From bce557cc2dc767628bed6aac87301a1be7c5431b Mon Sep 17 00:00:00 2001 From: rxliuli Date: Tue, 4 Nov 2025 05:03:50 +0800 Subject: init commit --- node_modules/svelte/src/runtime/internal/dom.js | 1251 +++++++++++++++++++++++ 1 file changed, 1251 insertions(+) create mode 100644 node_modules/svelte/src/runtime/internal/dom.js (limited to 'node_modules/svelte/src/runtime/internal/dom.js') diff --git a/node_modules/svelte/src/runtime/internal/dom.js b/node_modules/svelte/src/runtime/internal/dom.js new file mode 100644 index 0000000..37cbb31 --- /dev/null +++ b/node_modules/svelte/src/runtime/internal/dom.js @@ -0,0 +1,1251 @@ +import { contenteditable_truthy_values, has_prop } from './utils.js'; + +import { ResizeObserverSingleton } from './ResizeObserverSingleton.js'; + +// Track which nodes are claimed during hydration. Unclaimed nodes can then be removed from the DOM +// at the end of hydration without touching the remaining nodes. +let is_hydrating = false; + +/** + * @returns {void} + */ +export function start_hydrating() { + is_hydrating = true; +} + +/** + * @returns {void} + */ +export function end_hydrating() { + is_hydrating = false; +} + +/** + * @param {number} low + * @param {number} high + * @param {(index: number) => number} key + * @param {number} value + * @returns {number} + */ +function upper_bound(low, high, key, value) { + // Return first index of value larger than input value in the range [low, high) + while (low < high) { + const mid = low + ((high - low) >> 1); + if (key(mid) <= value) { + low = mid + 1; + } else { + high = mid; + } + } + return low; +} + +/** + * @param {NodeEx} target + * @returns {void} + */ +function init_hydrate(target) { + if (target.hydrate_init) return; + target.hydrate_init = true; + // We know that all children have claim_order values since the unclaimed have been detached if target is not + + let children = /** @type {ArrayLike} */ (target.childNodes); + // If target is , there may be children without claim_order + if (target.nodeName === 'HEAD') { + const my_children = []; + for (let i = 0; i < children.length; i++) { + const node = children[i]; + if (node.claim_order !== undefined) { + my_children.push(node); + } + } + children = my_children; + } + /* + * Reorder claimed children optimally. + * We can reorder claimed children optimally by finding the longest subsequence of + * nodes that are already claimed in order and only moving the rest. The longest + * subsequence of nodes that are claimed in order can be found by + * computing the longest increasing subsequence of .claim_order values. + * + * This algorithm is optimal in generating the least amount of reorder operations + * possible. + * + * Proof: + * We know that, given a set of reordering operations, the nodes that do not move + * always form an increasing subsequence, since they do not move among each other + * meaning that they must be already ordered among each other. Thus, the maximal + * set of nodes that do not move form a longest increasing subsequence. + */ + // Compute longest increasing subsequence + // m: subsequence length j => index k of smallest value that ends an increasing subsequence of length j + const m = new Int32Array(children.length + 1); + // Predecessor indices + 1 + const p = new Int32Array(children.length); + m[0] = -1; + let longest = 0; + for (let i = 0; i < children.length; i++) { + const current = children[i].claim_order; + // Find the largest subsequence length such that it ends in a value less than our current value + // upper_bound returns first greater value, so we subtract one + // with fast path for when we are on the current longest subsequence + const seq_len = + (longest > 0 && children[m[longest]].claim_order <= current + ? longest + 1 + : upper_bound(1, longest, (idx) => children[m[idx]].claim_order, current)) - 1; + p[i] = m[seq_len] + 1; + const new_len = seq_len + 1; + // We can guarantee that current is the smallest value. Otherwise, we would have generated a longer sequence. + m[new_len] = i; + longest = Math.max(new_len, longest); + } + // The longest increasing subsequence of nodes (initially reversed) + + /** + * @type {NodeEx2[]} + */ + const lis = []; + // The rest of the nodes, nodes that will be moved + + /** + * @type {NodeEx2[]} + */ + const to_move = []; + let last = children.length - 1; + for (let cur = m[longest] + 1; cur != 0; cur = p[cur - 1]) { + lis.push(children[cur - 1]); + for (; last >= cur; last--) { + to_move.push(children[last]); + } + last--; + } + for (; last >= 0; last--) { + to_move.push(children[last]); + } + lis.reverse(); + // We sort the nodes being moved to guarantee that their insertion order matches the claim order + to_move.sort((a, b) => a.claim_order - b.claim_order); + // Finally, we move the nodes + for (let i = 0, j = 0; i < to_move.length; i++) { + while (j < lis.length && to_move[i].claim_order >= lis[j].claim_order) { + j++; + } + const anchor = j < lis.length ? lis[j] : null; + target.insertBefore(to_move[i], anchor); + } +} + +/** + * @param {Node} target + * @param {Node} node + * @returns {void} + */ +export function append(target, node) { + target.appendChild(node); +} + +/** + * @param {Node} target + * @param {string} style_sheet_id + * @param {string} styles + * @returns {void} + */ +export function append_styles(target, style_sheet_id, styles) { + const append_styles_to = get_root_for_style(target); + if (!append_styles_to.getElementById(style_sheet_id)) { + const style = element('style'); + style.id = style_sheet_id; + style.textContent = styles; + append_stylesheet(append_styles_to, style); + } +} + +/** + * @param {Node} node + * @returns {ShadowRoot | Document} + */ +export function get_root_for_style(node) { + if (!node) return document; + const root = node.getRootNode ? node.getRootNode() : node.ownerDocument; + if (root && /** @type {ShadowRoot} */ (root).host) { + return /** @type {ShadowRoot} */ (root); + } + return node.ownerDocument; +} + +/** + * @param {Node} node + * @returns {CSSStyleSheet} + */ +export function append_empty_stylesheet(node) { + const style_element = element('style'); + // For transitions to work without 'style-src: unsafe-inline' Content Security Policy, + // these empty tags need to be allowed with a hash as a workaround until we move to the Web Animations API. + // Using the hash for the empty string (for an empty tag) works in all browsers except Safari. + // So as a workaround for the workaround, when we append empty style tags we set their content to /* empty */. + // The hash 'sha256-9OlNO0DNEeaVzHL4RZwCLsBHA8WBQ8toBp/4F5XV2nc=' will then work even in Safari. + style_element.textContent = '/* empty */'; + append_stylesheet(get_root_for_style(node), style_element); + return style_element.sheet; +} + +/** + * @param {ShadowRoot | Document} node + * @param {HTMLStyleElement} style + * @returns {CSSStyleSheet} + */ +function append_stylesheet(node, style) { + append(/** @type {Document} */ (node).head || node, style); + return style.sheet; +} + +/** + * @param {NodeEx} target + * @param {NodeEx} node + * @returns {void} + */ +export function append_hydration(target, node) { + if (is_hydrating) { + init_hydrate(target); + if ( + target.actual_end_child === undefined || + (target.actual_end_child !== null && target.actual_end_child.parentNode !== target) + ) { + target.actual_end_child = target.firstChild; + } + // Skip nodes of undefined ordering + while (target.actual_end_child !== null && target.actual_end_child.claim_order === undefined) { + target.actual_end_child = target.actual_end_child.nextSibling; + } + if (node !== target.actual_end_child) { + // We only insert if the ordering of this node should be modified or the parent node is not target + if (node.claim_order !== undefined || node.parentNode !== target) { + target.insertBefore(node, target.actual_end_child); + } + } else { + target.actual_end_child = node.nextSibling; + } + } else if (node.parentNode !== target || node.nextSibling !== null) { + target.appendChild(node); + } +} + +/** + * @param {Node} target + * @param {Node} node + * @param {Node} [anchor] + * @returns {void} + */ +export function insert(target, node, anchor) { + target.insertBefore(node, anchor || null); +} + +/** + * @param {NodeEx} target + * @param {NodeEx} node + * @param {NodeEx} [anchor] + * @returns {void} + */ +export function insert_hydration(target, node, anchor) { + if (is_hydrating && !anchor) { + append_hydration(target, node); + } else if (node.parentNode !== target || node.nextSibling != anchor) { + target.insertBefore(node, anchor || null); + } +} + +/** + * @param {Node} node + * @returns {void} + */ +export function detach(node) { + if (node.parentNode) { + node.parentNode.removeChild(node); + } +} + +/** + * @returns {void} */ +export function destroy_each(iterations, detaching) { + for (let i = 0; i < iterations.length; i += 1) { + if (iterations[i]) iterations[i].d(detaching); + } +} + +/** + * @template {keyof HTMLElementTagNameMap} K + * @param {K} name + * @returns {HTMLElementTagNameMap[K]} + */ +export function element(name) { + return document.createElement(name); +} + +/** + * @template {keyof HTMLElementTagNameMap} K + * @param {K} name + * @param {string} is + * @returns {HTMLElementTagNameMap[K]} + */ +export function element_is(name, is) { + return document.createElement(name, { is }); +} + +/** + * @template T + * @template {keyof T} K + * @param {T} obj + * @param {K[]} exclude + * @returns {Pick>} + */ +export function object_without_properties(obj, exclude) { + const target = /** @type {Pick>} */ ({}); + for (const k in obj) { + if ( + has_prop(obj, k) && + // @ts-ignore + exclude.indexOf(k) === -1 + ) { + // @ts-ignore + target[k] = obj[k]; + } + } + return target; +} + +/** + * @template {keyof SVGElementTagNameMap} K + * @param {K} name + * @returns {SVGElement} + */ +export function svg_element(name) { + return document.createElementNS('http://www.w3.org/2000/svg', name); +} + +/** + * @param {string} data + * @returns {Text} + */ +export function text(data) { + return document.createTextNode(data); +} + +/** + * @returns {Text} */ +export function space() { + return text(' '); +} + +/** + * @returns {Text} */ +export function empty() { + return text(''); +} + +/** + * @param {string} content + * @returns {Comment} + */ +export function comment(content) { + return document.createComment(content); +} + +/** + * @param {EventTarget} node + * @param {string} event + * @param {EventListenerOrEventListenerObject} handler + * @param {boolean | AddEventListenerOptions | EventListenerOptions} [options] + * @returns {() => void} + */ +export function listen(node, event, handler, options) { + node.addEventListener(event, handler, options); + return () => node.removeEventListener(event, handler, options); +} + +/** + * @returns {(event: any) => any} */ +export function prevent_default(fn) { + return function (event) { + event.preventDefault(); + // @ts-ignore + return fn.call(this, event); + }; +} + +/** + * @returns {(event: any) => any} */ +export function stop_propagation(fn) { + return function (event) { + event.stopPropagation(); + // @ts-ignore + return fn.call(this, event); + }; +} + +/** + * @returns {(event: any) => any} */ +export function stop_immediate_propagation(fn) { + return function (event) { + event.stopImmediatePropagation(); + // @ts-ignore + return fn.call(this, event); + }; +} + +/** + * @returns {(event: any) => void} */ +export function self(fn) { + return function (event) { + // @ts-ignore + if (event.target === this) fn.call(this, event); + }; +} + +/** + * @returns {(event: any) => void} */ +export function trusted(fn) { + return function (event) { + // @ts-ignore + if (event.isTrusted) fn.call(this, event); + }; +} + +/** + * @param {Element} node + * @param {string} attribute + * @param {string} [value] + * @returns {void} + */ +export function attr(node, attribute, value) { + if (value == null) node.removeAttribute(attribute); + else if (node.getAttribute(attribute) !== value) node.setAttribute(attribute, value); +} +/** + * List of attributes that should always be set through the attr method, + * because updating them through the property setter doesn't work reliably. + * In the example of `width`/`height`, the problem is that the setter only + * accepts numeric values, but the attribute can also be set to a string like `50%`. + * If this list becomes too big, rethink this approach. + */ +const always_set_through_set_attribute = ['width', 'height']; + +/** + * @param {Element & ElementCSSInlineStyle} node + * @param {{ [x: string]: string }} attributes + * @returns {void} + */ +export function set_attributes(node, attributes) { + // @ts-ignore + const descriptors = Object.getOwnPropertyDescriptors(node.__proto__); + for (const key in attributes) { + if (attributes[key] == null) { + node.removeAttribute(key); + } else if (key === 'style') { + node.style.cssText = attributes[key]; + } else if (key === '__value') { + /** @type {any} */ (node).value = node[key] = attributes[key]; + } else if ( + descriptors[key] && + descriptors[key].set && + always_set_through_set_attribute.indexOf(key) === -1 + ) { + node[key] = attributes[key]; + } else { + attr(node, key, attributes[key]); + } + } +} + +/** + * @param {Element & ElementCSSInlineStyle} node + * @param {{ [x: string]: string }} attributes + * @returns {void} + */ +export function set_svg_attributes(node, attributes) { + for (const key in attributes) { + attr(node, key, attributes[key]); + } +} + +/** + * @param {Record} data_map + * @returns {void} + */ +export function set_custom_element_data_map(node, data_map) { + Object.keys(data_map).forEach((key) => { + set_custom_element_data(node, key, data_map[key]); + }); +} + +/** + * @returns {void} */ +export function set_custom_element_data(node, prop, value) { + const lower = prop.toLowerCase(); // for backwards compatibility with existing behavior we do lowercase first + if (lower in node) { + node[lower] = typeof node[lower] === 'boolean' && value === '' ? true : value; + } else if (prop in node) { + node[prop] = typeof node[prop] === 'boolean' && value === '' ? true : value; + } else { + attr(node, prop, value); + } +} + +/** + * @param {string} tag + */ +export function set_dynamic_element_data(tag) { + return /-/.test(tag) ? set_custom_element_data_map : set_attributes; +} + +/** + * @returns {void} + */ +export function xlink_attr(node, attribute, value) { + node.setAttributeNS('http://www.w3.org/1999/xlink', attribute, value); +} + +/** + * @param {HTMLElement} node + * @returns {string} + */ +export function get_svelte_dataset(node) { + return node.dataset.svelteH; +} + +/** + * @returns {unknown[]} */ +export function get_binding_group_value(group, __value, checked) { + const value = new Set(); + for (let i = 0; i < group.length; i += 1) { + if (group[i].checked) value.add(group[i].__value); + } + if (!checked) { + value.delete(__value); + } + return Array.from(value); +} + +/** + * @param {HTMLInputElement[]} group + * @returns {{ p(...inputs: HTMLInputElement[]): void; r(): void; }} + */ +export function init_binding_group(group) { + /** + * @type {HTMLInputElement[]} */ + let _inputs; + return { + /* push */ p(...inputs) { + _inputs = inputs; + _inputs.forEach((input) => group.push(input)); + }, + /* remove */ r() { + _inputs.forEach((input) => group.splice(group.indexOf(input), 1)); + } + }; +} + +/** + * @param {number[]} indexes + * @returns {{ u(new_indexes: number[]): void; p(...inputs: HTMLInputElement[]): void; r: () => void; }} + */ +export function init_binding_group_dynamic(group, indexes) { + /** + * @type {HTMLInputElement[]} */ + let _group = get_binding_group(group); + + /** + * @type {HTMLInputElement[]} */ + let _inputs; + + function get_binding_group(group) { + for (let i = 0; i < indexes.length; i++) { + group = group[indexes[i]] = group[indexes[i]] || []; + } + return group; + } + + /** + * @returns {void} */ + function push() { + _inputs.forEach((input) => _group.push(input)); + } + + /** + * @returns {void} */ + function remove() { + _inputs.forEach((input) => _group.splice(_group.indexOf(input), 1)); + } + return { + /* update */ u(new_indexes) { + indexes = new_indexes; + const new_group = get_binding_group(group); + if (new_group !== _group) { + remove(); + _group = new_group; + push(); + } + }, + /* push */ p(...inputs) { + _inputs = inputs; + push(); + }, + /* remove */ r: remove + }; +} + +/** @returns {number} */ +export function to_number(value) { + return value === '' ? null : +value; +} + +/** @returns {any[]} */ +export function time_ranges_to_array(ranges) { + const array = []; + for (let i = 0; i < ranges.length; i += 1) { + array.push({ start: ranges.start(i), end: ranges.end(i) }); + } + return array; +} + +/** + * @param {Element} element + * @returns {ChildNode[]} + */ +export function children(element) { + return Array.from(element.childNodes); +} + +/** + * @param {ChildNodeArray} nodes + * @returns {void} + */ +function init_claim_info(nodes) { + if (nodes.claim_info === undefined) { + nodes.claim_info = { last_index: 0, total_claimed: 0 }; + } +} + +/** + * @template {ChildNodeEx} R + * @param {ChildNodeArray} nodes + * @param {(node: ChildNodeEx) => node is R} predicate + * @param {(node: ChildNodeEx) => ChildNodeEx | undefined} process_node + * @param {() => R} create_node + * @param {boolean} dont_update_last_index + * @returns {R} + */ +function claim_node(nodes, predicate, process_node, create_node, dont_update_last_index = false) { + // Try to find nodes in an order such that we lengthen the longest increasing subsequence + init_claim_info(nodes); + const result_node = (() => { + // We first try to find an element after the previous one + for (let i = nodes.claim_info.last_index; i < nodes.length; i++) { + const node = nodes[i]; + if (predicate(node)) { + const replacement = process_node(node); + if (replacement === undefined) { + nodes.splice(i, 1); + } else { + nodes[i] = replacement; + } + if (!dont_update_last_index) { + nodes.claim_info.last_index = i; + } + return node; + } + } + // Otherwise, we try to find one before + // We iterate in reverse so that we don't go too far back + for (let i = nodes.claim_info.last_index - 1; i >= 0; i--) { + const node = nodes[i]; + if (predicate(node)) { + const replacement = process_node(node); + if (replacement === undefined) { + nodes.splice(i, 1); + } else { + nodes[i] = replacement; + } + if (!dont_update_last_index) { + nodes.claim_info.last_index = i; + } else if (replacement === undefined) { + // Since we spliced before the last_index, we decrease it + nodes.claim_info.last_index--; + } + return node; + } + } + // If we can't find any matching node, we create a new one + return create_node(); + })(); + result_node.claim_order = nodes.claim_info.total_claimed; + nodes.claim_info.total_claimed += 1; + return result_node; +} + +/** + * @param {ChildNodeArray} nodes + * @param {string} name + * @param {{ [key: string]: boolean }} attributes + * @param {(name: string) => Element | SVGElement} create_element + * @returns {Element | SVGElement} + */ +function claim_element_base(nodes, name, attributes, create_element) { + return claim_node( + nodes, + /** @returns {node is Element | SVGElement} */ + (node) => node.nodeName === name, + /** @param {Element} node */ + (node) => { + const remove = []; + for (let j = 0; j < node.attributes.length; j++) { + const attribute = node.attributes[j]; + if (!attributes[attribute.name]) { + remove.push(attribute.name); + } + } + remove.forEach((v) => node.removeAttribute(v)); + return undefined; + }, + () => create_element(name) + ); +} + +/** + * @param {ChildNodeArray} nodes + * @param {string} name + * @param {{ [key: string]: boolean }} attributes + * @returns {Element | SVGElement} + */ +export function claim_element(nodes, name, attributes) { + return claim_element_base(nodes, name, attributes, element); +} + +/** + * @param {ChildNodeArray} nodes + * @param {string} name + * @param {{ [key: string]: boolean }} attributes + * @returns {Element | SVGElement} + */ +export function claim_svg_element(nodes, name, attributes) { + return claim_element_base(nodes, name, attributes, svg_element); +} + +/** + * @param {ChildNodeArray} nodes + * @returns {Text} + */ +export function claim_text(nodes, data) { + return claim_node( + nodes, + /** @returns {node is Text} */ + (node) => node.nodeType === 3, + /** @param {Text} node */ + (node) => { + const data_str = '' + data; + if (node.data.startsWith(data_str)) { + if (node.data.length !== data_str.length) { + return node.splitText(data_str.length); + } + } else { + node.data = data_str; + } + }, + () => text(data), + true // Text nodes should not update last index since it is likely not worth it to eliminate an increasing subsequence of actual elements + ); +} + +/** + * @returns {Text} */ +export function claim_space(nodes) { + return claim_text(nodes, ' '); +} + +/** + * @param {ChildNodeArray} nodes + * @returns {Comment} + */ +export function claim_comment(nodes, data) { + return claim_node( + nodes, + /** @returns {node is Comment} */ + (node) => node.nodeType === 8, + /** @param {Comment} node */ + (node) => { + node.data = '' + data; + return undefined; + }, + () => comment(data), + true + ); +} + +function get_comment_idx(nodes, text, start) { + for (let i = start; i < nodes.length; i += 1) { + const node = nodes[i]; + if (node.nodeType === 8 /* comment node */ && node.textContent.trim() === text) { + return i; + } + } + return -1; +} + +/** + * @param {boolean} is_svg + * @returns {HtmlTagHydration} + */ +export function claim_html_tag(nodes, is_svg) { + // find html opening tag + const start_index = get_comment_idx(nodes, 'HTML_TAG_START', 0); + const end_index = get_comment_idx(nodes, 'HTML_TAG_END', start_index + 1); + if (start_index === -1 || end_index === -1) { + return new HtmlTagHydration(is_svg); + } + + init_claim_info(nodes); + const html_tag_nodes = nodes.splice(start_index, end_index - start_index + 1); + detach(html_tag_nodes[0]); + detach(html_tag_nodes[html_tag_nodes.length - 1]); + const claimed_nodes = html_tag_nodes.slice(1, html_tag_nodes.length - 1); + if (claimed_nodes.length === 0) { + return new HtmlTagHydration(is_svg); + } + for (const n of claimed_nodes) { + n.claim_order = nodes.claim_info.total_claimed; + nodes.claim_info.total_claimed += 1; + } + return new HtmlTagHydration(is_svg, claimed_nodes); +} + +/** + * @param {Text} text + * @param {unknown} data + * @returns {void} + */ +export function set_data(text, data) { + data = '' + data; + if (text.data === data) return; + text.data = /** @type {string} */ (data); +} + +/** + * @param {Text} text + * @param {unknown} data + * @returns {void} + */ +export function set_data_contenteditable(text, data) { + data = '' + data; + if (text.wholeText === data) return; + text.data = /** @type {string} */ (data); +} + +/** + * @param {Text} text + * @param {unknown} data + * @param {string} attr_value + * @returns {void} + */ +export function set_data_maybe_contenteditable(text, data, attr_value) { + if (~contenteditable_truthy_values.indexOf(attr_value)) { + set_data_contenteditable(text, data); + } else { + set_data(text, data); + } +} + +/** + * @returns {void} */ +export function set_input_value(input, value) { + input.value = value == null ? '' : value; +} + +/** + * @returns {void} */ +export function set_input_type(input, type) { + try { + input.type = type; + } catch (e) { + // do nothing + } +} + +/** + * @returns {void} */ +export function set_style(node, key, value, important) { + if (value == null) { + node.style.removeProperty(key); + } else { + node.style.setProperty(key, value, important ? 'important' : ''); + } +} + +/** + * @returns {void} */ +export function select_option(select, value, mounting) { + for (let i = 0; i < select.options.length; i += 1) { + const option = select.options[i]; + if (option.__value === value) { + option.selected = true; + return; + } + } + if (!mounting || value !== undefined) { + select.selectedIndex = -1; // no option should be selected + } +} + +/** + * @returns {void} */ +export function select_options(select, value) { + for (let i = 0; i < select.options.length; i += 1) { + const option = select.options[i]; + option.selected = ~value.indexOf(option.__value); + } +} + +export function select_value(select) { + const selected_option = select.querySelector(':checked'); + return selected_option && selected_option.__value; +} + +export function select_multiple_value(select) { + return [].map.call(select.querySelectorAll(':checked'), (option) => option.__value); +} +// unfortunately this can't be a constant as that wouldn't be tree-shakeable +// so we cache the result instead + +/** + * @type {boolean} */ +let crossorigin; + +/** + * @returns {boolean} */ +export function is_crossorigin() { + if (crossorigin === undefined) { + crossorigin = false; + try { + if (typeof window !== 'undefined' && window.parent) { + void window.parent.document; + } + } catch (error) { + crossorigin = true; + } + } + return crossorigin; +} + +/** + * @param {HTMLElement} node + * @param {() => void} fn + * @returns {() => void} + */ +export function add_iframe_resize_listener(node, fn) { + const computed_style = getComputedStyle(node); + if (computed_style.position === 'static') { + node.style.position = 'relative'; + } + const iframe = element('iframe'); + iframe.setAttribute( + 'style', + 'display: block; position: absolute; top: 0; left: 0; width: 100%; height: 100%; ' + + 'overflow: hidden; border: 0; opacity: 0; pointer-events: none; z-index: -1;' + ); + iframe.setAttribute('aria-hidden', 'true'); + iframe.tabIndex = -1; + const crossorigin = is_crossorigin(); + + /** + * @type {() => void} + */ + let unsubscribe; + if (crossorigin) { + iframe.src = "data:text/html,"; + unsubscribe = listen( + window, + 'message', + /** @param {MessageEvent} event */ (event) => { + if (event.source === iframe.contentWindow) fn(); + } + ); + } else { + iframe.src = 'about:blank'; + iframe.onload = () => { + unsubscribe = listen(iframe.contentWindow, 'resize', fn); + // make sure an initial resize event is fired _after_ the iframe is loaded (which is asynchronous) + // see https://github.com/sveltejs/svelte/issues/4233 + fn(); + }; + } + append(node, iframe); + return () => { + if (crossorigin) { + unsubscribe(); + } else if (unsubscribe && iframe.contentWindow) { + unsubscribe(); + } + detach(iframe); + }; +} +export const resize_observer_content_box = /* @__PURE__ */ new ResizeObserverSingleton({ + box: 'content-box' +}); +export const resize_observer_border_box = /* @__PURE__ */ new ResizeObserverSingleton({ + box: 'border-box' +}); +export const resize_observer_device_pixel_content_box = /* @__PURE__ */ new ResizeObserverSingleton( + { box: 'device-pixel-content-box' } +); +export { ResizeObserverSingleton }; + +/** + * @returns {void} */ +export function toggle_class(element, name, toggle) { + // The `!!` is required because an `undefined` flag means flipping the current state. + element.classList.toggle(name, !!toggle); +} + +/** + * @template T + * @param {string} type + * @param {T} [detail] + * @param {{ bubbles?: boolean, cancelable?: boolean }} [options] + * @returns {CustomEvent} + */ +export function custom_event(type, detail, { bubbles = false, cancelable = false } = {}) { + return new CustomEvent(type, { detail, bubbles, cancelable }); +} + +/** + * @param {string} selector + * @param {HTMLElement} parent + * @returns {ChildNodeArray} + */ +export function query_selector_all(selector, parent = document.body) { + return Array.from(parent.querySelectorAll(selector)); +} + +/** + * @param {string} nodeId + * @param {HTMLElement} head + * @returns {any[]} + */ +export function head_selector(nodeId, head) { + const result = []; + let started = 0; + for (const node of head.childNodes) { + if (node.nodeType === 8 /* comment node */) { + const comment = node.textContent.trim(); + if (comment === `HEAD_${nodeId}_END`) { + started -= 1; + result.push(node); + } else if (comment === `HEAD_${nodeId}_START`) { + started += 1; + result.push(node); + } + } else if (started > 0) { + result.push(node); + } + } + return result; +} +/** */ +export class HtmlTag { + /** + * @private + * @default false + */ + is_svg = false; + /** parent for creating node */ + e = undefined; + /** html tag nodes */ + n = undefined; + /** target */ + t = undefined; + /** anchor */ + a = undefined; + constructor(is_svg = false) { + this.is_svg = is_svg; + this.e = this.n = null; + } + + /** + * @param {string} html + * @returns {void} + */ + c(html) { + this.h(html); + } + + /** + * @param {string} html + * @param {HTMLElement | SVGElement} target + * @param {HTMLElement | SVGElement} anchor + * @returns {void} + */ + m(html, target, anchor = null) { + if (!this.e) { + if (this.is_svg) + this.e = svg_element(/** @type {keyof SVGElementTagNameMap} */ (target.nodeName)); + /** #7364 target for