zed-industries/zed · error

Failed to set canvas {property} style: {error:?}

Error message

Failed to set canvas {property} style: {error:?}

What it means

Guard in WebWindow::prepare_canvas: CSSStyleDeclaration.setProperty threw while applying the fullscreen sizing styles (width/height/display/outline/touch-action) to the canvas — {property} names the style that failed, {error:?} the JS exception.

Source

Thrown at crates/gpui_web/src/window.rs:132

            .create_element("canvas")
            .map_err(|error| anyhow::anyhow!("Failed to create canvas element: {error:?}"))?
            .dyn_into()
            .map_err(|error| anyhow::anyhow!("Created element is not a canvas: {error:?}"))?;
        canvas.set_tab_index(-1);

        let style = canvas.style();
        for (property, value) in [
            ("width", "100%"),
            ("height", "100%"),
            ("display", "block"),
            ("outline", "none"),
            ("touch-action", "none"),
            ("-webkit-touch-callout", "none"),
            ("user-select", "none"),
            ("-webkit-user-select", "none"),
        ] {
            style.set_property(property, value).map_err(|error| {
                anyhow::anyhow!("Failed to set canvas {property} style: {error:?}")
            })?;
        }

        let body = document
            .body()
            .ok_or_else(|| anyhow::anyhow!("No `body` found on document"))?;
        body.append_child(&canvas)
            .map_err(|error| anyhow::anyhow!("Failed to append canvas to body: {error:?}"))?;
        Ok(canvas)
    }

    #[allow(clippy::too_many_arguments)]
    pub(crate) fn new(
        _handle: AnyWindowHandle,
        _params: WindowParams,
        context: &WgpuContext,
        canvas: web_sys::HtmlCanvasElement,
        surface: wgpu::Surface<'static>,

View on GitHub (pinned to 9d272b0363)

Solutions

1. Log which property failed — usually a CSP style-src restriction or an unusual CSSOM
2. Ensure the embedding page's CSP allows inline style manipulation
3. Fall back to setting style attributes directly (setAttribute) if setProperty is blocked

When it happens

Trigger: Thrown at crates/gpui_web/src/window.rs:99 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zed-industries/zed@9d272b0363 (2026-09-12). Data as JSON: /api/errors/2a77b1eb8efc186e. Report an issue: GitHub.