Enable Copy Paste for expansion-panels

Question

I am trying to use the ExpansionPanel component from Material-UI, but I am trying to figure out how to enable selecting text on the ExpansionPanelSummary so that the user can Copy/Paste text within the summary.

Answer 1

ExpansionPanelSummary leverages ButtonBase as its root component. This means it is treating the entire summary like a button to control the expand/collapse.

The CSS in ButtonBase specifies userSelect: 'none' which disables selecting text in the element.

The example below shows one way of overriding this:

import React from "react";
import { makeStyles } from "@material-ui/core/styles";
import ExpansionPanel from "@material-ui/core/ExpansionPanel";
import ExpansionPanelSummary from "@material-ui/core/ExpansionPanelSummary";
import ExpansionPanelDetails from "@material-ui/core/ExpansionPanelDetails";
import Typography from "@material-ui/core/Typography";
import ExpandMoreIcon from "@material-ui/icons/ExpandMore";

const useStyles = makeStyles(theme => ({
  root: {
    width: "100%",
    "& .MuiExpansionPanelSummary-root": {
      userSelect: "auto"
    }
  },
  heading: {
    fontSize: theme.typography.pxToRem(15),
    fontWeight: theme.typography.fontWeightRegular
  }
}));

export default function SimpleExpansionPanel() {
  const classes = useStyles();

  return (
    <div className={classes.root}>
      <ExpansionPanel>
        <ExpansionPanelSummary
          expandIcon={<ExpandMoreIcon />}
          aria-controls="panel1a-content"
          id="panel1a-header"
        >
          <Typography className={classes.heading}>Expansion Panel 1</Typography>
        </ExpansionPanelSummary>
        <ExpansionPanelDetails>
          <Typography>
            Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse
            malesuada lacus ex, sit amet blandit leo lobortis eget.
          </Typography>
        </ExpansionPanelDetails>
      </ExpansionPanel>
      <ExpansionPanel>
        <ExpansionPanelSummary
          expandIcon={<ExpandMoreIcon />}
          aria-controls="panel2a-content"
          id="panel2a-header"
        >
          <Typography className={classes.heading}>Expansion Panel 2</Typography>
        </ExpansionPanelSummary>
        <ExpansionPanelDetails>
          <Typography>
            Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse
            malesuada lacus ex, sit amet blandit leo lobortis eget.
          </Typography>
        </ExpansionPanelDetails>
      </ExpansionPanel>
      <ExpansionPanel disabled>
        <ExpansionPanelSummary
          expandIcon={<ExpandMoreIcon />}
          aria-controls="panel3a-content"
          id="panel3a-header"
        >
          <Typography className={classes.heading}>
            Disabled Expansion Panel
          </Typography>
        </ExpansionPanelSummary>
      </ExpansionPanel>
    </div>
  );
}

Relevant documentation:

• https://developer.mozilla.org/en-US/docs/Web/CSS/user-select