BrowserApi Documentation

Typed C# wrappers for every browser API — generated from W3C/WHATWG specs.

BrowserApi brings the entire browser API surface to C# with full type safety, zero JavaScript, and IntelliSense for every property and method.

Packages

Package	Description
BrowserApi	Core types — DOM, CSS, Canvas, Fetch, Storage, Events, Animations. Zero dependencies.
BrowserApi.JSInterop	Blazor WebAssembly backend using IJSRuntime.
BrowserApi.Blazor	DI registration, component base class, lifecycle hooks.
BrowserApi.Runtime	Server-side JS execution via Jint — tests without a browser, SSR, sandboxed scripts.

Quick Start

@inherits BrowserApiComponentBase

@code {
    protected override async Task OnBrowserApiReadyAsync() {
        // Typed DOM access — no JavaScript needed
        var input = Document.QuerySelector<HtmlInputElement>("#email");
        input.Value = "hello@example.com";

        // Typed events
        input.OnInput(e => Console.WriteLine("Changed!"));

        // Fetch API
        var users = await Http.GetAsync<List<User>>("/api/users");

        // Canvas
        var ctx = Document.QuerySelector<HtmlCanvasElement>("canvas")!.GetContext2D();
        ctx.SetFill(CssColor.Red).FillRect(0, 0, 100, 50);

        // Animations
        input.FadeIn(500);
    }
}

API Reference

Browse the full API reference in the left navigation, organized by namespace:

• BrowserApi.Common — Core abstractions (JsObject, IBrowserBackend, JsBatch)
• BrowserApi.Dom — DOM types, query extensions, typed events
• BrowserApi.Css — CSS value types (Length, CssColor, Transform, etc.)
• BrowserApi.Canvas — Canvas 2D fluent API
• BrowserApi.Fetch — HTTP client (Http.Get/Post, RequestBuilder)
• BrowserApi.Animations — Web Animations (Easing, KeyframeBuilder)
• BrowserApi.WebStorage — Typed localStorage/sessionStorage
• BrowserApi.Runtime — Server-side BrowserEngine via Jint