The container has an overflow set to scroll, however, I would like certain elements to overflow outside of it

Question

The container has an overflow set to scroll, however, I would like certain elements to overflow outside of it

I am facing an issue with a container that has a set overflow-y: scroll property. Within this container, I have multiple elements including a dropdown menu. The challenge lies in ensuring that the dropdown menu can overflow the container as needed. Despite setting its position to absolute, it seems to be relative to elements within the container rather than the container itself.

Here is the CSS for the container:

.container {
  position: static;
  border-radius: 24px;
  box-shadow: 0px 0px 12px rgba(0,71,255,0.4);
  padding: 2rem;
  margin: 1rem;
  width: 100%;
  overflow-y: scroll;
  max-height: 55dvh;
}

CSS for the dropdown menu:

.dropdownmenu {
  z-index: 1000;
  max-height: 400px;
  overflow-y: scroll;
  direction: ltr;
  opacity: 0.9;
  position: absolute;
  margin-top: 8px;
  border: none;
  border-radius: 24px !important;
  display: flex;
  flex-direction: column;
  width: 95%;
}

It is important to note that there are multiple layers of elements within the container, causing the position:absolute property to be relative to inner elements rather than the container itself. This structure needs to remain intact.

css overflow css-position

Answer 1

Answer №1

After some strategic maneuvering, I managed to resolve the issue (although it appears to be the most effective solution based on my research):

To address the problem, I created a new component named PortalContainer:

import ReactDOM from "react-dom";

const PortalContainer = ({ children }) => {
  const portalRoot = document.getElementById("root");

  return ReactDOM.createPortal(children, portalRoot);
};

export default PortalContainer;

To ensure that an element can break free from its parent containing overflow: scroll, I enclosed it within PortalContainer like this:

 <PortalContainer>
       <div
         ref={menuRef}
         style={{
           backgroundColor: colorScheme,
           boxShadow: `3px 3px 3px rgba(0,0,255,0.1)`,
           top:
             dropDirection === "down"
               ? buttonPosition.top
               : buttonPosition.top - dropdownHeight - 100,
           left: buttonPosition.left,
           width: buttonWidth,
           transform: dropDirection === "up" ? "translate(0, 0)" : null,
         }}
         className={`${styles.dropdownmenu} ${
           showDropMenu === item.id ? `${styles.active}` : `${styles.inactive}`
         }`}
       >
         {options?.map((option, index) => {
           return (
             <button
               type="button"
               id={props.index}
               key={index}
               onClick={() =>
                 handleSelect(option.name, props.index, option.id, index)
               }
             >
               {option.name}
             </button>
           );
         })}
       </div>
     </PortalContainer>

This method does the trick, but it would be great if CSS had a feature allowing child elements to escape their parents even when the parent has overflow: hidden/scroll applied. Something like this:

.parent {
overflow: hidden;
} 
.child {
overflowEscape: escape;
}

Answer 2

After some strategic maneuvering, I managed to resolve the issue (although it appears to be the most effective solution based on my research):

To address the problem, I created a new component named PortalContainer:

import ReactDOM from "react-dom";

const PortalContainer = ({ children }) => {
  const portalRoot = document.getElementById("root");

  return ReactDOM.createPortal(children, portalRoot);
};

export default PortalContainer;

To ensure that an element can break free from its parent containing overflow: scroll, I enclosed it within PortalContainer like this:

 <PortalContainer>
       <div
         ref={menuRef}
         style={{
           backgroundColor: colorScheme,
           boxShadow: `3px 3px 3px rgba(0,0,255,0.1)`,
           top:
             dropDirection === "down"
               ? buttonPosition.top
               : buttonPosition.top - dropdownHeight - 100,
           left: buttonPosition.left,
           width: buttonWidth,
           transform: dropDirection === "up" ? "translate(0, 0)" : null,
         }}
         className={`${styles.dropdownmenu} ${
           showDropMenu === item.id ? `${styles.active}` : `${styles.inactive}`
         }`}
       >
         {options?.map((option, index) => {
           return (
             <button
               type="button"
               id={props.index}
               key={index}
               onClick={() =>
                 handleSelect(option.name, props.index, option.id, index)
               }
             >
               {option.name}
             </button>
           );
         })}
       </div>
     </PortalContainer>

This method does the trick, but it would be great if CSS had a feature allowing child elements to escape their parents even when the parent has overflow: hidden/scroll applied. Something like this:

.parent {
overflow: hidden;
} 
.child {
overflowEscape: escape;
}

The container has an overflow set to scroll, however, I would like certain elements to overflow outside of it

Answer №1

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