性能接口缺少onresourcetimingbufferfull事件

Question

资源计时API有像onresourcetimingbufferfull这样的事件，当达到150（默认）资源限制时会触发这些事件。 https://www.w3.org/TR/resource-timing-1/#extensions-performance-interface

lib.d.ts文件https://github.com/Microsoft/TypeScript/blob/master/lib/lib.d.ts中的Performance接口没有定义onresourcetimingbufferfull事件。有什么办法可以做到这一点？

Answer 1

当然！你可以简单地增加了Performance接口在自己的代码：

// this does not overwrite `Performance`, it just augments it 
interface Performance { 
    onresourcetimingbufferfull: (e: Event) => any; 
    // and/or perhaps something like 
    addEventListener(type: "resourcetimingbufferfull", handler: (e: Event) => any): void; 
    // in versions of TS before 2.0, you'll need to add this line also: 
    addEventListener(type: string, handler: (e: Event) => any): void; 
} 

function bufferFull(e: Event) { 
    console.log("WARNING: Resource Timing Buffer is FULL!"); 
    performance.setResourceTimingBufferSize(200); 
} 

performance.onresourcetimingbufferfull = bufferFull; 
performance.addEventListener("resourcetimingbufferfull", bufferFull); 

我找不到那个the resourcetimingbufferfull event carried any special payload所以最简单的方法只是把它作为输入一个普通的旧Event。