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社区首页 >问答首页 >IDB: EventTarget的类型标定义

问IDB: EventTarget的类型标定义
EN

Stack Overflow用户
提问于 2014-03-22 00:12:34
回答 1查看 1.5K关注 0票数 1

我使用IDB和类型记录，并试图定义EventTarget，这样我就可以从它得到结果和错误。

通常，对于操作，一个获得错误作为event.target.error和结果event.target.result。

代码语言：javascript
复制
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);
        };

我试过像下面这样

代码语言：javascript
复制
interface EventTarget {
    error?: any;
    result: any;
}

这就产生了很多无关的错误。我使用最新的开发分支(de583a588d7be350ac5108118a807715fcf83519)。

我能做些什么

代码语言：javascript
复制
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：

我可以看到目标在SVGAElement中使用(或者在事件中)，

代码语言：javascript
复制
interface SVGAElement extends SVGElement, SVGStylable, SVGTransformable, SVGLangSpace, SVGTests, SVGExternalResourcesRequired, SVGURIReference {
    target: SVGAnimatedString;
}

我尝试的是用error和result扩展error。

我不知道EventTarget的这些循环扩展是如何工作的。我对打字本还不熟悉。

代码语言：javascript
复制
interface IDBRequest extends EventTarget {
  onsuccess: (ev: Event) => any;
  onerror: (ev: ErrorEvent) => any;

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

回答 1

Stack Overflow用户

回答已采纳

发布于 2014-03-22 05:37:29

result的类型必须与SVGElement和SVGFilterPrimitiveStandardAttributes完全相同。

如果一个接口接口实现了另一个接口，而子接口没有使用与父接口相同的类型，就会出现此错误：

代码语言：javascript
复制
interface FooEvent{
    data: number;
}

interface BarEvent extends FooEvent{
    data: string;
}
票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/22571707

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