DOMStringMap is defined as an empty interface - this makes it awkward to use #1852
Description
The DOMStringMap interface is defined as follows:
interface DOMStringMap {
}
declare var DOMStringMap: {
prototype: DOMStringMap;
new(): DOMStringMap;
}This means it's a compile error to directly access the object properties, but it's also an implicit any error if the --noImplicitAny switch is turned on in the compiler. This makes using a node's dataset somewhat arduous since a cast is required.
I'm not sure if there is some way to declare that an object has arbitrary properties of some given type, but perhaps a minimal working solution would be to give this interface a string indexer:
interface DOMStringMap {
[key: string]: string;
}