/opt/canhelp/node_modules/next/dist/client
Edit: /opt/canhelp/node_modules/next/dist/client/head-manager.js.map (8342B)
{"version":3,"sources":["../../src/client/head-manager.ts"],"sourcesContent":["import { setAttributesFromProps } from './set-attributes-from-props'\n\nimport type { JSX } from 'react'\n\nfunction reactElementToDOM({ type, props }: JSX.Element): HTMLElement {\n const el: HTMLElement = document.createElement(type)\n setAttributesFromProps(el, props)\n\n const { children, dangerouslySetInnerHTML } = props\n if (dangerouslySetInnerHTML) {\n el.innerHTML = dangerouslySetInnerHTML.__html || ''\n } else if (children) {\n el.textContent =\n typeof children === 'string'\n ? children\n : Array.isArray(children)\n ? children.join('')\n : ''\n }\n return el\n}\n\n/**\n * When a `nonce` is present on an element, browsers such as Chrome and Firefox strip it out of the\n * actual HTML attributes for security reasons *when the element is added to the document*. Thus,\n * given two equivalent elements that have nonces, `Element,isEqualNode()` will return false if one\n * of those elements gets added to the document. Although the `element.nonce` property will be the\n * same for both elements, the one that was added to the document will return an empty string for\n * its nonce HTML attribute value.\n *\n * This custom `isEqualNode()` function therefore removes the nonce value from the `newTag` before\n * comparing it to `oldTag`, restoring it afterwards.\n *\n * For more information, see:\n * https://bugs.chromium.org/p/chromium/issues/detail?id=1211471#c12\n */\nexport function isEqualNode(oldTag: Element, newTag: Element) {\n if (oldTag instanceof HTMLElement && newTag instanceof HTMLElement) {\n const nonce = newTag.getAttribute('nonce')\n // Only strip the nonce if `oldTag` has had it stripped. An element's nonce attribute will not\n // be stripped if there is no content security policy response header that includes a nonce.\n if (nonce && !oldTag.getAttribute('nonce')) {\n const cloneTag = newTag.cloneNode(true) as typeof newTag\n cloneTag.setAttribute('nonce', '')\n cloneTag.nonce = nonce\n return nonce === oldTag.nonce && oldTag.isEqualNode(cloneTag)\n }\n }\n\n return oldTag.isEqualNode(newTag)\n}\n\nfunction updateElements(type: string, components: JSX.Element[]) {\n const headEl = document.querySelector('head')\n if (!headEl) return\n\n const oldTags = new Set(headEl.querySelectorAll(`${type}[data-next-head]`))\n\n if (type === 'meta') {\n const metaCharset = headEl.querySelector('meta[charset]')\n if (metaCharset !== null) {\n oldTags.add(metaCharset)\n }\n }\n\n const newTags: Element[] = []\n for (let i = 0; i < components.length; i++) {\n const component = components[i]\n const newTag = reactElementToDOM(component)\n newTag.setAttribute('data-next-head', '')\n\n let isNew = true\n for (const oldTag of oldTags) {\n if (isEqualNode(oldTag, newTag)) {\n oldTags.delete(oldTag)\n isNew = false\n break\n }\n }\n\n if (isNew) {\n newTags.push(newTag)\n }\n }\n\n for (const oldTag of oldTags) {\n oldTag.parentNode?.removeChild(oldTag)\n }\n\n for (const newTag of newTags) {\n // meta[charset] must be first element so special case\n if (\n newTag.tagName.toLowerCase() === 'meta' &&\n newTag.getAttribute('charset') !== null\n ) {\n headEl.prepend(newTag)\n }\n headEl.appendChild(newTag)\n }\n}\n\nexport default function initHeadManager(): {\n mountedInstances: Set
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