All files / src/internal/client/dom template.js

94.26% Statements 263/279
96.61% Branches 57/59
90% Functions 9/10
94.13% Lines 257/273

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 2742x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 14749x 14749x 11767x 11767x 11767x 14749x 2x 2x 2x 2x 2x 2x 2x 2x 2435x 2435x 2435x 2435x 2435x 2435x 2435x 2435x 2435x 2435x 2435x 2435x 2435x 8519x 3674x 3674x 3674x 4845x 8432x 2201x 2201x 2201x 4845x 4845x 8519x 8519x 8519x 8519x 992x 992x 992x 992x 8519x 3853x 3853x 4845x 4845x 2435x 2435x 2x 2x 2x 2x 2x 2x 2x 2x 3x 3x 3x 3x 5x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 2x 2x 2x 2x 2x 2x 2x 2x 2x 49x 49x 49x 49x 49x 49x 49x 49x 49x 49x 49x 49x 49x 107x 52x 52x 52x 55x 107x 48x 48x 48x 48x 5x 5x 20x 20x 48x 43x 43x 48x 55x 55x 55x 106x 5x 5x 5x 5x 106x 50x 50x 55x 55x 49x 49x 2x 2x 2x 2x 2x 2x 2x 2x                                 2x 2x 2x 2x 2x 2x 2x 2x 5x 5x 2x 2x 2x 2x 2x 2x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 2x 2x 3x 3x 3x 3x 3x 3x 3x 3x 1x 2x 2x 2x 3x 3x 2x 2x 2x 2x 2x 2x 2569x 2313x 2313x 2313x 2313x 256x 256x 256x 2569x 2x 2x 2x 2x 256x 256x 256x 256x 2x 2x 1605x 1605x 716x 716x 716x 889x 889x 889x 889x 889x 889x 889x 889x 889x 889x 2x 2x 2x 2x 2x 2x 2x 2x 12778x 4690x 4690x 4690x 4690x 8088x 12778x 5x 5x 5x 8083x 8083x 8083x  
/** @import { Effect, TemplateNode } from '#client' */
import { hydrate_next, hydrate_node, hydrating, set_hydrate_node } from './hydration.js';
import { create_text, get_first_child } from './operations.js';
import { create_fragment_from_html } from './reconciler.js';
import { current_effect } from '../runtime.js';
import { TEMPLATE_FRAGMENT, TEMPLATE_USE_IMPORT_NODE } from '../../../constants.js';
import { queue_micro_task } from './task.js';
 
/**
 * @param {TemplateNode} start
 * @param {TemplateNode | null} end
 */
export function assign_nodes(start, end) {
	var effect = /** @type {Effect} */ (current_effect);
	if (effect.nodes_start === null) {
		effect.nodes_start = start;
		effect.nodes_end = end;
	}
}
 
/**
 * @param {string} content
 * @param {number} flags
 * @returns {() => Node | Node[]}
 */
/*#__NO_SIDE_EFFECTS__*/
export function template(content, flags) {
	var is_fragment = (flags & TEMPLATE_FRAGMENT) !== 0;
	var use_import_node = (flags & TEMPLATE_USE_IMPORT_NODE) !== 0;
 
	/** @type {Node} */
	var node;
 
	/**
	 * Whether or not the first item is a text/element node. If not, we need to
	 * create an additional comment node to act as `effect.nodes.start`
	 */
	var has_start = !content.startsWith('<!>');
 
	return () => {
		if (hydrating) {
			assign_nodes(hydrate_node, null);
			return hydrate_node;
		}
 
		if (node === undefined) {
			node = create_fragment_from_html(has_start ? content : '<!>' + content);
			if (!is_fragment) node = /** @type {Node} */ (get_first_child(node));
		}
 
		var clone = /** @type {TemplateNode} */ (
			use_import_node ? document.importNode(node, true) : node.cloneNode(true)
		);
 
		if (is_fragment) {
			var start = /** @type {TemplateNode} */ (get_first_child(clone));
			var end = /** @type {TemplateNode} */ (clone.lastChild);
 
			assign_nodes(start, end);
		} else {
			assign_nodes(clone, clone);
		}
 
		return clone;
	};
}
 
/**
 * @param {string} content
 * @param {number} flags
 * @returns {() => Node | Node[]}
 */
/*#__NO_SIDE_EFFECTS__*/
export function template_with_script(content, flags) {
	var first = true;
	var fn = template(content, flags);
 
	return () => {
		if (hydrating) return fn();
 
		var node = /** @type {Element | DocumentFragment} */ (fn());
 
		if (first) {
			first = false;
			run_scripts(node);
		}
 
		return node;
	};
}
 
/**
 * @param {string} content
 * @param {number} flags
 * @param {'svg' | 'math'} ns
 * @returns {() => Node | Node[]}
 */
/*#__NO_SIDE_EFFECTS__*/
export function ns_template(content, flags, ns = 'svg') {
	/**
	 * Whether or not the first item is a text/element node. If not, we need to
	 * create an additional comment node to act as `effect.nodes.start`
	 */
	var has_start = !content.startsWith('<!>');
 
	var is_fragment = (flags & TEMPLATE_FRAGMENT) !== 0;
	var wrapped = `<${ns}>${has_start ? content : '<!>' + content}</${ns}>`;
 
	/** @type {Element | DocumentFragment} */
	var node;
 
	return () => {
		if (hydrating) {
			assign_nodes(hydrate_node, null);
			return hydrate_node;
		}
 
		if (!node) {
			var fragment = /** @type {DocumentFragment} */ (create_fragment_from_html(wrapped));
			var root = /** @type {Element} */ (get_first_child(fragment));
 
			if (is_fragment) {
				node = document.createDocumentFragment();
				while (get_first_child(root)) {
					node.appendChild(/** @type {Node} */ (get_first_child(root)));
				}
			} else {
				node = /** @type {Element} */ (get_first_child(root));
			}
		}
 
		var clone = /** @type {TemplateNode} */ (node.cloneNode(true));
 
		if (is_fragment) {
			var start = /** @type {TemplateNode} */ (get_first_child(clone));
			var end = /** @type {TemplateNode} */ (clone.lastChild);
 
			assign_nodes(start, end);
		} else {
			assign_nodes(clone, clone);
		}
 
		return clone;
	};
}
 
/**
 * @param {string} content
 * @param {number} flags
 * @returns {() => Node | Node[]}
 */
/*#__NO_SIDE_EFFECTS__*/
export function svg_template_with_script(content, flags) {
	var first = true;
	var fn = ns_template(content, flags);

	return () => {
		if (hydrating) return fn();

		var node = /** @type {Element | DocumentFragment} */ (fn());

		if (first) {
			first = false;
			run_scripts(node);
		}

		return node;
	};
}
 
/**
 * @param {string} content
 * @param {number} flags
 * @returns {() => Node | Node[]}
 */
/*#__NO_SIDE_EFFECTS__*/
export function mathml_template(content, flags) {
	return ns_template(content, flags, 'math');
}
 
/**
 * Creating a document fragment from HTML that contains script tags will not execute
 * the scripts. We need to replace the script tags with new ones so that they are executed.
 * @param {Element | DocumentFragment} node
 */
function run_scripts(node) {
	// scripts were SSR'd, in which case they will run
	if (hydrating) return;
 
	const scripts =
		/** @type {HTMLElement} */ (node).tagName === 'SCRIPT'
			? [/** @type {HTMLScriptElement} */ (node)]
			: node.querySelectorAll('script');
	for (const script of scripts) {
		var clone = document.createElement('script');
		for (var attribute of script.attributes) {
			clone.setAttribute(attribute.name, attribute.value);
		}
 
		clone.textContent = script.textContent;
 
		// If node === script tag, replaceWith will do nothing because there's no parent yet,
		// waiting until that's the case using an effect solves this.
		// Don't do it in other circumstances or we could accidentally execute scripts
		// in an adjacent @html tag that was instantiated in the meantime.
		if (script === node) {
			queue_micro_task(() => script.replaceWith(clone));
		} else {
			script.replaceWith(clone);
		}
	}
}
 
/**
 * Don't mark this as side-effect-free, hydration needs to walk all nodes
 * @param {any} value
 */
export function text(value = '') {
	if (!hydrating) {
		var t = create_text(value + '');
		assign_nodes(t, t);
		return t;
	}
 
	var node = hydrate_node;
 
	if (node.nodeType !== 3) {
		// if an {expression} is empty during SSR, we need to insert an empty text node
		node.before((node = create_text()));
		set_hydrate_node(node);
	}
 
	assign_nodes(node, node);
	return node;
}
 
export function comment() {
	// we're not delegating to `template` here for performance reasons
	if (hydrating) {
		assign_nodes(hydrate_node, null);
		return hydrate_node;
	}
 
	var frag = document.createDocumentFragment();
	var start = document.createComment('');
	var anchor = create_text();
	frag.append(start, anchor);
 
	assign_nodes(start, anchor);
 
	return frag;
}
 
/**
 * Assign the created (or in hydration mode, traversed) dom elements to the current block
 * and insert the elements into the dom (in client mode).
 * @param {Text | Comment | Element} anchor
 * @param {DocumentFragment | Element} dom
 */
export function append(anchor, dom) {
	if (hydrating) {
		/** @type {Effect} */ (current_effect).nodes_end = hydrate_node;
		hydrate_next();
		return;
	}
 
	if (anchor === null) {
		// edge case — void `<svelte:element>` with content
		return;
	}
 
	anchor.before(/** @type {Node} */ (dom));
}