Variable VisualTestConst

Type Declaration

• captureCanvas: function

  • captureCanvas(): string | null

    Capture the current canvas as a data URL. Can be used to store baseline screenshots.

    Returns string | null

• clearBaselines: function

  • clearBaselines(): void

    Clear all baselines

    Returns void

• compareImages: function

  • compareImages(
        imgA: string,
        imgB: string,
        sampleRate?: number,
        threshold?: number,
    ): Promise<{ diffCount: number; match: number }>

    Compare two data URL images by pixel sampling.

    Parameters

    • imgA: string
    • imgB: string
    • sampleRate: number = 10
    • threshold: number = 30

    Returns Promise<{ diffCount: number; match: number }>

• compareToBaseline: function

  • compareToBaseline(
        name: string,
        sampleRate?: number,
    ): Promise<{ diffCount: number; match: number } | null>

    Compare current canvas against a saved baseline. Returns a similarity score (0-1, where 1 = identical). Uses pixel sampling for performance.

    Parameters

    • name: string
    • sampleRate: number = 10

    Returns Promise<{ diffCount: number; match: number } | null>

• listBaselines: function

  • listBaselines(): string[]

    List all saved baseline names

    Returns string[]

• loadBaseline: function

  • loadBaseline(name: string): string | null

    Load a baseline screenshot from localStorage.

    Parameters

    • name: string

    Returns string | null

• loadImage: function

  • loadImage(dataUrl: string): Promise<HTMLImageElement>

    Load an image from a data URL

    Parameters

    • dataUrl: string

    Returns Promise<HTMLImageElement>

• saveBaseline: function

  • saveBaseline(name: string): void

    Save a baseline screenshot to localStorage.

    Parameters

    • name: string

    Returns void