This is the documentation of version 1.0.0-rc.1. Go to the latest version, 1.0.0-rc.5.
TomTom Maps for JavaScript
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    Type Alias RouteProgressAtPoint

    RouteProgressAtPoint: Required<RouteProgress>

    The resolved distance and time at an interpolated position on the route path.

    Both fields are required, because the SDK produces this type only when interpolation fully resolves, meaning both bracketing progress entries carry valid values.