updateConditional(element2, expression) {
      const group = this.findGroupForElement(element2);
      if (group) {
        this.updateConditionalGroup(group);
      } else {
        const context = this.model && this.model.store ? { ...this.model.store.getState() } : this.model && this.model.data ? this.model.data : {};
        const result = ExpressionManager.evaluateExpression(expression, context);
        element2.style.display = result ? "" : "none";
      }
    }
Updates the visibility of DOM elements based on conditional expressions.

This method processes groups of elements with `data-if`, `data-else-if`, and `data-else` attributes,
updating their visibility based on the evaluation of corresponding expressions.

It also sets up dependencies between variables used in the expressions and their corresponding DOM elements,
allowing for dynamic updates when the context or variables change.

This functionality is used to implement conditional rendering in the DOM.

@param {HTMLElement} element - The DOM element to update.
@param {string} expression - The conditional expression to evaluate.
Nodes are expected to contain attributes like `data-if`, `data-else-if`, or `data-else`.