wojtekmaj/detect-element-overflow

A function that tells you whether a given element is overflowing its container or not. Useful for creating dropdowns and tooltips.

Detect-Element-Overflow

A function that tells you whether a given element is overflowing its container or not. Useful for creating dropdowns and tooltips.

tl;dr

• Install by executing npm install detect-element-overflow or yarn add detect-element-overflow.
• Import by adding import detectElementOverflow from 'detect-element-overflow'.
• Do stuff with it!

  const collisions = detectElementOverflow(child, parent);

User guide

Detect-Element-Overflow returns an object with getter functions described below.

Attribute name	Description	Example values
collidedTop	Whether or not the child element collided with the top parent's border.	true
collidedBottom	Whether or not the child element collided with the bottom parent's border.	true
collidedLeft	Whether or not the child element collided with the left parent's border.	true
collidedRight	Whether or not the child element collided with the right parent's border.	true
overflowTop	How many pixels of the child have crossed the top parent's border. Negative values specify how many pixels are between the child and the top parent's border.	20, -15
overflowBottom	How many pixels of the child have crossed the bottom parent's border. Negative values specify how many pixels are between the child and the bottom parent's border.	20, -15
overflowLeft	How many pixels of the child have crossed the left parent's border. Negative values specify how many pixels are between the child and the left parent's border.	20, -15
overflowRight	How many pixels of the child have crossed the right parent's border. Negative values specify how many pixels are between the child and the right parent's border.	20, -15

License

The MIT License.

Author

Wojciech Maj

detect-element-overflow's Issues

Does not detect when element overflows off the page

Fails to detect when an element goes right off the page:

This is a minor issue for me, but it occurred when the item was the first element on the page.

May be more of a bug with react-date-picker, but eh, this is probably where to address it.

Repro repo:
https://github.com/jameskraus/react-date-picker-overflow