_getPopperConfig()

in _/js/bootstrap.esm.js [3462:3500]


  _getPopperConfig(attachment) {
    const defaultBsPopperConfig = {
      placement: attachment,
      modifiers: [{
        name: 'flip',
        options: {
          fallbackPlacements: this._config.fallbackPlacements
        }
      }, {
        name: 'offset',
        options: {
          offset: this._getOffset()
        }
      }, {
        name: 'preventOverflow',
        options: {
          boundary: this._config.boundary
        }
      }, {
        name: 'arrow',
        options: {
          element: `.${this.constructor.NAME}-arrow`
        }
      }, {
        name: 'preSetPlacement',
        enabled: true,
        phase: 'beforeMain',
        fn: data => {
          // Pre-set Popper's placement attribute in order to read the arrow sizes properly.
          // Otherwise, Popper mixes up the width and height dimensions since the initial arrow style is for top placement
          this._getTipElement().setAttribute('data-popper-placement', data.state.placement);
        }
      }]
    };
    return {
      ...defaultBsPopperConfig,
      ...execute(this._config.popperConfig, [defaultBsPopperConfig])
    };
  }