How can I dynamically display Material-UI's <MenuItem/> within a <DropDownMenu/> using ReactJS?

Question

How can I dynamically display Material-UI's <MenuItem/> within a <DropDownMenu/> using ReactJS?

In my ReactJS + Material-UI project, I am working with an array named colors that contains different color strings such as "white", "blue", and "green. My goal is to render each color string as a <MenuItem/> within a <DropDownMenu/> component (http://www.material-ui.com/#/components/dropdown-menu). When a user selects a color from the dropdown menu, I want to log that specific color to the console (e.g., if "white" is chosen, then console.log("white")).

I tried using .forEach method but the dropdown menu does not display any strings and remains empty. What could be causing this issue?

Here is an excerpt of the code:

  constructor() {
    super()

    this.state = {
      value: 1,
    }
  }

  dropDownColorChange(event, index, value) {
    this.setState({value: value})
    //I need help on dynamically implementing this section based on array size. The goal is to console.log the color string of the selected item
  }

  render() {
    var colors = ["white", "blue", "green"]; //able to accommodate arrays of any size


    return (
             <div>
               <DropDownMenu
                value={this.state.valueTwo}
                onChange={this.dropDownColorChange}
              >
                {
                    <MenuItem value={1} primaryText="Select" />
                  colors.forEach(color => {
                    <MenuItem primaryText={color}/>
                  })
                }
              </DropDownMenu>
             </div>
    )
  }

Thank you for your assistance.

javascript css reactjs material-ui

Answer 1

Answer №1

You're almost there! Make sure to utilize the map function to loop through available colors and create a MenuItem for each color:

const colors = ['white', 'blue', 'green'];

class ColorChanger extends Component {
  constructor() {
    super();

    this.state = {
      selectedColorValue: 1,
    };
  }

  handleColorChange(event, index, value) {
    console.log(`You have selected ${colors[value]} color`);

    this.setState({
      selectedColorValue: value
    });
  }

  render() {
    return (
      <div>
        <DropDownMenu value={this.state.selectedColorValue} onChange={this.handleColorChange}>
          {colors.map((color, index) =>
            <MenuItem key={index} value={index} primaryText={color} />
          )}
        </DropDownMenu>
      </div>
    );
  }
}

map (as opposed to forEach) creates an array with elements returned by the provided function. In your scenario, it returns a <MenuItem />.

Answer 2

You're almost there! Make sure to utilize the map function to loop through available colors and create a MenuItem for each color:

const colors = ['white', 'blue', 'green'];

class ColorChanger extends Component {
  constructor() {
    super();

    this.state = {
      selectedColorValue: 1,
    };
  }

  handleColorChange(event, index, value) {
    console.log(`You have selected ${colors[value]} color`);

    this.setState({
      selectedColorValue: value
    });
  }

  render() {
    return (
      <div>
        <DropDownMenu value={this.state.selectedColorValue} onChange={this.handleColorChange}>
          {colors.map((color, index) =>
            <MenuItem key={index} value={index} primaryText={color} />
          )}
        </DropDownMenu>
      </div>
    );
  }
}

map (as opposed to forEach) creates an array with elements returned by the provided function. In your scenario, it returns a <MenuItem />.

Answer 3

Answer №2

Implementing the react hook allowed me to dynamically set the menu items when the menu icon is clicked, as well as passing a specific value to my action method.

const [menuItems, setMenuItems] = React.useState<IMenuItem[]>();
const [menuValue, setMenuValue] = React.useState<IMenuValue>();

const handleClickMenu = (
    event: React.MouseEvent<HTMLElement>,
    value: IMenuValue,
  ) => {
    setMenuItems(value.menuItems);
    setMenuTransaction(value);

    setMenuAnchorEl(event.currentTarget);
  };


return (

// ... modified code ...
<PositionedVertMenu
 data-testid={`menu`}
 open={Boolean(menuAnchorEl)}
 anchorEl={menuAnchorEl}
 onClick={(event: React.MouseEvent<HTMLElement>) => handleClickMenu(event, value)}
 onClose={handleCloseMenu}
>
  {menuValue &&
   menuItems?.map((option, menuIndex) => (
    <MenuItem
     data-testid={`menu-item-${menuIndex}`}
     onClick={() => option.action(menuValue, handleCloseMenu)}
    >
     <Typography>{translate(option.text)}</Typography>
    </MenuItem>
   ))}
 </PositionedVertMenu>
)

Answer 4

Implementing the react hook allowed me to dynamically set the menu items when the menu icon is clicked, as well as passing a specific value to my action method.

const [menuItems, setMenuItems] = React.useState<IMenuItem[]>();
const [menuValue, setMenuValue] = React.useState<IMenuValue>();

const handleClickMenu = (
    event: React.MouseEvent<HTMLElement>,
    value: IMenuValue,
  ) => {
    setMenuItems(value.menuItems);
    setMenuTransaction(value);

    setMenuAnchorEl(event.currentTarget);
  };


return (

// ... modified code ...
<PositionedVertMenu
 data-testid={`menu`}
 open={Boolean(menuAnchorEl)}
 anchorEl={menuAnchorEl}
 onClick={(event: React.MouseEvent<HTMLElement>) => handleClickMenu(event, value)}
 onClose={handleCloseMenu}
>
  {menuValue &&
   menuItems?.map((option, menuIndex) => (
    <MenuItem
     data-testid={`menu-item-${menuIndex}`}
     onClick={() => option.action(menuValue, handleCloseMenu)}
    >
     <Typography>{translate(option.text)}</Typography>
    </MenuItem>
   ))}
 </PositionedVertMenu>
)

How can I dynamically display Material-UI's <MenuItem/> within a <DropDownMenu/> using ReactJS?

Answer №1

Answer №2

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