Update: "Mui V5 - Eliminate collapse/expand icons in TreeView and reduce TreeItem indentation"

My current project involves Mui V5 and I am looking to customize the TreeView component. Specifically, I need to remove the collapse/expand icons as I want them to be integrated into the TreeItem label component on the left side instead of the right. Additionally, I aim to eliminate the indentation of the TreeItems. How can I achieve this customization?

Answer №1

It seems that achieving the desired indentation effect with TreeView or TreeItem props directly is not possible. By omitting the defaultCollapseIcon and defaultExpandIcon props, you can remove icons altogether.

To customize the styling for the desired outcome, consider this example that demonstrates a TreeView without icons or indentation:

const StyledTreeView = styled(TreeView)`
  .MuiTreeItem-group {
    margin-left: 0;
  }
`;

const StyledTreeItem = styled(TreeItem)`
  .MuiTreeItem-iconContainer {
    display: none;
  }
`;

export default function App() {
  return (
    <StyledTreeView aria-label="tree">
      <StyledTreeItem nodeId="1" label="Item 1">
        <StyledTreeItem nodeId="2" label="Subitem 1-1" />
      </StyledTreeItem>
      <StyledTreeItem nodeId="5" label="Item 2">
        <StyledTreeItem nodeId="10" label="Subitem 2-1" />
        <StyledTreeItem nodeId="6" label="Subitem 2-2">
          <StyledTreeItem nodeId="8" label="Subitem 2-2-1" />
        </StyledTreeItem>
      </StyledTreeItem>
    </StyledTreeView>
  );
}

The customized styling in TreeView removes indentation, while the style applied to StyledTreeItem removes any space designated for an icon.

Check out this sandbox featuring the TreeView design

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