Files
30-seconds-of-code/node_modules/react-helmet/lib/HelmetUtils.js
2019-08-20 15:52:05 +02:00

536 lines
22 KiB
JavaScript

exports.__esModule = true;
exports.warn = exports.requestAnimationFrame = exports.reducePropsToState = exports.mapStateOnServer = exports.handleClientStateChange = exports.convertReactPropstoHtmlAttributes = undefined;
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
var _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; };
var _react = require("react");
var _react2 = _interopRequireDefault(_react);
var _objectAssign = require("object-assign");
var _objectAssign2 = _interopRequireDefault(_objectAssign);
var _HelmetConstants = require("./HelmetConstants.js");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var encodeSpecialCharacters = function encodeSpecialCharacters(str) {
var encode = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
if (encode === false) {
return String(str);
}
return String(str).replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/"/g, "&quot;").replace(/'/g, "&#x27;");
};
var getTitleFromPropsList = function getTitleFromPropsList(propsList) {
var innermostTitle = getInnermostProperty(propsList, _HelmetConstants.TAG_NAMES.TITLE);
var innermostTemplate = getInnermostProperty(propsList, _HelmetConstants.HELMET_PROPS.TITLE_TEMPLATE);
if (innermostTemplate && innermostTitle) {
// use function arg to avoid need to escape $ characters
return innermostTemplate.replace(/%s/g, function () {
return innermostTitle;
});
}
var innermostDefaultTitle = getInnermostProperty(propsList, _HelmetConstants.HELMET_PROPS.DEFAULT_TITLE);
return innermostTitle || innermostDefaultTitle || undefined;
};
var getOnChangeClientState = function getOnChangeClientState(propsList) {
return getInnermostProperty(propsList, _HelmetConstants.HELMET_PROPS.ON_CHANGE_CLIENT_STATE) || function () {};
};
var getAttributesFromPropsList = function getAttributesFromPropsList(tagType, propsList) {
return propsList.filter(function (props) {
return typeof props[tagType] !== "undefined";
}).map(function (props) {
return props[tagType];
}).reduce(function (tagAttrs, current) {
return _extends({}, tagAttrs, current);
}, {});
};
var getBaseTagFromPropsList = function getBaseTagFromPropsList(primaryAttributes, propsList) {
return propsList.filter(function (props) {
return typeof props[_HelmetConstants.TAG_NAMES.BASE] !== "undefined";
}).map(function (props) {
return props[_HelmetConstants.TAG_NAMES.BASE];
}).reverse().reduce(function (innermostBaseTag, tag) {
if (!innermostBaseTag.length) {
var keys = Object.keys(tag);
for (var i = 0; i < keys.length; i++) {
var attributeKey = keys[i];
var lowerCaseAttributeKey = attributeKey.toLowerCase();
if (primaryAttributes.indexOf(lowerCaseAttributeKey) !== -1 && tag[lowerCaseAttributeKey]) {
return innermostBaseTag.concat(tag);
}
}
}
return innermostBaseTag;
}, []);
};
var getTagsFromPropsList = function getTagsFromPropsList(tagName, primaryAttributes, propsList) {
// Calculate list of tags, giving priority innermost component (end of the propslist)
var approvedSeenTags = {};
return propsList.filter(function (props) {
if (Array.isArray(props[tagName])) {
return true;
}
if (typeof props[tagName] !== "undefined") {
warn("Helmet: " + tagName + " should be of type \"Array\". Instead found type \"" + _typeof(props[tagName]) + "\"");
}
return false;
}).map(function (props) {
return props[tagName];
}).reverse().reduce(function (approvedTags, instanceTags) {
var instanceSeenTags = {};
instanceTags.filter(function (tag) {
var primaryAttributeKey = void 0;
var keys = Object.keys(tag);
for (var i = 0; i < keys.length; i++) {
var attributeKey = keys[i];
var lowerCaseAttributeKey = attributeKey.toLowerCase();
// Special rule with link tags, since rel and href are both primary tags, rel takes priority
if (primaryAttributes.indexOf(lowerCaseAttributeKey) !== -1 && !(primaryAttributeKey === _HelmetConstants.TAG_PROPERTIES.REL && tag[primaryAttributeKey].toLowerCase() === "canonical") && !(lowerCaseAttributeKey === _HelmetConstants.TAG_PROPERTIES.REL && tag[lowerCaseAttributeKey].toLowerCase() === "stylesheet")) {
primaryAttributeKey = lowerCaseAttributeKey;
}
// Special case for innerHTML which doesn't work lowercased
if (primaryAttributes.indexOf(attributeKey) !== -1 && (attributeKey === _HelmetConstants.TAG_PROPERTIES.INNER_HTML || attributeKey === _HelmetConstants.TAG_PROPERTIES.CSS_TEXT || attributeKey === _HelmetConstants.TAG_PROPERTIES.ITEM_PROP)) {
primaryAttributeKey = attributeKey;
}
}
if (!primaryAttributeKey || !tag[primaryAttributeKey]) {
return false;
}
var value = tag[primaryAttributeKey].toLowerCase();
if (!approvedSeenTags[primaryAttributeKey]) {
approvedSeenTags[primaryAttributeKey] = {};
}
if (!instanceSeenTags[primaryAttributeKey]) {
instanceSeenTags[primaryAttributeKey] = {};
}
if (!approvedSeenTags[primaryAttributeKey][value]) {
instanceSeenTags[primaryAttributeKey][value] = true;
return true;
}
return false;
}).reverse().forEach(function (tag) {
return approvedTags.push(tag);
});
// Update seen tags with tags from this instance
var keys = Object.keys(instanceSeenTags);
for (var i = 0; i < keys.length; i++) {
var attributeKey = keys[i];
var tagUnion = (0, _objectAssign2.default)({}, approvedSeenTags[attributeKey], instanceSeenTags[attributeKey]);
approvedSeenTags[attributeKey] = tagUnion;
}
return approvedTags;
}, []).reverse();
};
var getInnermostProperty = function getInnermostProperty(propsList, property) {
for (var i = propsList.length - 1; i >= 0; i--) {
var props = propsList[i];
if (props.hasOwnProperty(property)) {
return props[property];
}
}
return null;
};
var reducePropsToState = function reducePropsToState(propsList) {
return {
baseTag: getBaseTagFromPropsList([_HelmetConstants.TAG_PROPERTIES.HREF], propsList),
bodyAttributes: getAttributesFromPropsList(_HelmetConstants.ATTRIBUTE_NAMES.BODY, propsList),
defer: getInnermostProperty(propsList, _HelmetConstants.HELMET_PROPS.DEFER),
encode: getInnermostProperty(propsList, _HelmetConstants.HELMET_PROPS.ENCODE_SPECIAL_CHARACTERS),
htmlAttributes: getAttributesFromPropsList(_HelmetConstants.ATTRIBUTE_NAMES.HTML, propsList),
linkTags: getTagsFromPropsList(_HelmetConstants.TAG_NAMES.LINK, [_HelmetConstants.TAG_PROPERTIES.REL, _HelmetConstants.TAG_PROPERTIES.HREF], propsList),
metaTags: getTagsFromPropsList(_HelmetConstants.TAG_NAMES.META, [_HelmetConstants.TAG_PROPERTIES.NAME, _HelmetConstants.TAG_PROPERTIES.CHARSET, _HelmetConstants.TAG_PROPERTIES.HTTPEQUIV, _HelmetConstants.TAG_PROPERTIES.PROPERTY, _HelmetConstants.TAG_PROPERTIES.ITEM_PROP], propsList),
noscriptTags: getTagsFromPropsList(_HelmetConstants.TAG_NAMES.NOSCRIPT, [_HelmetConstants.TAG_PROPERTIES.INNER_HTML], propsList),
onChangeClientState: getOnChangeClientState(propsList),
scriptTags: getTagsFromPropsList(_HelmetConstants.TAG_NAMES.SCRIPT, [_HelmetConstants.TAG_PROPERTIES.SRC, _HelmetConstants.TAG_PROPERTIES.INNER_HTML], propsList),
styleTags: getTagsFromPropsList(_HelmetConstants.TAG_NAMES.STYLE, [_HelmetConstants.TAG_PROPERTIES.CSS_TEXT], propsList),
title: getTitleFromPropsList(propsList),
titleAttributes: getAttributesFromPropsList(_HelmetConstants.ATTRIBUTE_NAMES.TITLE, propsList)
};
};
var rafPolyfill = function () {
var clock = Date.now();
return function (callback) {
var currentTime = Date.now();
if (currentTime - clock > 16) {
clock = currentTime;
callback(currentTime);
} else {
setTimeout(function () {
rafPolyfill(callback);
}, 0);
}
};
}();
var cafPolyfill = function cafPolyfill(id) {
return clearTimeout(id);
};
var requestAnimationFrame = typeof window !== "undefined" ? window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || rafPolyfill : global.requestAnimationFrame || rafPolyfill;
var cancelAnimationFrame = typeof window !== "undefined" ? window.cancelAnimationFrame || window.webkitCancelAnimationFrame || window.mozCancelAnimationFrame || cafPolyfill : global.cancelAnimationFrame || cafPolyfill;
var warn = function warn(msg) {
return console && typeof console.warn === "function" && console.warn(msg);
};
var _helmetCallback = null;
var handleClientStateChange = function handleClientStateChange(newState) {
if (_helmetCallback) {
cancelAnimationFrame(_helmetCallback);
}
if (newState.defer) {
_helmetCallback = requestAnimationFrame(function () {
commitTagChanges(newState, function () {
_helmetCallback = null;
});
});
} else {
commitTagChanges(newState);
_helmetCallback = null;
}
};
var commitTagChanges = function commitTagChanges(newState, cb) {
var baseTag = newState.baseTag,
bodyAttributes = newState.bodyAttributes,
htmlAttributes = newState.htmlAttributes,
linkTags = newState.linkTags,
metaTags = newState.metaTags,
noscriptTags = newState.noscriptTags,
onChangeClientState = newState.onChangeClientState,
scriptTags = newState.scriptTags,
styleTags = newState.styleTags,
title = newState.title,
titleAttributes = newState.titleAttributes;
updateAttributes(_HelmetConstants.TAG_NAMES.BODY, bodyAttributes);
updateAttributes(_HelmetConstants.TAG_NAMES.HTML, htmlAttributes);
updateTitle(title, titleAttributes);
var tagUpdates = {
baseTag: updateTags(_HelmetConstants.TAG_NAMES.BASE, baseTag),
linkTags: updateTags(_HelmetConstants.TAG_NAMES.LINK, linkTags),
metaTags: updateTags(_HelmetConstants.TAG_NAMES.META, metaTags),
noscriptTags: updateTags(_HelmetConstants.TAG_NAMES.NOSCRIPT, noscriptTags),
scriptTags: updateTags(_HelmetConstants.TAG_NAMES.SCRIPT, scriptTags),
styleTags: updateTags(_HelmetConstants.TAG_NAMES.STYLE, styleTags)
};
var addedTags = {};
var removedTags = {};
Object.keys(tagUpdates).forEach(function (tagType) {
var _tagUpdates$tagType = tagUpdates[tagType],
newTags = _tagUpdates$tagType.newTags,
oldTags = _tagUpdates$tagType.oldTags;
if (newTags.length) {
addedTags[tagType] = newTags;
}
if (oldTags.length) {
removedTags[tagType] = tagUpdates[tagType].oldTags;
}
});
cb && cb();
onChangeClientState(newState, addedTags, removedTags);
};
var flattenArray = function flattenArray(possibleArray) {
return Array.isArray(possibleArray) ? possibleArray.join("") : possibleArray;
};
var updateTitle = function updateTitle(title, attributes) {
if (typeof title !== "undefined" && document.title !== title) {
document.title = flattenArray(title);
}
updateAttributes(_HelmetConstants.TAG_NAMES.TITLE, attributes);
};
var updateAttributes = function updateAttributes(tagName, attributes) {
var elementTag = document.getElementsByTagName(tagName)[0];
if (!elementTag) {
return;
}
var helmetAttributeString = elementTag.getAttribute(_HelmetConstants.HELMET_ATTRIBUTE);
var helmetAttributes = helmetAttributeString ? helmetAttributeString.split(",") : [];
var attributesToRemove = [].concat(helmetAttributes);
var attributeKeys = Object.keys(attributes);
for (var i = 0; i < attributeKeys.length; i++) {
var attribute = attributeKeys[i];
var value = attributes[attribute] || "";
if (elementTag.getAttribute(attribute) !== value) {
elementTag.setAttribute(attribute, value);
}
if (helmetAttributes.indexOf(attribute) === -1) {
helmetAttributes.push(attribute);
}
var indexToSave = attributesToRemove.indexOf(attribute);
if (indexToSave !== -1) {
attributesToRemove.splice(indexToSave, 1);
}
}
for (var _i = attributesToRemove.length - 1; _i >= 0; _i--) {
elementTag.removeAttribute(attributesToRemove[_i]);
}
if (helmetAttributes.length === attributesToRemove.length) {
elementTag.removeAttribute(_HelmetConstants.HELMET_ATTRIBUTE);
} else if (elementTag.getAttribute(_HelmetConstants.HELMET_ATTRIBUTE) !== attributeKeys.join(",")) {
elementTag.setAttribute(_HelmetConstants.HELMET_ATTRIBUTE, attributeKeys.join(","));
}
};
var updateTags = function updateTags(type, tags) {
var headElement = document.head || document.querySelector(_HelmetConstants.TAG_NAMES.HEAD);
var tagNodes = headElement.querySelectorAll(type + "[" + _HelmetConstants.HELMET_ATTRIBUTE + "]");
var oldTags = Array.prototype.slice.call(tagNodes);
var newTags = [];
var indexToDelete = void 0;
if (tags && tags.length) {
tags.forEach(function (tag) {
var newElement = document.createElement(type);
for (var attribute in tag) {
if (tag.hasOwnProperty(attribute)) {
if (attribute === _HelmetConstants.TAG_PROPERTIES.INNER_HTML) {
newElement.innerHTML = tag.innerHTML;
} else if (attribute === _HelmetConstants.TAG_PROPERTIES.CSS_TEXT) {
if (newElement.styleSheet) {
newElement.styleSheet.cssText = tag.cssText;
} else {
newElement.appendChild(document.createTextNode(tag.cssText));
}
} else {
var value = typeof tag[attribute] === "undefined" ? "" : tag[attribute];
newElement.setAttribute(attribute, value);
}
}
}
newElement.setAttribute(_HelmetConstants.HELMET_ATTRIBUTE, "true");
// Remove a duplicate tag from domTagstoRemove, so it isn't cleared.
if (oldTags.some(function (existingTag, index) {
indexToDelete = index;
return newElement.isEqualNode(existingTag);
})) {
oldTags.splice(indexToDelete, 1);
} else {
newTags.push(newElement);
}
});
}
oldTags.forEach(function (tag) {
return tag.parentNode.removeChild(tag);
});
newTags.forEach(function (tag) {
return headElement.appendChild(tag);
});
return {
oldTags: oldTags,
newTags: newTags
};
};
var generateElementAttributesAsString = function generateElementAttributesAsString(attributes) {
return Object.keys(attributes).reduce(function (str, key) {
var attr = typeof attributes[key] !== "undefined" ? key + "=\"" + attributes[key] + "\"" : "" + key;
return str ? str + " " + attr : attr;
}, "");
};
var generateTitleAsString = function generateTitleAsString(type, title, attributes, encode) {
var attributeString = generateElementAttributesAsString(attributes);
var flattenedTitle = flattenArray(title);
return attributeString ? "<" + type + " " + _HelmetConstants.HELMET_ATTRIBUTE + "=\"true\" " + attributeString + ">" + encodeSpecialCharacters(flattenedTitle, encode) + "</" + type + ">" : "<" + type + " " + _HelmetConstants.HELMET_ATTRIBUTE + "=\"true\">" + encodeSpecialCharacters(flattenedTitle, encode) + "</" + type + ">";
};
var generateTagsAsString = function generateTagsAsString(type, tags, encode) {
return tags.reduce(function (str, tag) {
var attributeHtml = Object.keys(tag).filter(function (attribute) {
return !(attribute === _HelmetConstants.TAG_PROPERTIES.INNER_HTML || attribute === _HelmetConstants.TAG_PROPERTIES.CSS_TEXT);
}).reduce(function (string, attribute) {
var attr = typeof tag[attribute] === "undefined" ? attribute : attribute + "=\"" + encodeSpecialCharacters(tag[attribute], encode) + "\"";
return string ? string + " " + attr : attr;
}, "");
var tagContent = tag.innerHTML || tag.cssText || "";
var isSelfClosing = _HelmetConstants.SELF_CLOSING_TAGS.indexOf(type) === -1;
return str + "<" + type + " " + _HelmetConstants.HELMET_ATTRIBUTE + "=\"true\" " + attributeHtml + (isSelfClosing ? "/>" : ">" + tagContent + "</" + type + ">");
}, "");
};
var convertElementAttributestoReactProps = function convertElementAttributestoReactProps(attributes) {
var initProps = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
return Object.keys(attributes).reduce(function (obj, key) {
obj[_HelmetConstants.REACT_TAG_MAP[key] || key] = attributes[key];
return obj;
}, initProps);
};
var convertReactPropstoHtmlAttributes = function convertReactPropstoHtmlAttributes(props) {
var initAttributes = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
return Object.keys(props).reduce(function (obj, key) {
obj[_HelmetConstants.HTML_TAG_MAP[key] || key] = props[key];
return obj;
}, initAttributes);
};
var generateTitleAsReactComponent = function generateTitleAsReactComponent(type, title, attributes) {
var _initProps;
// assigning into an array to define toString function on it
var initProps = (_initProps = {
key: title
}, _initProps[_HelmetConstants.HELMET_ATTRIBUTE] = true, _initProps);
var props = convertElementAttributestoReactProps(attributes, initProps);
return [_react2.default.createElement(_HelmetConstants.TAG_NAMES.TITLE, props, title)];
};
var generateTagsAsReactComponent = function generateTagsAsReactComponent(type, tags) {
return tags.map(function (tag, i) {
var _mappedTag;
var mappedTag = (_mappedTag = {
key: i
}, _mappedTag[_HelmetConstants.HELMET_ATTRIBUTE] = true, _mappedTag);
Object.keys(tag).forEach(function (attribute) {
var mappedAttribute = _HelmetConstants.REACT_TAG_MAP[attribute] || attribute;
if (mappedAttribute === _HelmetConstants.TAG_PROPERTIES.INNER_HTML || mappedAttribute === _HelmetConstants.TAG_PROPERTIES.CSS_TEXT) {
var content = tag.innerHTML || tag.cssText;
mappedTag.dangerouslySetInnerHTML = { __html: content };
} else {
mappedTag[mappedAttribute] = tag[attribute];
}
});
return _react2.default.createElement(type, mappedTag);
});
};
var getMethodsForTag = function getMethodsForTag(type, tags, encode) {
switch (type) {
case _HelmetConstants.TAG_NAMES.TITLE:
return {
toComponent: function toComponent() {
return generateTitleAsReactComponent(type, tags.title, tags.titleAttributes, encode);
},
toString: function toString() {
return generateTitleAsString(type, tags.title, tags.titleAttributes, encode);
}
};
case _HelmetConstants.ATTRIBUTE_NAMES.BODY:
case _HelmetConstants.ATTRIBUTE_NAMES.HTML:
return {
toComponent: function toComponent() {
return convertElementAttributestoReactProps(tags);
},
toString: function toString() {
return generateElementAttributesAsString(tags);
}
};
default:
return {
toComponent: function toComponent() {
return generateTagsAsReactComponent(type, tags);
},
toString: function toString() {
return generateTagsAsString(type, tags, encode);
}
};
}
};
var mapStateOnServer = function mapStateOnServer(_ref) {
var baseTag = _ref.baseTag,
bodyAttributes = _ref.bodyAttributes,
encode = _ref.encode,
htmlAttributes = _ref.htmlAttributes,
linkTags = _ref.linkTags,
metaTags = _ref.metaTags,
noscriptTags = _ref.noscriptTags,
scriptTags = _ref.scriptTags,
styleTags = _ref.styleTags,
_ref$title = _ref.title,
title = _ref$title === undefined ? "" : _ref$title,
titleAttributes = _ref.titleAttributes;
return {
base: getMethodsForTag(_HelmetConstants.TAG_NAMES.BASE, baseTag, encode),
bodyAttributes: getMethodsForTag(_HelmetConstants.ATTRIBUTE_NAMES.BODY, bodyAttributes, encode),
htmlAttributes: getMethodsForTag(_HelmetConstants.ATTRIBUTE_NAMES.HTML, htmlAttributes, encode),
link: getMethodsForTag(_HelmetConstants.TAG_NAMES.LINK, linkTags, encode),
meta: getMethodsForTag(_HelmetConstants.TAG_NAMES.META, metaTags, encode),
noscript: getMethodsForTag(_HelmetConstants.TAG_NAMES.NOSCRIPT, noscriptTags, encode),
script: getMethodsForTag(_HelmetConstants.TAG_NAMES.SCRIPT, scriptTags, encode),
style: getMethodsForTag(_HelmetConstants.TAG_NAMES.STYLE, styleTags, encode),
title: getMethodsForTag(_HelmetConstants.TAG_NAMES.TITLE, { title: title, titleAttributes: titleAttributes }, encode)
};
};
exports.convertReactPropstoHtmlAttributes = convertReactPropstoHtmlAttributes;
exports.handleClientStateChange = handleClientStateChange;
exports.mapStateOnServer = mapStateOnServer;
exports.reducePropsToState = reducePropsToState;
exports.requestAnimationFrame = requestAnimationFrame;
exports.warn = warn;