react-responsive-picture/es/components/Picture.js

A future-proof responsive image component that supports latest Picture specification

function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }

import * as React from "react";
import canUseDom from "can-use-dom";

var Picture =
/*#__PURE__*/
function (_React$PureComponent) {
  _inheritsLoose(Picture, _React$PureComponent);

  function Picture() {
    return _React$PureComponent.apply(this, arguments) || this;
  }

  var _proto = Picture.prototype;

  _proto.componentDidMount = function componentDidMount() {
    // c.f. https://github.com/scottjehl/picturefill/pull/556
    var picturefill;

    try {
      picturefill = require("picturefill"); // eslint-disable-line global-require
    } catch (x) {
      return;
    }

    if (picturefill) {
      picturefill(); // browser
    } // else node

  };

  _proto.renderSources = function renderSources() {
    var ieVersion = canUseDom && document["documentMode"] ? document["documentMode"] : -1;
    var sources = this.props.sources;

    if (sources == null) {
      return null;
    }

    var mappedSources = sources.map(function (source, index) {
      if (source.srcSet == null) {
        return null;
      }

      return React.createElement("source", {
        key: "sources-" + index,
        srcSet: source.srcSet,
        media: source.media,
        type: source.type
      });
    }); // IE9 requires the sources to be wrapped around an <audio> tag.

    if (ieVersion === 9) {
      return React.createElement("video", {
        style: {
          display: "none"
        }
      }, mappedSources);
    }

    return mappedSources;
  };

  _proto.renderImage = function renderImage(props, skipSizes) {
    if (skipSizes === void 0) {
      skipSizes = false;
    }

    var _props$alt = props.alt,
        alt = _props$alt === void 0 ? "" : _props$alt,
        _props$src = props.src,
        src = _props$src === void 0 ? "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" : _props$src,
        sizes = props.sizes,
        rest = _objectWithoutPropertiesLoose(props, ["alt", "src", "sizes"]); // Adds sizes props if sources isn't defined


    var sizesProp = skipSizes ? null : {
      sizes: sizes
    };
    return React.createElement("img", _extends({
      alt: alt,
      srcSet: src
    }, sizesProp, rest));
  };

  _proto.render = function render() {
    var _this$props = this.props,
        sources = _this$props.sources,
        rest = _objectWithoutPropertiesLoose(_this$props, ["sources"]);

    if (sources != null) {
      return React.createElement("picture", null, this.renderSources(), this.renderImage(rest, true));
    }

    return this.renderImage(rest);
  };

  return Picture;
}(React.PureComponent);

export default Picture;