_handleFocusin()

in js/bootstrap.bundle.js [4092:4107]

• 16 lines of code
• 6 McCabe index (conditional complexity)

    _handleFocusin(event) {
      const {
        trapElement
      } = this._config;
      if (event.target === document || event.target === trapElement || trapElement.contains(event.target)) {
        return;
      }
      const elements = SelectorEngine.focusableChildren(trapElement);
      if (elements.length === 0) {
        trapElement.focus();
      } else if (this._lastTabNavDirection === TAB_NAV_BACKWARD) {
        elements[elements.length - 1].focus();
      } else {
        elements[0].focus();
      }
    }