* Add a new polygon to be merged. */

* Given an initial placement, returns all the subsequent placements * clockwise (or counter-clockwise). * * @method * @memberof Popper.Uti

* Utility used to transform the `auto` placement to the placement with more * available space. * @method * @memberof Popper.Utils * @argum

The encoder is composed of a stack of identical layers returned by calling encoder_layer.

* Finds the offset parent common to the two provided nodes * @method * @memberof Popper.Utils * @argument {Element} element1 * @argument {

A = Y2 - Y1 B = X1 - X2 C = X2*Y1 - X1*Y2 AX+BY+C=0 直线一般方程

* Finds the first parent of an element that has a transformed property defined * @method * @memberof Popper.Utils * @argument {Element} eleme

* Get the outer sizes of the given element (offset size + margins) * @method * @memberof Popper.Utils * @argument {Element} element * @ret

* Get offsets to the popper * @method * @memberof Popper.Utils * @param {Object} position - CSS position the Popper will get applied * @pa

* Returns the reference node of the reference object, or the reference object itself. * @method * @memberof Popper.Utils * @param {Element|Ob

* Get offsets to the reference element * @method * @memberof Popper.Utils * @param {Object} state * @param {Element} popper - the popper e

* Finds the root node (document, shadowDOM root) of the given element * @method * @memberof Popper.Utils * @argument {Element} node * @ret

* Get the window associated with the element * @argument {Element} element * @returns {Window}

Get boxes from the contour or box. :param contour: The predicted contour. :return: The predicted box.