All files / src/internal/server index.js

100% Statements 540/540
97.47% Branches 116/119
100% Functions 28/28
100% Lines 540/540

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 5581x 1x 1x   1x 1x         1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 187x 187x 187x 187x 187x 187x 187x 187x 187x 1x 1x 1x 1x 1x 1x 1x 1x 158x 158x 158x 1x 1x 1x 1x 1x 1x 1x 1x 1x 137x 137x 137x 131x 131x 131x 131x 131x 115x 115x 110x 110x 115x 115x 131x 137x 137x 137x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 2841x 2841x 2841x 2841x 2841x 2841x 2841x 2841x 2841x 2841x 2841x 2841x 2841x 1x 1x 1x 2841x 2841x 2841x 2841x 2841x 1x 1x 2820x 2820x 2841x 2820x 2820x 2820x 2820x 2841x 3x 3x 2820x 2820x 2820x 2820x 2820x 2820x 2820x 1x 1x 1x 1x 1x 1x 1x 33x 33x 33x 33x 33x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1541x 1541x 1541x 1541x 1541x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 26x 26x 26x 24x 26x 2x 2x 26x 26x 9x 9x 26x 26x 26x 26x 24x 26x 2x 2x 26x 1x 1x 1x 1x 1x 1x 1x 1x 1x 196x 9x 9x 9x 9x 196x 196x 12x 12x 12x 14x 14x 14x 14x 12x 12x 12x 196x 196x 196x 196x 196x 196x 196x 196x 330x 330x 330x 330x 301x 328x 282x 282x 301x 330x 330x 196x 196x 196x 1x 1x 1x 1x 1x 1x 59x 59x 59x 59x 59x 110x 110x 178x 178x 110x 59x 59x 1x 1x 1x 1x 1x 1x 219x 219x 1x 1x 89x 89x 89x 89x 89x 89x 1x 1x 1x 54x 54x 54x 1x 1x 1x 1x 1x 1x 19x 19x 19x 19x 17x 27x 27x 27x 27x 27x 27x 17x 19x 19x 22x 22x 19x 19x 19x 1x 1x 1x 1x 1x 1x 1x 1x 1x 394x 394x 394x 392x 392x 392x 394x 124x 124x 268x 394x 394x 394x 394x 394x 394x 394x 394x 394x 1x 1x 1x 1x 1x 1x 1x 1x 1x 50x 50x 50x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 8x 8x 8x 1x 1x 1x 1x 1x 1x 1x 1x 1x 4x 4x 4x 4x 1x 1x 1x 1x 1x 1x 1x 1x 1x 4x 4x 4x 4x 1x 1x 1x 170x 264x 264x 170x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 572x 572x 572x 196x 196x 572x 572x 532x 572x 40x 40x 572x 1x 1x 1x 1x 1x 1x 1x 19x 19x 19x 19x 39x 22x 22x 39x 19x 19x 1x 1x 1x 1x 1x 1x 45x 45x 45x 1x 1x 1x 1x 1x 1x 8x 8x 8x 8x 12x 12x 6x 6x 1x 1x 1x 1x 1x 1x 1x 1x 2163x 4355x 4355x 4355x 4355x 4355x 2054x 4355x 34x 34x 4355x 2163x 1x 1x 1x 1x 1x 1x 1x 1x 125x 125x 98x 98x 98x 98x 125x 27x 27x 125x 1x   1x 1x 1x 796x 794x 794x 794x 794x 2x 2x 1x 1x 1x 1x 1x 1x 1x 19x 19x 1x 1x 1x 1x 1x 1x 18x 18x 17x 15x 15x 17x 18x 18x 1x   1x   1x   1x   1x   1x           1x    
/** @import { ComponentType, SvelteComponent } from 'svelte' */
/** @import { Component, Payload, RenderOutput } from '#server' */
/** @import { Store } from '#shared' */
export { FILENAME, HMR } from '../../constants.js';
import { is_promise, noop } from '../shared/utils.js';
import { subscribe_to_store } from '../../store/utils.js';
import {
	UNINITIALIZED,
	ELEMENT_PRESERVE_ATTRIBUTE_CASE,
	ELEMENT_IS_NAMESPACED
} from '../../constants.js';
 
import { escape_html } from '../../escaping.js';
import { DEV } from 'esm-env';
import { current_component, pop, push } from './context.js';
import { EMPTY_COMMENT, BLOCK_CLOSE, BLOCK_OPEN } from './hydration.js';
import { validate_store } from '../shared/validate.js';
import { is_boolean_attribute, is_void } from '../../utils.js';
import { reset_elements } from './dev.js';
 
// https://html.spec.whatwg.org/multipage/syntax.html#attributes-2
// https://infra.spec.whatwg.org/#noncharacter
const INVALID_ATTR_NAME_CHAR_REGEX =
	/[\s'">/=\u{FDD0}-\u{FDEF}\u{FFFE}\u{FFFF}\u{1FFFE}\u{1FFFF}\u{2FFFE}\u{2FFFF}\u{3FFFE}\u{3FFFF}\u{4FFFE}\u{4FFFF}\u{5FFFE}\u{5FFFF}\u{6FFFE}\u{6FFFF}\u{7FFFE}\u{7FFFF}\u{8FFFE}\u{8FFFF}\u{9FFFE}\u{9FFFF}\u{AFFFE}\u{AFFFF}\u{BFFFE}\u{BFFFF}\u{CFFFE}\u{CFFFF}\u{DFFFE}\u{DFFFF}\u{EFFFE}\u{EFFFF}\u{FFFFE}\u{FFFFF}\u{10FFFE}\u{10FFFF}]/u;
 
/** List of elements that require raw contents and should not have SSR comments put in them */
const RAW_TEXT_ELEMENTS = ['textarea', 'script', 'style', 'title'];
 
/**
 * @param {Payload} to_copy
 * @returns {Payload}
 */
export function copy_payload({ out, css, head }) {
	return {
		out,
		css: new Set(css),
		head: {
			title: head.title,
			out: head.out
		}
	};
}
 
/**
 * Assigns second payload to first
 * @param {Payload} p1
 * @param {Payload} p2
 * @returns {void}
 */
export function assign_payload(p1, p2) {
	p1.out = p2.out;
	p1.head = p2.head;
}
 
/**
 * @param {Payload} payload
 * @param {string} tag
 * @param {() => void} attributes_fn
 * @param {() => void} children_fn
 * @returns {void}
 */
export function element(payload, tag, attributes_fn = noop, children_fn = noop) {
	payload.out += '<!---->';
 
	if (tag) {
		payload.out += `<${tag} `;
		attributes_fn();
		payload.out += `>`;
 
		if (!is_void(tag)) {
			children_fn();
			if (!RAW_TEXT_ELEMENTS.includes(tag)) {
				payload.out += EMPTY_COMMENT;
			}
			payload.out += `</${tag}>`;
		}
	}
 
	payload.out += '<!---->';
}
 
/**
 * Array of `onDestroy` callbacks that should be called at the end of the server render function
 * @type {Function[]}
 */
export let on_destroy = [];
 
/**
 * Only available on the server and when compiling with the `server` option.
 * Takes a component and returns an object with `body` and `head` properties on it, which you can use to populate the HTML when server-rendering your app.
 * @template {Record<string, any>} Props
 * @param {import('svelte').Component<Props> | ComponentType<SvelteComponent<Props>>} component
 * @param {{ props?: Omit<Props, '$$slots' | '$$events'>; context?: Map<any, any> }} [options]
 * @returns {RenderOutput}
 */
export function render(component, options = {}) {
	/** @type {Payload} */
	const payload = { out: '', css: new Set(), head: { title: '', out: '' } };
 
	const prev_on_destroy = on_destroy;
	on_destroy = [];
	payload.out += BLOCK_OPEN;
 
	if (DEV) {
		// prevent parent/child element state being corrupted by a bad render
		reset_elements();
	}
 
	if (options.context) {
		push();
		/** @type {Component} */ (current_component).c = options.context;
	}
 
	// @ts-expect-error
	component(payload, options.props ?? {}, {}, {});
 
	if (options.context) {
		pop();
	}
 
	payload.out += BLOCK_CLOSE;
	for (const cleanup of on_destroy) cleanup();
	on_destroy = prev_on_destroy;
 
	let head = payload.head.out + payload.head.title;
 
	for (const { hash, code } of payload.css) {
		head += `<style id="${hash}">${code}</style>`;
	}
 
	return {
		head,
		html: payload.out,
		body: payload.out
	};
}
 
/**
 * @param {Payload} payload
 * @param {(head_payload: Payload['head']) => void} fn
 * @returns {void}
 */
export function head(payload, fn) {
	const head_payload = payload.head;
	head_payload.out += BLOCK_OPEN;
	fn(head_payload);
	head_payload.out += BLOCK_CLOSE;
}
 
/**
 * `<div translate={false}>` should be rendered as `<div translate="no">` and _not_
 * `<div translate="false">`, which is equivalent to `<div translate="yes">`. There
 * may be other odd cases that need to be added to this list in future
 * @type {Record<string, Map<any, string>>}
 */
const replacements = {
	translate: new Map([
		[true, 'yes'],
		[false, 'no']
	])
};
 
/**
 * @template V
 * @param {string} name
 * @param {V} value
 * @param {boolean} [is_boolean]
 * @returns {string}
 */
export function attr(name, value, is_boolean = false) {
	if (value == null || (!value && is_boolean) || (value === '' && name === 'class')) return '';
	const normalized = (name in replacements && replacements[name].get(value)) || value;
	const assignment = is_boolean ? '' : `="${escape_html(normalized, true)}"`;
	return ` ${name}${assignment}`;
}
 
/**
 * @param {Payload} payload
 * @param {boolean} is_html
 * @param {Record<string, string>} props
 * @param {() => void} component
 * @param {boolean} dynamic
 * @returns {void}
 */
export function css_props(payload, is_html, props, component, dynamic = false) {
	const styles = style_object_to_string(props);
 
	if (is_html) {
		payload.out += `<svelte-css-wrapper style="display: contents; ${styles}">`;
	} else {
		payload.out += `<g style="${styles}">`;
	}
 
	if (dynamic) {
		payload.out += '<!---->';
	}
 
	component();
 
	if (is_html) {
		payload.out += `<!----></svelte-css-wrapper>`;
	} else {
		payload.out += `<!----></g>`;
	}
}
 
/**
 * @param {Record<string, unknown>} attrs
 * @param {Record<string, string>} [classes]
 * @param {Record<string, string>} [styles]
 * @param {number} [flags]
 * @returns {string}
 */
export function spread_attributes(attrs, classes, styles, flags = 0) {
	if (styles) {
		attrs.style = attrs.style
			? style_object_to_string(merge_styles(/** @type {string} */ (attrs.style), styles))
			: style_object_to_string(styles);
	}
 
	if (classes) {
		const classlist = attrs.class ? [attrs.class] : [];
 
		for (const key in classes) {
			if (classes[key]) {
				classlist.push(key);
			}
		}
 
		attrs.class = classlist.join(' ');
	}
 
	let attr_str = '';
	let name;
 
	const is_html = (flags & ELEMENT_IS_NAMESPACED) === 0;
	const lowercase = (flags & ELEMENT_PRESERVE_ATTRIBUTE_CASE) === 0;
 
	for (name in attrs) {
		// omit functions, internal svelte properties and invalid attribute names
		if (typeof attrs[name] === 'function') continue;
		if (name[0] === '$' && name[1] === '$') continue; // faster than name.startsWith('$$')
		if (INVALID_ATTR_NAME_CHAR_REGEX.test(name)) continue;
 
		if (lowercase) {
			name = name.toLowerCase();
		}
 
		attr_str += attr(name, attrs[name], is_html && is_boolean_attribute(name));
	}
 
	return attr_str;
}
 
/**
 * @param {Record<string, unknown>[]} props
 * @returns {Record<string, unknown>}
 */
export function spread_props(props) {
	/** @type {Record<string, unknown>} */
	const merged_props = {};
	let key;
 
	for (let i = 0; i < props.length; i++) {
		const obj = props[i];
		for (key in obj) {
			merged_props[key] = obj[key];
		}
	}
	return merged_props;
}
 
/**
 * @param {unknown} value
 * @returns {string}
 */
export function stringify(value) {
	return typeof value === 'string' ? value : value == null ? '' : value + '';
}
 
/** @param {Record<string, string>} style_object */
function style_object_to_string(style_object) {
	return Object.keys(style_object)
		.filter(/** @param {any} key */ (key) => style_object[key] != null && style_object[key] !== '')
		.map(/** @param {any} key */ (key) => `${key}: ${escape_html(style_object[key], true)};`)
		.join(' ');
}
 
/** @param {Record<string, string>} style_object */
export function add_styles(style_object) {
	const styles = style_object_to_string(style_object);
	return styles ? ` style="${styles}"` : '';
}
 
/**
 * @param {string} attribute
 * @param {Record<string, string>} styles
 */
export function merge_styles(attribute, styles) {
	/** @type {Record<string, string>} */
	var merged = {};
 
	if (attribute) {
		for (var declaration of attribute.split(';')) {
			var i = declaration.indexOf(':');
			var name = declaration.slice(0, i).trim();
			var value = declaration.slice(i + 1).trim();
 
			if (name !== '') merged[name] = value;
		}
	}
 
	for (name in styles) {
		merged[name] = styles[name];
	}
 
	return merged;
}
 
/**
 * @template V
 * @param {Record<string, [any, any, any]>} store_values
 * @param {string} store_name
 * @param {Store<V> | null | undefined} store
 * @returns {V}
 */
export function store_get(store_values, store_name, store) {
	if (DEV) {
		validate_store(store, store_name.slice(1));
	}
 
	// it could be that someone eagerly updates the store in the instance script, so
	// we should only reuse the store value in the template
	if (store_name in store_values && store_values[store_name][0] === store) {
		return store_values[store_name][2];
	}
 
	store_values[store_name]?.[1](); // if store was switched, unsubscribe from old store
	store_values[store_name] = [store, null, undefined];
	const unsub = subscribe_to_store(
		store,
		/** @param {any} v */ (v) => (store_values[store_name][2] = v)
	);
	store_values[store_name][1] = unsub;
	return store_values[store_name][2];
}
 
/**
 * Sets the new value of a store and returns that value.
 * @template V
 * @param {Store<V>} store
 * @param {V} value
 * @returns {V}
 */
export function store_set(store, value) {
	store.set(value);
	return value;
}
 
/**
 * Updates a store with a new value.
 * @template V
 * @param {Record<string, [any, any, any]>} store_values
 * @param {string} store_name
 * @param {Store<V>} store
 * @param {any} expression
 */
export function store_mutate(store_values, store_name, store, expression) {
	store_set(store, store_get(store_values, store_name, store));
	return expression;
}
 
/**
 * @param {Record<string, [any, any, any]>} store_values
 * @param {string} store_name
 * @param {Store<number>} store
 * @param {1 | -1} [d]
 * @returns {number}
 */
export function update_store(store_values, store_name, store, d = 1) {
	let store_value = store_get(store_values, store_name, store);
	store.set(store_value + d);
	return store_value;
}
 
/**
 * @param {Record<string, [any, any, any]>} store_values
 * @param {string} store_name
 * @param {Store<number>} store
 * @param {1 | -1} [d]
 * @returns {number}
 */
export function update_store_pre(store_values, store_name, store, d = 1) {
	const value = store_get(store_values, store_name, store) + d;
	store.set(value);
	return value;
}
 
/** @param {Record<string, [any, any, any]>} store_values */
export function unsubscribe_stores(store_values) {
	for (const store_name in store_values) {
		store_values[store_name][1]();
	}
}
 
/**
 * @param {Payload} payload
 * @param {Record<string, any>} $$props
 * @param {string} name
 * @param {Record<string, unknown>} slot_props
 * @param {null | (() => void)} fallback_fn
 * @returns {void}
 */
export function slot(payload, $$props, name, slot_props, fallback_fn) {
	var slot_fn = $$props.$$slots?.[name];
	// Interop: Can use snippets to fill slots
	if (slot_fn === true) {
		slot_fn = $$props[name === 'default' ? 'children' : name];
	}
 
	if (slot_fn !== undefined) {
		slot_fn(payload, slot_props);
	} else {
		fallback_fn?.();
	}
}
 
/**
 * @param {Record<string, unknown>} props
 * @param {string[]} rest
 * @returns {Record<string, unknown>}
 */
export function rest_props(props, rest) {
	/** @type {Record<string, unknown>} */
	const rest_props = {};
	let key;
	for (key in props) {
		if (!rest.includes(key)) {
			rest_props[key] = props[key];
		}
	}
	return rest_props;
}
 
/**
 * @param {Record<string, unknown>} props
 * @returns {Record<string, unknown>}
 */
export function sanitize_props(props) {
	const { children, $$slots, ...sanitized } = props;
	return sanitized;
}
 
/**
 * @param {Record<string, any>} props
 * @returns {Record<string, boolean>}
 */
export function sanitize_slots(props) {
	/** @type {Record<string, boolean>} */
	const sanitized = {};
	if (props.children) sanitized.default = true;
	for (const key in props.$$slots) {
		sanitized[key] = true;
	}
	return sanitized;
}
 
/**
 * Legacy mode: If the prop has a fallback and is bound in the
 * parent component, propagate the fallback value upwards.
 * @param {Record<string, unknown>} props_parent
 * @param {Record<string, unknown>} props_now
 */
export function bind_props(props_parent, props_now) {
	for (const key in props_now) {
		const initial_value = props_parent[key];
		const value = props_now[key];
		if (
			initial_value === undefined &&
			value !== undefined &&
			Object.getOwnPropertyDescriptor(props_parent, key)?.set
		) {
			props_parent[key] = value;
		}
	}
}
 
/**
 * @template V
 * @param {Promise<V>} promise
 * @param {null | (() => void)} pending_fn
 * @param {(value: V) => void} then_fn
 * @returns {void}
 */
function await_block(promise, pending_fn, then_fn) {
	if (is_promise(promise)) {
		promise.then(null, noop);
		if (pending_fn !== null) {
			pending_fn();
		}
	} else if (then_fn !== null) {
		then_fn(promise);
	}
}
 
export { await_block as await };
 
/** @param {any} array_like_or_iterator */
export function ensure_array_like(array_like_or_iterator) {
	if (array_like_or_iterator) {
		return array_like_or_iterator.length !== undefined
			? array_like_or_iterator
			: Array.from(array_like_or_iterator);
	}
	return [];
}
 
/**
 * @param {any[]} args
 * @param {Function} [inspect]
 */
// eslint-disable-next-line no-console
export function inspect(args, inspect = console.log) {
	inspect('init', ...args);
}
 
/**
 * @template V
 * @param {() => V} get_value
 */
export function once(get_value) {
	let value = /** @type {V} */ (UNINITIALIZED);
	return () => {
		if (value === UNINITIALIZED) {
			value = get_value();
		}
		return value;
	};
}
 
export { html } from './blocks/html.js';
 
export { push, pop } from './context.js';
 
export { push_element, pop_element } from './dev.js';
 
export { snapshot } from '../shared/clone.js';
 
export { fallback } from '../shared/utils.js';
 
export {
	invalid_default_snippet,
	validate_dynamic_element_tag,
	validate_void_dynamic_element
} from '../shared/validate.js';
 
export { escape_html as escape };