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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 3805x 3805x 3805x 3805x 107x 107x 107x 107x 107x 107x 107x 3805x 3805x 3x 3x 3x 3802x 3805x 3x 3x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 12x 12x 12x 12x 12x 12x 3802x 3802x 3805x 2558x 10x 10x 2558x 3802x 3805x 2558x 1478x 1478x 1x 1x 1478x 1478x 34x 34x 1478x 1478x 146x 1478x 87x 87x 1478x 1391x 7x 7x 1391x 7x 7x 2558x 97x 97x 97x 97x 1x 1x 1078x 22x 982x 33x 961x 428x 428x 428x 428x 428x 428x 928x 490x 301x 81x 81x 301x 135x 135x 135x 219x 85x 85x 80x 85x 7x 7x 490x 490x 490x 2558x 3802x 3805x 7x 7x 3802x 3805x 201x 201x 3802x 3805x 10x 10x 3802x 3805x 33x 33x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3805x 96x 1x 1x 96x 96x 96x 96x 96x 96x 96x 96x 96x 3805x 3706x 1415x 267x 267x 267x 267x 267x 267x 1148x 1415x 120x 120x 120x 1028x 1028x 1415x 1415x 1018x 1415x 854x 854x 854x 854x 851x 851x 851x 851x 851x 851x 851x 851x 851x 854x 177x 177x 1396x 1415x 1415x 1415x 3706x 3802x 3802x 3805x 2x 2x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3804x 3805x 3805x 3805x 1x 1x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3802x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 3805x 10x 10x 3802x 3802x 3802x 3802x 3805x 3805x 3805x 3805x 3805x 70x 70x 70x 3805x 3732x 3732x 3732x 3732x 3732x 3732x 3732x 3732x 3732x 3732x 3x 3x 3x 3x 3732x 3732x 3732x 3732x 3732x 3732x 3732x 1921x 1921x 3732x 3802x 3805x 3x 3x 3x 3x 3x 3x 3x 3805x 1864x 1864x 1864x 1864x 3802x 3805x 3802x 3805x 1x 1x 1x 3802x 3805x 3502x 3502x 3805x 2x 2x 2x 2x 2x 2x 2x 33x 33x 31x 31x 31x 4x 4x 31x 31x 31x 31x 31x 53x 53x 53x 53x 53x 22x 22x 53x 31x 31x 31x 31x 31x 31x 22x 22x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 31x 2x 2x 2x 2x 2x 2x 2x 2x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 160x 63x 63x 63x 63x 63x 63x 63x 1x 63x 1x 1x 1x 62x 62x 63x 7x 7x 63x 7x 7x 7x 7x 63x 55x 55x 160x 97x 97x 159x 159x 160x 160x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 6x 96x 90x 90x 96x 96x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 96x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 170x 170x 170x 170x 170x 170x 170x 170x 3x 3x 3x 167x 167x 167x 167x 170x 47x 47x 47x 47x 47x 47x 47x 170x 9x 120x 2x 111x 11x 109x 98x 98x 98x 98x 98x 98x 98x 98x 98x 98x 98x 167x 170x 134x 10x 132x 124x 124x 134x 170x 33x 33x 33x 170x 2x 2x 2x 2x 2x 2x 2x 2x 7x 7x 7x 7x 7x 7x 7x 7x 2x 1x 1x 1x 1x 2x 7x 5x 5x 5x 7x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 120x 5x 5x 5x 5x 5x 5x 5x 120x 120x 120x 120x 5x 5x 120x 120x 56x 56x 56x 56x 56x 56x 56x 56x 56x 56x 56x 56x 120x 64x 64x 64x 120x | /** @import { Expression, ExpressionStatement, Identifier, MemberExpression, ObjectExpression, Statement } from 'estree' */
/** @import { Ast } from '#compiler' */
/** @import { SourceLocation } from '#shared' */
/** @import { ComponentClientTransformState, ComponentContext } from '../types' */
/** @import { Scope } from '../../../scope' */
import {
is_boolean_attribute,
is_dom_property,
is_load_error_element,
is_void
} from '../../../../../utils.js';
import { escape_html } from '../../../../../escaping.js';
import { dev, is_ignored, locator } from '../../../../state.js';
import {
get_attribute_expression,
is_event_attribute,
is_text_attribute
} from '../../../../utils/ast.js';
import * as b from '../../../../utils/builders.js';
import { is_custom_element_node } from '../../../nodes.js';
import { clean_nodes, determine_namespace_for_children } from '../../utils.js';
import { build_getter } from '../utils.js';
import {
get_attribute_name,
build_attribute_value,
build_class_directives,
build_style_directives
} from './shared/element.js';
import { process_children } from './shared/fragment.js';
import {
build_render_statement,
build_template_literal,
build_update,
build_update_assignment
} from './shared/utils.js';
import { visit_event_attribute } from './shared/events.js';
/**
* @param {Ast.RegularElement} node
* @param {ComponentContext} context
*/
export function RegularElement(node, context) {
/** @type {SourceLocation} */
let location = [-1, -1];
if (dev) {
const loc = locator(node.start);
if (loc) {
location[0] = loc.line;
location[1] = loc.column;
context.state.locations.push(location);
}
}
if (node.name === 'noscript') {
context.state.template.push('<noscript></noscript>');
return;
}
if (node.name === 'script') {
context.state.metadata.context.template_contains_script_tag = true;
}
const metadata = context.state.metadata;
const child_metadata = {
...context.state.metadata,
namespace: determine_namespace_for_children(node, context.state.metadata.namespace)
};
context.state.template.push(`<${node.name}`);
/** @type {Array<Ast.Attribute | Ast.SpreadAttribute>} */
const attributes = [];
/** @type {Ast.ClassDirective[]} */
const class_directives = [];
/** @type {Ast.StyleDirective[]} */
const style_directives = [];
/** @type {ExpressionStatement[]} */
const lets = [];
const is_custom_element = is_custom_element_node(node);
let needs_input_reset = false;
let needs_content_reset = false;
/** @type {Ast.BindDirective | null} */
let value_binding = null;
/** If true, needs `__value` for inputs */
let needs_special_value_handling = node.name === 'option' || node.name === 'select';
let is_content_editable = false;
let has_content_editable_binding = false;
let img_might_be_lazy = false;
let might_need_event_replaying = false;
let has_direction_attribute = false;
let has_style_attribute = false;
if (is_custom_element) {
// cloneNode is faster, but it does not instantiate the underlying class of the
// custom element until the template is connected to the dom, which would
// cause problems when setting properties on the custom element.
// Therefore we need to use importNode instead, which doesn't have this caveat.
metadata.context.template_needs_import_node = true;
}
// visit let directives first, to set state
for (const attribute of node.attributes) {
if (attribute.type === 'LetDirective') {
lets.push(/** @type {ExpressionStatement} */ (context.visit(attribute)));
}
}
for (const attribute of node.attributes) {
if (attribute.type === 'Attribute') {
attributes.push(attribute);
if (node.name === 'img' && attribute.name === 'loading') {
img_might_be_lazy = true;
}
if (attribute.name === 'dir') {
has_direction_attribute = true;
}
if (attribute.name === 'style') {
has_style_attribute = true;
}
if (
(attribute.name === 'value' || attribute.name === 'checked') &&
!is_text_attribute(attribute)
) {
needs_input_reset = true;
needs_content_reset = true;
} else if (
attribute.name === 'contenteditable' &&
(attribute.value === true ||
(is_text_attribute(attribute) && attribute.value[0].data === 'true'))
) {
is_content_editable = true;
}
} else if (attribute.type === 'SpreadAttribute') {
attributes.push(attribute);
needs_input_reset = true;
needs_content_reset = true;
if (is_load_error_element(node.name)) {
might_need_event_replaying = true;
}
} else if (attribute.type === 'ClassDirective') {
class_directives.push(attribute);
} else if (attribute.type === 'StyleDirective') {
style_directives.push(attribute);
} else if (attribute.type === 'OnDirective') {
const handler = /** @type {Expression} */ (context.visit(attribute));
const has_action_directive = node.attributes.find((a) => a.type === 'UseDirective');
context.state.after_update.push(
b.stmt(has_action_directive ? b.call('$.effect', b.thunk(handler)) : handler)
);
} else if (attribute.type !== 'LetDirective') {
if (attribute.type === 'BindDirective') {
if (attribute.name === 'group' || attribute.name === 'checked') {
needs_special_value_handling = true;
needs_input_reset = true;
} else if (attribute.name === 'value') {
value_binding = attribute;
needs_content_reset = true;
needs_input_reset = true;
} else if (
attribute.name === 'innerHTML' ||
attribute.name === 'innerText' ||
attribute.name === 'textContent'
) {
has_content_editable_binding = true;
}
} else if (attribute.type === 'UseDirective' && is_load_error_element(node.name)) {
might_need_event_replaying = true;
}
context.visit(attribute);
}
}
if (is_content_editable && has_content_editable_binding) {
child_metadata.bound_contenteditable = true;
}
if (needs_input_reset && node.name === 'input') {
context.state.init.push(b.stmt(b.call('$.remove_input_defaults', context.state.node)));
}
if (needs_content_reset && node.name === 'textarea') {
context.state.init.push(b.stmt(b.call('$.remove_textarea_child', context.state.node)));
}
if (value_binding !== null && node.name === 'select') {
setup_select_synchronization(value_binding, context);
}
const node_id = context.state.node;
// Let bindings first, they can be used on attributes
context.state.init.push(...lets);
// Then do attributes
let is_attributes_reactive = false;
if (node.metadata.has_spread) {
if (node.name === 'img') {
img_might_be_lazy = true;
}
build_element_spread_attributes(
attributes,
context,
node,
node_id,
// If value binding exists, that one takes care of calling $.init_select
value_binding === null && node.name === 'select'
);
is_attributes_reactive = true;
} else {
for (const attribute of /** @type {Ast.Attribute[]} */ (attributes)) {
if (is_event_attribute(attribute)) {
if (
(attribute.name === 'onload' || attribute.name === 'onerror') &&
is_load_error_element(node.name)
) {
might_need_event_replaying = true;
}
visit_event_attribute(attribute, context);
continue;
}
if (needs_special_value_handling && attribute.name === 'value') {
build_element_special_value_attribute(node.name, node_id, attribute, context);
continue;
}
if (
!is_custom_element &&
attribute.name !== 'autofocus' &&
(attribute.value === true || is_text_attribute(attribute))
) {
const name = get_attribute_name(node, attribute, context);
const value = is_text_attribute(attribute) ? attribute.value[0].data : true;
if (name !== 'class' || value) {
context.state.template.push(
` ${attribute.name}${
is_boolean_attribute(name) && value === true
? ''
: `="${value === true ? '' : escape_html(value, true)}"`
}`
);
continue;
}
}
const is = is_custom_element
? build_custom_element_attribute_update_assignment(node_id, attribute, context)
: build_element_attribute_update_assignment(node, node_id, attribute, context);
if (is) is_attributes_reactive = true;
}
}
// Apply the src and loading attributes for <img> elements after the element is appended to the document
if (img_might_be_lazy) {
context.state.after_update.push(b.stmt(b.call('$.handle_lazy_img', node_id)));
}
// class/style directives must be applied last since they could override class/style attributes
build_class_directives(class_directives, node_id, context, is_attributes_reactive);
build_style_directives(
style_directives,
node_id,
context,
is_attributes_reactive,
has_style_attribute || node.metadata.has_spread
);
if (might_need_event_replaying) {
context.state.after_update.push(b.stmt(b.call('$.replay_events', node_id)));
}
context.state.template.push('>');
/** @type {SourceLocation[]} */
const child_locations = [];
/** @type {ComponentClientTransformState} */
const state = {
...context.state,
metadata: child_metadata,
locations: child_locations,
scope: /** @type {Scope} */ (context.state.scopes.get(node.fragment)),
preserve_whitespace:
context.state.preserve_whitespace || node.name === 'pre' || node.name === 'textarea'
};
const { hoisted, trimmed } = clean_nodes(
node,
node.fragment.nodes,
context.path,
child_metadata.namespace,
state,
node.name === 'script' || state.preserve_whitespace,
state.options.preserveComments
);
/** Whether or not we need to wrap the children in `{...}` to avoid declaration conflicts */
const has_declaration = node.fragment.nodes.some((node) => node.type === 'SnippetBlock');
/** @type {typeof state} */
const child_state = { ...state, init: [], update: [], after_update: [] };
for (const node of hoisted) {
context.visit(node, child_state);
}
// special case — if an element that only contains text, we don't need
// to descend into it if the text is non-reactive
const text_content =
trimmed.every((node) => node.type === 'Text' || node.type === 'ExpressionTag') &&
trimmed.some((node) => node.type === 'ExpressionTag') &&
build_template_literal(trimmed, context.visit, child_state);
if (text_content && !text_content.has_state) {
child_state.init.push(
b.stmt(b.assignment('=', b.member(context.state.node, 'textContent'), text_content.value))
);
} else {
/** @type {Expression} */
let arg = context.state.node;
// If `hydrate_node` is set inside the element, we need to reset it
// after the element has been hydrated
let needs_reset = trimmed.some((node) => node.type !== 'Text');
// The same applies if it's a `<template>` element, since we need to
// set the value of `hydrate_node` to `node.content`
if (node.name === 'template') {
needs_reset = true;
child_state.init.push(b.stmt(b.call('$.hydrate_template', arg)));
arg = b.member(arg, 'content');
}
process_children(trimmed, () => b.call('$.child', arg), true, {
...context,
state: child_state
});
if (needs_reset) {
child_state.init.push(b.stmt(b.call('$.reset', context.state.node)));
}
}
if (has_declaration) {
context.state.init.push(
b.block([
...child_state.init,
child_state.update.length > 0 ? build_render_statement(child_state.update) : b.empty,
...child_state.after_update
])
);
} else if (node.fragment.metadata.dynamic) {
context.state.init.push(...child_state.init);
context.state.update.push(...child_state.update);
context.state.after_update.push(...child_state.after_update);
}
if (has_direction_attribute) {
// This fixes an issue with Chromium where updates to text content within an element
// does not update the direction when set to auto. If we just re-assign the dir, this fixes it.
const dir = b.member(node_id, 'dir');
context.state.update.push(b.stmt(b.assignment('=', dir, dir)));
}
if (child_locations.length > 0) {
// @ts-expect-error
location.push(child_locations);
}
if (!is_void(node.name)) {
context.state.template.push(`</${node.name}>`);
}
}
/**
* Special case: if we have a value binding on a select element, we need to set up synchronization
* between the value binding and inner signals, for indirect updates
* @param {Ast.BindDirective} value_binding
* @param {ComponentContext} context
*/
function setup_select_synchronization(value_binding, context) {
if (context.state.analysis.runes) return;
let bound = value_binding.expression;
while (bound.type === 'MemberExpression') {
bound = /** @type {Identifier | MemberExpression} */ (bound.object);
}
/** @type {string[]} */
const names = [];
for (const [name, refs] of context.state.scope.references) {
if (
refs.length > 0 &&
// prevent infinite loop
name !== bound.name
) {
names.push(name);
}
}
const invalidator = b.call(
'$.invalidate_inner_signals',
b.thunk(
b.block(
names.map((name) => {
const serialized = build_getter(b.id(name), context.state);
return b.stmt(serialized);
})
)
)
);
context.state.init.push(
b.stmt(
b.call(
'$.template_effect',
b.thunk(
b.block([
b.stmt(/** @type {Expression} */ (context.visit(value_binding.expression))),
b.stmt(invalidator)
])
)
)
)
);
}
/**
* @param {Array<Ast.Attribute | Ast.SpreadAttribute>} attributes
* @param {ComponentContext} context
* @param {Ast.RegularElement} element
* @param {Identifier} element_id
* @param {boolean} needs_select_handling
*/
function build_element_spread_attributes(
attributes,
context,
element,
element_id,
needs_select_handling
) {
let needs_isolation = false;
/** @type {ObjectExpression['properties']} */
const values = [];
for (const attribute of attributes) {
if (attribute.type === 'Attribute') {
const name = get_attribute_name(element, attribute, context);
// TODO: handle has_call
const { value } = build_attribute_value(attribute.value, context);
if (
name === 'is' &&
value.type === 'Literal' &&
context.state.metadata.namespace === 'html'
) {
context.state.template.push(` is="${escape_html(value.value, true)}"`);
continue;
}
if (
is_event_attribute(attribute) &&
(get_attribute_expression(attribute).type === 'ArrowFunctionExpression' ||
get_attribute_expression(attribute).type === 'FunctionExpression')
) {
// Give the event handler a stable ID so it isn't removed and readded on every update
const id = context.state.scope.generate('event_handler');
context.state.init.push(b.var(id, value));
values.push(b.init(attribute.name, b.id(id)));
} else {
values.push(b.init(name, value));
}
} else {
values.push(b.spread(/** @type {Expression} */ (context.visit(attribute))));
}
needs_isolation ||=
attribute.type === 'SpreadAttribute' && attribute.metadata.expression.has_call;
}
const preserve_attribute_case =
element.metadata.svg || element.metadata.mathml || is_custom_element_node(element);
const id = b.id(context.state.scope.generate('attributes'));
const update = b.stmt(
b.assignment(
'=',
id,
b.call(
'$.set_attributes',
element_id,
id,
b.object(values),
context.state.analysis.css.hash !== '' && b.literal(context.state.analysis.css.hash),
preserve_attribute_case && b.true,
is_ignored(element, 'hydration_attribute_changed') && b.true
)
)
);
context.state.init.push(b.let(id));
// objects could contain reactive getters -> play it safe and always assume spread attributes are reactive
if (needs_isolation) {
context.state.init.push(build_update(update));
} else {
context.state.update.push(update);
}
if (needs_select_handling) {
context.state.init.push(
b.stmt(b.call('$.init_select', element_id, b.thunk(b.member(id, 'value'))))
);
context.state.update.push(
b.if(
b.binary('in', b.literal('value'), id),
b.block([
// This ensures a one-way street to the DOM in case it's <select {value}>
// and not <select bind:value>. We need it in addition to $.init_select
// because the select value is not reflected as an attribute, so the
// mutation observer wouldn't notice.
b.stmt(b.call('$.select_option', element_id, b.member(id, 'value')))
])
)
);
}
}
/**
* Serializes an assignment to an element property by adding relevant statements to either only
* the init or the the init and update arrays, depending on whether or not the value is dynamic.
* Resulting code for static looks something like this:
* ```js
* element.property = value;
* // or
* $.set_attribute(element, property, value);
* });
* ```
* Resulting code for dynamic looks something like this:
* ```js
* let value;
* $.template_effect(() => {
* if (value !== (value = 'new value')) {
* element.property = value;
* // or
* $.set_attribute(element, property, value);
* }
* });
* ```
* Returns true if attribute is deemed reactive, false otherwise.
* @param {Ast.RegularElement} element
* @param {Identifier} node_id
* @param {Ast.Attribute} attribute
* @param {ComponentContext} context
* @returns {boolean}
*/
function build_element_attribute_update_assignment(element, node_id, attribute, context) {
const state = context.state;
const name = get_attribute_name(element, attribute, context);
const is_svg = context.state.metadata.namespace === 'svg' || element.name === 'svg';
const is_mathml = context.state.metadata.namespace === 'mathml';
let { has_call, value } = build_attribute_value(attribute.value, context);
if (name === 'autofocus') {
state.init.push(b.stmt(b.call('$.autofocus', node_id, value)));
return false;
}
/** @type {Statement} */
let update;
if (name === 'class') {
update = b.stmt(
b.call(
is_svg ? '$.set_svg_class' : is_mathml ? '$.set_mathml_class' : '$.set_class',
node_id,
value
)
);
} else if (name === 'value') {
update = b.stmt(b.call('$.set_value', node_id, value));
} else if (name === 'checked') {
update = b.stmt(b.call('$.set_checked', node_id, value));
} else if (is_dom_property(name)) {
update = b.stmt(b.assignment('=', b.member(node_id, name), value));
} else {
const callee = name.startsWith('xlink') ? '$.set_xlink_attribute' : '$.set_attribute';
update = b.stmt(
b.call(
callee,
node_id,
b.literal(name),
value,
is_ignored(element, 'hydration_attribute_changed') && b.true
)
);
}
if (attribute.metadata.expression.has_state) {
if (has_call) {
state.init.push(build_update(update));
} else {
state.update.push(update);
}
return true;
} else {
state.init.push(update);
return false;
}
}
/**
* Like `build_element_attribute_update_assignment` but without any special attribute treatment.
* @param {Identifier} node_id
* @param {Ast.Attribute} attribute
* @param {ComponentContext} context
* @returns {boolean}
*/
function build_custom_element_attribute_update_assignment(node_id, attribute, context) {
const state = context.state;
const name = attribute.name; // don't lowercase, as we set the element's property, which might be case sensitive
let { has_call, value } = build_attribute_value(attribute.value, context);
const update = b.stmt(b.call('$.set_custom_element_data', node_id, b.literal(name), value));
if (attribute.metadata.expression.has_state) {
if (has_call) {
state.init.push(build_update(update));
} else {
state.update.push(update);
}
return true;
} else {
state.init.push(update);
return false;
}
}
/**
* Serializes an assignment to the value property of a `<select>`, `<option>` or `<input>` element
* that needs the hidden `__value` property.
* Returns true if attribute is deemed reactive, false otherwise.
* @param {string} element
* @param {Identifier} node_id
* @param {Ast.Attribute} attribute
* @param {ComponentContext} context
* @returns {boolean}
*/
function build_element_special_value_attribute(element, node_id, attribute, context) {
const state = context.state;
const { value } = build_attribute_value(attribute.value, context);
const inner_assignment = b.assignment(
'=',
b.member(node_id, 'value'),
b.conditional(
b.binary('==', b.literal(null), b.assignment('=', b.member(node_id, '__value'), value)),
b.literal(''), // render null/undefined values as empty string to support placeholder options
value
)
);
const is_select_with_value =
// attribute.metadata.dynamic would give false negatives because even if the value does not change,
// the inner options could still change, so we need to always treat it as reactive
element === 'select' && attribute.value !== true && !is_text_attribute(attribute);
const update = b.stmt(
is_select_with_value
? b.sequence([
inner_assignment,
// This ensures a one-way street to the DOM in case it's <select {value}>
// and not <select bind:value>. We need it in addition to $.init_select
// because the select value is not reflected as an attribute, so the
// mutation observer wouldn't notice.
b.call('$.select_option', node_id, value)
])
: inner_assignment
);
if (is_select_with_value) {
state.init.push(b.stmt(b.call('$.init_select', node_id, b.thunk(value))));
}
if (attribute.metadata.expression.has_state) {
const id = state.scope.generate(`${node_id.name}_value`);
build_update_assignment(
state,
id,
// `<option>` is a special case: The value property reflects to the DOM. If the value is set to undefined,
// that means the value should be set to the empty string. To be able to do that when the value is
// initially undefined, we need to set a value that is guaranteed to be different.
element === 'option' ? b.object([]) : undefined,
value,
update
);
return true;
} else {
state.init.push(update);
return false;
}
}
|