Method set_ui_value

marimo/_code_mode/_context.py:1800–1820

Queue a UI element value update. Triggers reactive re-execution the same way a user interaction would. Updates are flushed as a single batch on context exit. Examples: ```python slider = ctx.globals["my_slider"] ctx.set_ui_value(slider, 4

(self, element: Any, value: Any)

    # ------------------------------------------------------------------

    def set_ui_value(self, element: Any, value: Any) -> None:
        """Queue a UI element value update.

        Triggers reactive re-execution the same way a user interaction
        would. Updates are flushed as a single batch on context exit.

        Examples:
            ```python
            slider = ctx.globals["my_slider"]
            ctx.set_ui_value(slider, 42)

            dropdown = ctx.globals["color_picker"]
            ctx.set_ui_value(dropdown, "red")
            ```

        Args:
            element: A marimo UI element (e.g. `mo.ui.slider`).
            value: The new value, matching the type the element expects.
        """
        self._require_entered()
        self._ui_updates.append((UIElementId(element._id), value))

    # ------------------------------------------------------------------
    # Low-level primitives