS2189: Interface 'SVGFEMergeElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11262,11): error TS2189: Interface 'SVGFEGaussianBlurElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11339,11): error TS2189: Interface 'SVGFESpecularLightingElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11442,11): error TS2189: Interface 'SVGFEMorphologyElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11473,11): error TS2189: Interface 'SVGFEDisplacementMapElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11614,11): error TS2189: Interface 'SVGFEConvolveMatrixElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11664,11): error TS2189: Interface 'SVGFETurbulenceElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11709,11): error TS2189: Interface 'SVGFEColorMatrixElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(11820,11): error TS2189: Interface 'SVGFEOffsetElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(12102,11): error TS2189: Interface 'SVGFEImageElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(12116,11): error TS2189: Interface 'SVGFECompositeElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(12206,11): error TS2189: Interface 'SVGFEComponentTransferElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
/usr/local/lib/node_modules/typescript/bin/lib.d.ts(12214,11): error TS2189: Interface 'SVGFEDiffuseLightingElement' cannot simultaneously extend types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes':
Named properties 'result' of types 'SVGElement' and 'SVGFilterPrimitiveStandardAttributes' are not identical.
>> Compilation failed

编辑：

我可以在SVGAElement（或在事件中）中看到目标，

interface SVGAElement extends SVGElement, SVGStylable, SVGTransformable, SVGLangSpace, SVGTests, SVGExternalResourcesRequired, SVGURIReference {
    target: SVGAnimatedString;
}

我尝试用EventTarget和error扩展result。

我不确定EventTarget的这些循环扩展是如何工作的。我是新手稿。

interface IDBRequest extends EventTarget {
  onsuccess: (ev: Event) => any;
  onerror: (ev: ErrorEvent) => any;

interface Event {
   ....
    target: EventTarget;
    eventPhase: number;
   ....

Answer 1

result和SVGElement的{{1}}类型必须完全相同。

您将收到此错误的一种情况是，如果一个接口接口实现另一个接口，并且子接口不使用与父接口相同的类型：

SVGFilterPrimitiveStandardAttributes

IDB：EventTarget的typescript定义

编辑：

1 个答案: