@wordpress/components/build-module/placeholder/index.js

UI components for WordPress.

import _extends from "@babel/runtime/helpers/esm/extends";
import { createElement } from "@wordpress/element";

/**
 * External dependencies
 */
import classnames from 'classnames';
/**
 * WordPress dependencies
 */

import { useResizeObserver } from '@wordpress/compose';
import { SVG, Path } from '@wordpress/primitives';
/**
 * Internal dependencies
 */

import Icon from '../icon';
const PlaceholderIllustration = createElement(SVG, {
  className: "components-placeholder__illustration",
  fill: "none",
  xmlns: "http://www.w3.org/2000/svg",
  viewBox: "0 0 60 60",
  preserveAspectRatio: "none"
}, createElement(Path, {
  vectorEffect: "non-scaling-stroke",
  d: "M60 60 0 0"
}));
/**
 * Renders a placeholder. Normally used by blocks to render their empty state.
 *
 * ```jsx
 * import { Placeholder } from '@wordpress/components';
 * import { more } from '@wordpress/icons';
 *
 * const MyPlaceholder = () => <Placeholder icon={ more } label="Placeholder" />;
 * ```
 */

export function Placeholder(props) {
  const {
    icon,
    children,
    label,
    instructions,
    className,
    notices,
    preview,
    isColumnLayout,
    withIllustration,
    ...additionalProps
  } = props;
  const [resizeListener, {
    width
  }] = useResizeObserver(); // Since `useResizeObserver` will report a width of `null` until after the
  // first render, avoid applying any modifier classes until width is known.

  let modifierClassNames;

  if (typeof width === 'number') {
    modifierClassNames = {
      'is-large': width >= 480,
      'is-medium': width >= 160 && width < 480,
      'is-small': width < 160
    };
  }

  const classes = classnames('components-placeholder', className, modifierClassNames, withIllustration ? 'has-illustration' : null);
  const fieldsetClasses = classnames('components-placeholder__fieldset', {
    'is-column-layout': isColumnLayout
  });
  return createElement("div", _extends({}, additionalProps, {
    className: classes
  }), withIllustration ? PlaceholderIllustration : null, resizeListener, notices, preview && createElement("div", {
    className: "components-placeholder__preview"
  }, preview), createElement("div", {
    className: "components-placeholder__label"
  }, createElement(Icon, {
    icon: icon
  }), label), createElement("fieldset", {
    className: fieldsetClasses
  }, !!instructions && createElement("legend", {
    className: "components-placeholder__instructions"
  }, instructions), children));
}
export default Placeholder;
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