next
Version:
The React Framework
164 lines (162 loc) • 7.13 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.defaultHead = defaultHead;
exports.default = void 0;
var _extends = require("@swc/helpers/lib/_extends.js").default;
var _interop_require_default = require("@swc/helpers/lib/_interop_require_default.js").default;
var _interop_require_wildcard = require("@swc/helpers/lib/_interop_require_wildcard.js").default;
var _react = _interop_require_wildcard(require("react"));
var _sideEffect = _interop_require_default(require("./side-effect"));
var _ampContext = require("./amp-context");
var _headManagerContext = require("./head-manager-context");
var _ampMode = require("./amp-mode");
var _utils = require("./utils");
function defaultHead(inAmpMode = false) {
const head = [
/*#__PURE__*/ _react.default.createElement("meta", {
charSet: "utf-8"
})
];
if (!inAmpMode) {
head.push(/*#__PURE__*/ _react.default.createElement("meta", {
name: "viewport",
content: "width=device-width"
}));
}
return head;
}
function onlyReactElement(list, child) {
// React children can be "string" or "number" in this case we ignore them for backwards compat
if (typeof child === 'string' || typeof child === 'number') {
return list;
}
// Adds support for React.Fragment
if (child.type === _react.default.Fragment) {
return list.concat(_react.default.Children.toArray(child.props.children).reduce((fragmentList, fragmentChild)=>{
if (typeof fragmentChild === 'string' || typeof fragmentChild === 'number') {
return fragmentList;
}
return fragmentList.concat(fragmentChild);
}, []));
}
return list.concat(child);
}
const METATYPES = [
'name',
'httpEquiv',
'charSet',
'itemProp'
];
/*
returns a function for filtering head child elements
which shouldn't be duplicated, like <title/>
Also adds support for deduplicated `key` properties
*/ function unique() {
const keys = new Set();
const tags = new Set();
const metaTypes = new Set();
const metaCategories = {};
return (h)=>{
let isUnique = true;
let hasKey = false;
if (h.key && typeof h.key !== 'number' && h.key.indexOf('$') > 0) {
hasKey = true;
const key = h.key.slice(h.key.indexOf('$') + 1);
if (keys.has(key)) {
isUnique = false;
} else {
keys.add(key);
}
}
// eslint-disable-next-line default-case
switch(h.type){
case 'title':
case 'base':
if (tags.has(h.type)) {
isUnique = false;
} else {
tags.add(h.type);
}
break;
case 'meta':
for(let i = 0, len = METATYPES.length; i < len; i++){
const metatype = METATYPES[i];
if (!h.props.hasOwnProperty(metatype)) continue;
if (metatype === 'charSet') {
if (metaTypes.has(metatype)) {
isUnique = false;
} else {
metaTypes.add(metatype);
}
} else {
const category = h.props[metatype];
const categories = metaCategories[metatype] || new Set();
if ((metatype !== 'name' || !hasKey) && categories.has(category)) {
isUnique = false;
} else {
categories.add(category);
metaCategories[metatype] = categories;
}
}
}
break;
}
return isUnique;
};
}
/**
*
* @param headChildrenElements List of children of <Head>
*/ function reduceComponents(headChildrenElements, props) {
return headChildrenElements.reduce(onlyReactElement, []).reverse().concat(defaultHead(props.inAmpMode).reverse()).filter(unique()).reverse().map((c, i)=>{
const key = c.key || i;
if (process.env.NODE_ENV !== 'development' && process.env.__NEXT_OPTIMIZE_FONTS && !props.inAmpMode) {
if (c.type === 'link' && c.props['href'] && // TODO(prateekbh@): Replace this with const from `constants` when the tree shaking works.
[
'https://fonts.googleapis.com/css',
'https://use.typekit.net/'
].some((url)=>c.props['href'].startsWith(url))) {
const newProps = _extends({}, c.props || {});
newProps['data-href'] = newProps['href'];
newProps['href'] = undefined;
// Add this attribute to make it easy to identify optimized tags
newProps['data-optimized-fonts'] = true;
return /*#__PURE__*/ _react.default.cloneElement(c, newProps);
}
}
if (process.env.NODE_ENV === 'development' && process.env.__NEXT_REACT_ROOT) {
// omit JSON-LD structured data snippets from the warning
if (c.type === 'script' && c.props['type'] !== 'application/ld+json') {
const srcMessage = c.props['src'] ? `<script> tag with src="${c.props['src']}"` : `inline <script>`;
(0, _utils).warnOnce(`Do not add <script> tags using next/head (see ${srcMessage}). Use next/script instead. \nSee more info here: https://nextjs.org/docs/messages/no-script-tags-in-head-component`);
} else if (c.type === 'link' && c.props['rel'] === 'stylesheet') {
(0, _utils).warnOnce(`Do not add stylesheets using next/head (see <link rel="stylesheet"> tag with href="${c.props['href']}"). Use Document instead. \nSee more info here: https://nextjs.org/docs/messages/no-stylesheets-in-head-component`);
}
}
return /*#__PURE__*/ _react.default.cloneElement(c, {
key
});
});
}
/**
* This component injects elements to `<head>` of your page.
* To avoid duplicated `tags` in `<head>` you can use the `key` property, which will make sure every tag is only rendered once.
*/ function Head({ children }) {
const ampState = (0, _react).useContext(_ampContext.AmpStateContext);
const headManager = (0, _react).useContext(_headManagerContext.HeadManagerContext);
return /*#__PURE__*/ _react.default.createElement(_sideEffect.default, {
reduceComponentsToState: reduceComponents,
headManager: headManager,
inAmpMode: (0, _ampMode).isInAmpMode(ampState)
}, children);
}
var _default = Head;
exports.default = _default;
if ((typeof exports.default === 'function' || (typeof exports.default === 'object' && exports.default !== null)) && typeof exports.default.__esModule === 'undefined') {
Object.defineProperty(exports.default, '__esModule', { value: true });
Object.assign(exports.default, exports);
module.exports = exports.default;
}
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