Board

Responsive
Rows & Columns
Breakpoints

Note	Commercial feature A commercial Vaadin subscription is required to use Board in your project. Start Free Trial See Pricing

Board is a powerful and easy to use layout element for building responsive views. It reorders the components inside it on different screen sizes while maximising the use of available space.

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Source code

BoardBasic.javaBoard board = new Board();
board.addRow(
        new ExampleIndicator("Current users", "745", "+33.7"),
        new ExampleIndicator("View events", "54.6k", "-112.45"),
        new ExampleIndicator("Conversion rate", "18%", "+3.9"),
        new ExampleIndicator("Custom metric", "-123.45")
);
board.addRow(new ExampleChart());
BoardBasic.javapackage com.vaadin.demo.component.board;

import com.vaadin.flow.component.board.Board;
import com.vaadin.flow.component.html.Div;
import com.vaadin.flow.router.Route;

@Route("board-basic")
public class BoardBasic extends Div {

  public BoardBasic() {
    // tag::snippet[]
    Board board = new Board();
    board.addRow(
            new ExampleIndicator("Current users", "745", "+33.7"),
            new ExampleIndicator("View events", "54.6k", "-112.45"),
            new ExampleIndicator("Conversion rate", "18%", "+3.9"),
            new ExampleIndicator("Custom metric", "-123.45")
    );
    board.addRow(new ExampleChart());
    // end::snippet[]

    add(board);
    addClassName("basic-board");
  }

}

Use Board to create responsive views and dashboards that work on any screen size.

Responsive

Board is responsive by default meaning it doesn’t require any custom development. Its layout is automatically optimized and adjusted based on the screen size, ensuring the components utilise all available space.

Rows & Columns

Board is made up of rows. Each row supports up to four columns and can contain up to four components.

Nested Rows

Rows can be nested for more fine grained control of how certain areas of the layout behave on resize and how they are rendered.

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Source code

BoardNested.javaRow rootRow = new Row();
rootRow.add(new ExampleStatistics(), 2);

Row nestedRow = new Row(
        new ExampleIndicator("Current users", "745", "+33.7"),
        new ExampleIndicator("Conversion rate", "18%", "+3.9")
);
rootRow.addNestedRow(nestedRow);

Board board = new Board();
board.add(rootRow);
BoardNested.javapackage com.vaadin.demo.component.board;

import com.vaadin.flow.component.board.Board;
import com.vaadin.flow.component.board.Row;
import com.vaadin.flow.component.html.Div;
import com.vaadin.flow.router.Route;

@Route("board-nested")
public class BoardNested extends Div {
    public BoardNested() {
        // tag::snippet[]
        Row rootRow = new Row();
        rootRow.add(new ExampleStatistics(), 2);

        Row nestedRow = new Row(
                new ExampleIndicator("Current users", "745", "+33.7"),
                new ExampleIndicator("Conversion rate", "18%", "+3.9")
        );
        rootRow.addNestedRow(nestedRow);

        Board board = new Board();
        board.add(rootRow);
        // end::snippet[]

        add(board);
        this.setClassName("board-nested");
    }

}

Column Wrapping

Columns automatically wrap onto new lines as the viewport narrows. The wrapping behaviour for a row with four columns and four components is shown below.

Important

Use the draggable split handle to resize the layout and see how the columns wrap.

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Source code

BoardColumnWrapping.javaBoard board = new Board();
board.addRow(
        createCell("Cell 1"),
        createCell("Cell 2"),
        createCell("Cell 3"),
        createCell("Cell 4")
);

SplitLayout splitLayout = new SplitLayout(board, new Div());
BoardColumnWrapping.javapackage com.vaadin.demo.component.board;

import com.vaadin.flow.component.board.Board;
import com.vaadin.flow.component.html.Div;
import com.vaadin.flow.component.splitlayout.SplitLayout;
import com.vaadin.flow.router.Route;

@Route("board-column-wrapping")
public class BoardColumnWrapping extends Div {

    public BoardColumnWrapping() {
        // tag::snippet[]
        Board board = new Board();
        board.addRow(
                createCell("Cell 1"),
                createCell("Cell 2"),
                createCell("Cell 3"),
                createCell("Cell 4")
        );

        SplitLayout splitLayout = new SplitLayout(board, new Div());
        // end::snippet[]

        addClassName("board-column-wrapping");
        add(splitLayout);
    }

    private static Div createCell(String text) {
        Div div = new Div();
        div.setText(text);
        div.addClassNames("cell", "color");

        return div;
    }

}

Column Span

By default, components in a row shares the space equally. A component can stretch across two or three columns by setting its column span.

The possible combinations are shown below:

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Source code

BoardColumnSpan.javaBoard board1 = createBoard1();
Board board2 = createBoard2();
Board board3 = createBoard3();

...

private static Board createBoard1() {
    Row row1 = new Row();
    row1.add(createCell("Span 2"), 2);
    row1.add(createCell("Span 1"));
    row1.add(createCell("Span 1"));

    Row row2 = new Row();
    row2.add(createCell("Span 1"));
    row2.add(createCell("Span 2"), 2);
    row2.add(createCell("Span 1"));

    Row row3 = new Row();
    row3.add(createCell("Span 1"));
    row3.add(createCell("Span 1"));
    row3.add(createCell("Span 2"), 2);

    Board board = new Board();
    board.add(row1, row2, row3);

    return board;
}

private static Board createBoard2() {
    Row row1 = new Row();
    row1.add(createCell("Span 3"), 3);
    row1.add(createCell("Span 1"));

    Row row2 = new Row();
    row2.add(createCell("Span 1"));
    row2.add(createCell("Span 3"), 3);

    Board board = new Board();
    board.add(row1, row2);

    return board;
}

private static Board createBoard3() {
    Row row1 = new Row();
    row1.add(createCell("Span 2"), 2);
    row1.add(createCell("Span 1"));

    Row row2 = new Row();
    row2.add(createCell("Span 1"));
    row2.add(createCell("Span 2"), 2);

    Board board = new Board();
    board.add(row1, row2);

    return board;
}
BoardColumnSpan.javapackage com.vaadin.demo.component.board;

import com.vaadin.flow.component.board.Board;
import com.vaadin.flow.component.board.Row;
import com.vaadin.flow.component.html.Div;
import com.vaadin.flow.router.Route;

@Route("board-column-span")
public class BoardColumnSpan extends Div {

    public BoardColumnSpan() {
        // tag::snippet[]
        Board board1 = createBoard1();
        Board board2 = createBoard2();
        Board board3 = createBoard3();
        // end::snippet[]

        addClassName("board-column-span");
        add(board1, board2, board3);
    }

    private static Board createBoard1() {
        Row row1 = new Row();
        row1.add(createCell("Span 2"), 2);
        row1.add(createCell("Span 1"));
        row1.add(createCell("Span 1"));

        Row row2 = new Row();
        row2.add(createCell("Span 1"));
        row2.add(createCell("Span 2"), 2);
        row2.add(createCell("Span 1"));

        Row row3 = new Row();
        row3.add(createCell("Span 1"));
        row3.add(createCell("Span 1"));
        row3.add(createCell("Span 2"), 2);

        Board board = new Board();
        board.add(row1, row2, row3);

        return board;
    }

    private static Board createBoard2() {
        Row row1 = new Row();
        row1.add(createCell("Span 3"), 3);
        row1.add(createCell("Span 1"));

        Row row2 = new Row();
        row2.add(createCell("Span 1"));
        row2.add(createCell("Span 3"), 3);

        Board board = new Board();
        board.add(row1, row2);

        return board;
    }

    private static Board createBoard3() {
        Row row1 = new Row();
        row1.add(createCell("Span 2"), 2);
        row1.add(createCell("Span 1"));

        Row row2 = new Row();
        row2.add(createCell("Span 1"));
        row2.add(createCell("Span 2"), 2);

        Board board = new Board();
        board.add(row1, row2);

        return board;
    }

    private static Div createCell(String text) {
        Div div = new Div();
        div.setText(text);
        div.addClassNames("cell");

        return div;
    }

}

Breakpoints

Board adjusts its layout based on the viewport width. The following three viewport widths, called breakpoints, trigger a layout change:

Breakpoint	Viewport width	Max number of columns
large	≥ 960 pixels	4
medium	600–959 pixels	2 or 3^[1]
small	< 600 pixels	1

Breakpoint

Viewport width

Max number of columns

large

≥ 960 pixels

medium

600–959 pixels

2 or 3^[1]

small

< 600 pixels

The breakpoints can be customized by overriding the CSS custom properties named --vaadin-board-width-small and --vaadin-board-width-medium.

Breakpoint-Specific Styling

You can apply different styles for each breakpoint, for example to change the font size and space between components.

Important

Use the draggable split handle to resize the layout and see how the board styling changes on different breakpoints.

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Source code

BoardBreakpoints.javaBoard board = new Board();

// styles are defined separately, check the board.css snippet
board.addRow(
        createCell("Cell 1"),
        createCell("Cell 2"),
        createCell("Cell 3"),
        createCell("Cell 4")
);

SplitLayout splitLayout = new SplitLayout(board, new Div());
BoardBreakpoints.javapackage com.vaadin.demo.component.board;

import com.vaadin.flow.component.board.Board;
import com.vaadin.flow.component.html.Div;
import com.vaadin.flow.component.splitlayout.SplitLayout;
import com.vaadin.flow.router.Route;

@Route("board-breakpoints")
public class BoardBreakpoints extends Div {
    public BoardBreakpoints() {
        // tag::snippet[]
        Board board = new Board();

        // styles are defined separately, check the board.css snippet
        board.addRow(
                createCell("Cell 1"),
                createCell("Cell 2"),
                createCell("Cell 3"),
                createCell("Cell 4")
        );

        SplitLayout splitLayout = new SplitLayout(board, new Div());
        // end::snippet[]

        addClassName("board-breakpoints");
        add(splitLayout);
    }

    private Div createCell(String text) {
        Div div = new Div();
        div.setText(text);
        div.addClassNames("cell");
        return div;
    }

}
board.css/* should be added to frontend/theme/[my-theme]/styles.css */
vaadin-board-row.large > .cell {
    background: var(--lumo-success-color-10pct);
    color: var(--lumo-success-color);
}

vaadin-board-row.medium > .cell {
    background: var(--lumo-primary-color-10pct);
    color: var(--lumo-primary-color);
}

vaadin-board-row.small > .cell {
    background: var(--lumo-error-color-10pct);
    color: var(--lumo-error-color);
}
board.css/****************************
 * board basic
 ****************************/
.basic-board,
:host(.basic-board) {
    --board-border: 1px solid var(--lumo-contrast-10pct);
    --vaadin-board-width-small: 200px;
    --vaadin-board-width-medium: 400px;
}

.basic-board vaadin-board-row:not(:last-child),
:host(.basic-board) vaadin-board-row:not(:last-child) {
    border-block-end: var(--board-border);
}

.basic-board example-indicator,
:host(.basic-board) example-indicator {
    padding: var(--lumo-space-m);
}

.basic-board example-indicator:not(:nth-child(2n)),
:host(.basic-board) example-indicator:not(:nth-child(2n)) {
    border-inline-end: var(--board-border);
}

@media (min-width: 1024px) {
    .basic-board,
    :host(.basic-board) {
        --vaadin-board-width-small: 300px;
        --vaadin-board-width-medium: 400px;
    }

    .basic-board example-indicator:not(:last-child),
    :host(.basic-board) example-indicator:not(:last-child) {
        border-inline-end: var(--board-border);
    }
}

/****************************
 * board nested
 ****************************/
.board-nested,
:host(.board-nested) {
    --board-border: 1px solid var(--lumo-contrast-10pct);
    --vaadin-board-width-small: 150px;
    --vaadin-board-width-medium: 220px;
}

.board-nested example-statistics,
:host(.board-nested) example-statistics {
    padding-inline-end: var(--lumo-space-m);
    border-inline-end: var(--board-border);
}

.board-nested example-indicator,
:host(.board-nested) example-indicator {
    padding: var(--lumo-space-s);
}

.board-nested example-indicator:first-child,
:host(.board-nested) example-indicator:first-child {
    border-block-end: var(--board-border);
}

@media (min-width: 1024px) {
    .board-nested example-indicator,
    :host(.board-nested) example-indicator {
        padding: var(--lumo-space-m);
    }

    .board-nested,
    :host(.board-nested) {
        --vaadin-board-width-small: 300px;
        --vaadin-board-width-medium: 400px;
    }
}

/****************************
 * board-column-wrapping
 ****************************/
.board-column-wrapping,
:host(.board-column-wrapping) {
    --vaadin-board-width-small: 150px;
    --vaadin-board-width-medium: 220px;
    --board-blue-10: #0090c0;
    --board-blue-20: #006c90;
    --board-blue-30: #00506b;
    --board-blue-40: #003e53;
}

@media (min-width: 1024px) {
    .board-column-wrapping,
    :host(.board-column-wrapping) {
        --vaadin-board-width-small: 300px;
        --vaadin-board-width-medium: 400px;
    }
}

.board-column-wrapping .cell,
:host(.board-column-wrapping) .cell {
    padding: 1em 0.3em;
    text-align: center;
    color: white;
    white-space: nowrap;
}

@media (min-width: 1024px) {
    .board-column-wrapping .cell,
    :host(.board-column-wrapping) .cell {
        padding: 1em;
    }
}

.board-column-wrapping .color:nth-child(1),
:host(.board-column-wrapping) .color:nth-child(1) {
    background: var(--board-blue-40);
}

.board-column-wrapping .color:nth-child(2),
:host(.board-column-wrapping) .color:nth-child(2) {
    background: var(--board-blue-30);
}

.board-column-wrapping .color:nth-child(3),
:host(.board-column-wrapping) .color:nth-child(3) {
    background: var(--board-blue-20);
}

.board-column-wrapping .color:nth-child(4),
:host(.board-column-wrapping) .color:nth-child(4) {
    background: var(--board-blue-10);
}

/****************************
 * board-column-span
 ****************************/
.board-column-span,
:host(.board-column-span) {
    --vaadin-board-width-small: 150px;
    --vaadin-board-width-medium: 220px;
    --board-blue-10: #0090c0;
    --board-blue-20: #006c90;
    --board-blue-30: #00506b;
    --board-blue-40: #003e53;
    --board-inner-border: 1px dashed white;
}

@media (min-width: 1024px) {
    .board-column-span,
    :host(.board-column-span) {
        --vaadin-board-width-small: 300px;
        --vaadin-board-width-medium: 400px;
    }
}

.board-column-span vaadin-board,
:host(.board-column-span) vaadin-board {
    padding: var(--lumo-space-m) 0;
}

.board-column-span .cell,
:host(.board-column-span) .cell {
    padding: 1em 0.3em;
    text-align: center;
    color: white;
    white-space: nowrap;

    background: var(--board-blue-20);
}

@media (min-width: 1024px) {
    .board-column-span .cell,
    :host(.board-column-span) .cell {
        padding: 1em;
    }
}

.board-column-span .color:nth-child(1),
:host(.board-column-span) .color:nth-child(1) {
    background: var(--board-blue-40);
}

.board-column-span .color:nth-child(2),
:host(.board-column-span) .color:nth-child(2) {
    background: var(--board-blue-30);
}

.board-column-span .color:nth-child(3),
:host(.board-column-span) .color:nth-child(3) {
    background: var(--board-blue-20);
}

.board-column-span .color:nth-child(4),
:host(.board-column-span) .color:nth-child(4) {
    background: var(--board-blue-10);
}

.board-column-span .cell[board-cols='3'],
:host(.board-column-span) .cell[board-cols='3'] {
    background: var(--board-blue-40);
}

.board-column-span .cell[board-cols='2'],
:host(.board-column-span) .cell[board-cols='2'] {
    background: var(--board-blue-30);
}

.board-column-span .cell:not(:last-child),
:host(.board-column-span) .cell:not(:last-child) {
    border-inline-end: var(--board-inner-border);
}

.board-column-span vaadin-board-row:not(:last-child) .cell,
:host(.board-column-span) vaadin-board-row:not(:last-child) .cell {
    border-block-end: var(--board-inner-border);
}

/****************************
 * board-breakpoints
 ****************************/
.board-breakpoints,
:host(.board-breakpoints) {
    --vaadin-board-width-small: 150px;
    --vaadin-board-width-medium: 220px;
}

@media (min-width: 1024px) {
    .board-breakpoints,
    :host(.board-breakpoints) {
        --vaadin-board-width-small: 300px;
        --vaadin-board-width-medium: 400px;
    }
}

.board-breakpoints vaadin-board-row.large > .cell,
:host(.board-breakpoints)
    /* tag::breakpoint[] */
/* should be added to frontend/theme/[my-theme]/styles.css */
vaadin-board-row.large > .cell {
    background: var(--lumo-success-color-10pct);
    color: var(--lumo-success-color);
}

/* end::breakpoint[] */

.board-breakpoints vaadin-board-row.medium > .cell,
:host(.board-breakpoints)
    /* tag::breakpoint[] */
vaadin-board-row.medium > .cell {
    background: var(--lumo-primary-color-10pct);
    color: var(--lumo-primary-color);
}

/* end::breakpoint[] */

.board-breakpoints vaadin-board-row.small > .cell,
:host(.board-breakpoints)
    /* tag::breakpoint[] */
vaadin-board-row.small > .cell {
    background: var(--lumo-error-color-10pct);
    color: var(--lumo-error-color);
}

/* end::breakpoint[] */

.board-breakpoints .cell,
:host(.board-breakpoints) .cell {
    padding: 1em 0.3em;
    text-align: center;
    color: white;
    white-space: nowrap;
}

@media (min-width: 1024px) {
    .board-breakpoints .cell,
    :host(.board-breakpoints) .cell {
        padding: 1em;
    }
}

45A8A464-023A-4ED8-B10D-326C852350DD

1. A row with three equal-width components won’t wrap until the small breakpoint.

Docs

Docs

Board

Responsive

Rows & Columns

Nested Rows

Column Wrapping

Column Span

Breakpoints

Breakpoint-Specific Styling