What is the process for expanding declared variables in lib.d.ts?

Recently, I came across a Javascript library called History.js

History.js acts as a wrapper for the history object in Javascript, allowing for seamless cross-platform functionality.

While using it in a standard Javascript environment is straightforward, such as with this syntax: History.pushState(data, title, url);

I am interested in utilizing it in a Typescript environment. This presents a challenge as I need to declare the functions/variables in a d.ts file, but the History variable is already defined in the default lib.d.ts.

I located the variable declarations here (line 10475, 10485 & 16363):

interface History {
    length: number;
    state: any;
    back(distance?: any): void;
    forward(distance?: any): void;
    go(delta?: any): void;
    pushState(statedata: any, title?: string, url?: string): void;
    replaceState(statedata: any, title?: string, url?: string): void;
}

declare var History: {
    prototype: History;
    new (): History;
}

declare var history: History;

Now, my question is how I can effectively utilize the History.js library in Typescript. How can I write "History.pushState(data, title, url);" in Typescript?

I believe I need to modify the "declare var History:{...}" to this (Correct me if I'm wrong):

declare var History: {
    prototype: History;
    new (): History;
    pushState(data: any, title: string, url: string): void;
}

Following this adjustment, I should be able to use History.pushState(...); in my Typescript code.

However, I am unable to save the lib.d.ts file as it is protected. Furthermore, even if I could save it, using it in different projects without History.js might lead to errors (as I believe lib.d.ts is shared across all projects).

So, how can I overcome this challenge?

Answer №1

Recently discovered that there is another Definitely Typed library created by other individuals who encountered the same issue and came up with a different solution.

Check out their approach here

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