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9x 9x 9x 9x 9x 9x 9x 9x 9x | /** @import { AssignmentExpression, BinaryOperator, BlockStatement, CallExpression, Expression, ExpressionStatement, Identifier, MethodDefinition, Node, Pattern, Program, Property, PropertyDefinition, Statement, VariableDeclarator } from 'estree' */
/** @import { Binding, Namespace, SvelteNode, ValidatedCompileOptions, ValidatedModuleCompileOptions } from '#compiler' */
/** @import { ComponentServerTransformState, ComponentVisitors, ServerTransformState, Visitors } from './types.js' */
/** @import { Analysis, ComponentAnalysis } from '../../types.js' */
/** @import { Scope } from '../../scope.js' */
/** @import { StateField } from '../../3-transform/client/types.js' */ // TODO move this type
import { walk } from 'zimmerframe';
import { set_scope, get_rune } from '../../scope.js';
import { extract_identifiers, extract_paths, is_expression_async } from '../../../utils/ast.js';
import * as b from '../../../utils/builders.js';
import is_reference from 'is-reference';
import { transform_inspect_rune } from '../utils.js';
import { filename } from '../../../state.js';
import { render_stylesheet } from '../css/index.js';
import { AwaitBlock } from './visitors/template/AwaitBlock.js';
import { Component } from './visitors/template/Component.js';
import { ConstTag } from './visitors/template/ConstTag.js';
import { DebugTag } from './visitors/template/DebugTag.js';
import { EachBlock } from './visitors/template/EachBlock.js';
import { Fragment } from './visitors/template/Fragment.js';
import { HtmlTag } from './visitors/template/HtmlTag.js';
import { IfBlock } from './visitors/template/IfBlock.js';
import { KeyBlock } from './visitors/template/KeyBlock.js';
import { LetDirective } from './visitors/template/LetDirective.js';
import { RegularElement } from './visitors/template/RegularElement.js';
import { RenderTag } from './visitors/template/RenderTag.js';
import { SlotElement } from './visitors/template/SlotElement.js';
import { SnippetBlock } from './visitors/template/SnippetBlock.js';
import { SpreadAttribute } from './visitors/template/SpreadAttribute.js';
import { SvelteComponent } from './visitors/template/SvelteComponent.js';
import { SvelteElement } from './visitors/template/SvelteElement.js';
import { SvelteFragment } from './visitors/template/SvelteFragment.js';
import { SvelteHead } from './visitors/template/SvelteHead.js';
import { SvelteSelf } from './visitors/template/SvelteSelf.js';
import { TitleElement } from './visitors/template/TitleElement.js';
/**
* @param {VariableDeclarator} declarator
* @param {Scope} scope
* @param {Expression} value
* @returns {VariableDeclarator[]}
*/
function create_state_declarators(declarator, scope, value) {
if (declarator.id.type === 'Identifier') {
return [b.declarator(declarator.id, value)];
}
const tmp = scope.generate('tmp');
const paths = extract_paths(declarator.id);
return [
b.declarator(b.id(tmp), value), // TODO inject declarator for opts, so we can use it below
...paths.map((path) => {
const value = path.expression?.(b.id(tmp));
return b.declarator(path.node, value);
})
];
}
/**
* @param {Identifier} node
* @param {ServerTransformState} state
* @returns {Expression}
*/
function serialize_get_binding(node, state) {
const binding = state.scope.get(node.name);
if (binding === null || node === binding.node) {
// No associated binding or the declaration itself which shouldn't be transformed
return node;
}
if (binding.kind === 'store_sub') {
const store_id = b.id(node.name.slice(1));
return b.call(
'$.store_get',
b.assignment('??=', b.id('$$store_subs'), b.object([])),
b.literal(node.name),
serialize_get_binding(store_id, state)
);
}
if (Object.hasOwn(state.getters, node.name)) {
const getter = state.getters[node.name];
return typeof getter === 'function' ? getter(node) : getter;
}
return node;
}
/**
* @param {AssignmentExpression} node
* @param {Pick<import('zimmerframe').Context<SvelteNode, ServerTransformState>, 'visit' | 'state'>} context
*/
function get_assignment_value(node, { state, visit }) {
if (node.left.type === 'Identifier') {
const operator = node.operator;
return operator === '='
? /** @type {Expression} */ (visit(node.right))
: // turn something like x += 1 into x = x + 1
b.binary(
/** @type {BinaryOperator} */ (operator.slice(0, -1)),
serialize_get_binding(node.left, state),
/** @type {Expression} */ (visit(node.right))
);
}
return /** @type {Expression} */ (visit(node.right));
}
/**
* @param {string} name
*/
function is_store_name(name) {
return name[0] === '$' && /[A-Za-z_]/.test(name[1]);
}
/**
* @param {AssignmentExpression} node
* @param {import('zimmerframe').Context<SvelteNode, ServerTransformState>} context
* @param {() => any} fallback
* @returns {Expression}
*/
function serialize_set_binding(node, context, fallback) {
const { state, visit } = context;
if (
node.left.type === 'ArrayPattern' ||
node.left.type === 'ObjectPattern' ||
node.left.type === 'RestElement'
) {
// Turn assignment into an IIFE, so that `$.set` calls etc don't produce invalid code
const tmp_id = context.state.scope.generate('tmp');
/** @type {AssignmentExpression[]} */
const original_assignments = [];
/** @type {Expression[]} */
const assignments = [];
const paths = extract_paths(node.left);
for (const path of paths) {
const value = path.expression?.(b.id(tmp_id));
const assignment = b.assignment('=', path.node, value);
original_assignments.push(assignment);
assignments.push(serialize_set_binding(assignment, context, () => assignment));
}
if (assignments.every((assignment, i) => assignment === original_assignments[i])) {
// No change to output -> nothing to transform -> we can keep the original assignment
return fallback();
}
return b.call(
b.thunk(
b.block([
b.const(tmp_id, /** @type {Expression} */ (visit(node.right))),
b.stmt(b.sequence(assignments)),
b.return(b.id(tmp_id))
])
)
);
}
if (node.left.type !== 'Identifier' && node.left.type !== 'MemberExpression') {
throw new Error(`Unexpected assignment type ${node.left.type}`);
}
let left = node.left;
while (left.type === 'MemberExpression') {
// @ts-expect-error
left = left.object;
}
if (left.type !== 'Identifier') {
return fallback();
}
const is_store = is_store_name(left.name);
const left_name = is_store ? left.name.slice(1) : left.name;
const binding = state.scope.get(left_name);
if (!binding) return fallback();
if (binding.mutation !== null) {
return binding.mutation(node, context);
}
if (
binding.kind !== 'state' &&
binding.kind !== 'frozen_state' &&
binding.kind !== 'prop' &&
binding.kind !== 'bindable_prop' &&
binding.kind !== 'each' &&
binding.kind !== 'legacy_reactive' &&
!is_store
) {
// TODO error if it's a computed (or rest prop)? or does that already happen elsewhere?
return fallback();
}
const value = get_assignment_value(node, { state, visit });
if (left === node.left) {
if (is_store) {
return b.call('$.store_set', b.id(left_name), /** @type {Expression} */ (visit(node.right)));
}
return fallback();
} else if (is_store) {
return b.call(
'$.mutate_store',
b.assignment('??=', b.id('$$store_subs'), b.object([])),
b.literal(left.name),
b.id(left_name),
b.assignment(node.operator, /** @type {Pattern} */ (visit(node.left)), value)
);
}
return fallback();
}
/** @type {Visitors} */
const global_visitors = {
Identifier(node, { path, state }) {
if (is_reference(node, /** @type {Node} */ (path.at(-1)))) {
if (node.name === '$$props') {
return b.id('$$sanitized_props');
}
return serialize_get_binding(node, state);
}
},
AssignmentExpression(node, context) {
return serialize_set_binding(node, context, context.next);
},
UpdateExpression(node, context) {
const { state, next } = context;
const argument = node.argument;
if (argument.type === 'Identifier' && state.scope.get(argument.name)?.kind === 'store_sub') {
return b.call(
node.prefix ? '$.update_store_pre' : '$.update_store',
b.assignment('??=', b.id('$$store_subs'), b.object([])),
b.literal(argument.name),
b.id(argument.name.slice(1)),
node.operator === '--' && b.literal(-1)
);
}
return next();
},
CallExpression(node, context) {
const rune = get_rune(node, context.state.scope);
if (rune === '$host') {
return b.id('undefined');
}
if (rune === '$effect.tracking') {
return b.literal(false);
}
if (rune === '$effect.root') {
// ignore $effect.root() calls, just return a noop which mimics the cleanup function
return b.arrow([], b.block([]));
}
if (rune === '$state.snapshot') {
return b.call('$.snapshot', /** @type {Expression} */ (context.visit(node.arguments[0])));
}
if (rune === '$state.is') {
return b.call(
'Object.is',
/** @type {Expression} */ (context.visit(node.arguments[0])),
/** @type {Expression} */ (context.visit(node.arguments[1]))
);
}
if (rune === '$inspect' || rune === '$inspect().with') {
return transform_inspect_rune(node, context);
}
context.next();
}
};
/** @type {Visitors} */
const javascript_visitors_runes = {
ClassBody(node, { state, visit }) {
/** @type {Map<string, StateField>} */
const public_derived = new Map();
/** @type {Map<string, StateField>} */
const private_derived = new Map();
/** @type {string[]} */
const private_ids = [];
for (const definition of node.body) {
if (
definition.type === 'PropertyDefinition' &&
(definition.key.type === 'Identifier' || definition.key.type === 'PrivateIdentifier')
) {
const { type, name } = definition.key;
const is_private = type === 'PrivateIdentifier';
if (is_private) private_ids.push(name);
if (definition.value?.type === 'CallExpression') {
const rune = get_rune(definition.value, state.scope);
if (rune === '$derived' || rune === '$derived.by') {
/** @type {StateField} */
const field = {
kind: rune === '$derived.by' ? 'derived_call' : 'derived',
// @ts-expect-error this is set in the next pass
id: is_private ? definition.key : null
};
if (is_private) {
private_derived.set(name, field);
} else {
public_derived.set(name, field);
}
}
}
}
}
// each `foo = $derived()` needs a backing `#foo` field
for (const [name, field] of public_derived) {
let deconflicted = name;
while (private_ids.includes(deconflicted)) {
deconflicted = '_' + deconflicted;
}
private_ids.push(deconflicted);
field.id = b.private_id(deconflicted);
}
/** @type {Array<MethodDefinition | PropertyDefinition>} */
const body = [];
const child_state = { ...state, private_derived };
// Replace parts of the class body
for (const definition of node.body) {
if (
definition.type === 'PropertyDefinition' &&
(definition.key.type === 'Identifier' || definition.key.type === 'PrivateIdentifier')
) {
const name = definition.key.name;
const is_private = definition.key.type === 'PrivateIdentifier';
const field = (is_private ? private_derived : public_derived).get(name);
if (definition.value?.type === 'CallExpression' && field !== undefined) {
const init = /** @type {Expression} **/ (
visit(definition.value.arguments[0], child_state)
);
const value =
field.kind === 'derived_call'
? b.call('$.once', init)
: b.call('$.once', b.thunk(init));
if (is_private) {
body.push(b.prop_def(field.id, value));
} else {
// #foo;
const member = b.member(b.this, field.id);
body.push(b.prop_def(field.id, value));
// get foo() { return this.#foo; }
body.push(b.method('get', definition.key, [], [b.return(b.call(member))]));
if ((field.kind === 'derived' || field.kind === 'derived_call') && state.options.dev) {
body.push(
b.method(
'set',
definition.key,
[b.id('_')],
[b.throw_error(`Cannot update a derived property ('${name}')`)]
)
);
}
}
continue;
}
}
body.push(/** @type {MethodDefinition} **/ (visit(definition, child_state)));
}
return { ...node, body };
},
PropertyDefinition(node, { state, next, visit }) {
if (node.value != null && node.value.type === 'CallExpression') {
const rune = get_rune(node.value, state.scope);
if (rune === '$state' || rune === '$state.frozen' || rune === '$derived') {
return {
...node,
value:
node.value.arguments.length === 0
? null
: /** @type {Expression} */ (visit(node.value.arguments[0]))
};
}
if (rune === '$derived.by') {
return {
...node,
value:
node.value.arguments.length === 0
? null
: b.call(/** @type {Expression} */ (visit(node.value.arguments[0])))
};
}
}
next();
},
VariableDeclaration(node, { state, visit }) {
const declarations = [];
for (const declarator of node.declarations) {
const init = declarator.init;
const rune = get_rune(init, state.scope);
if (!rune || rune === '$effect.tracking' || rune === '$inspect' || rune === '$effect.root') {
declarations.push(/** @type {VariableDeclarator} */ (visit(declarator)));
continue;
}
if (rune === '$props') {
// remove $bindable() from props declaration
const id = walk(declarator.id, null, {
AssignmentPattern(node) {
if (
node.right.type === 'CallExpression' &&
get_rune(node.right, state.scope) === '$bindable'
) {
const right = node.right.arguments.length
? /** @type {Expression} */ (visit(node.right.arguments[0]))
: b.id('undefined');
return b.assignment_pattern(node.left, right);
}
}
});
declarations.push(b.declarator(id, b.id('$$props')));
continue;
}
const args = /** @type {CallExpression} */ (init).arguments;
const value =
args.length === 0 ? b.id('undefined') : /** @type {Expression} */ (visit(args[0]));
if (rune === '$derived.by') {
declarations.push(
b.declarator(/** @type {Pattern} */ (visit(declarator.id)), b.call(value))
);
continue;
}
if (declarator.id.type === 'Identifier') {
declarations.push(b.declarator(declarator.id, value));
continue;
}
if (rune === '$derived') {
declarations.push(b.declarator(/** @type {Pattern} */ (visit(declarator.id)), value));
continue;
}
declarations.push(...create_state_declarators(declarator, state.scope, value));
}
return {
...node,
declarations
};
},
ExpressionStatement(node, context) {
const expression = node.expression;
if (expression.type === 'CallExpression') {
const callee = expression.callee;
if (callee.type === 'Identifier' && callee.name === '$effect') {
return b.empty;
}
if (
callee.type === 'MemberExpression' &&
callee.object.type === 'Identifier' &&
callee.object.name === '$effect'
) {
return b.empty;
}
}
context.next();
},
MemberExpression(node, context) {
if (node.object.type === 'ThisExpression' && node.property.type === 'PrivateIdentifier') {
const field = context.state.private_derived.get(node.property.name);
if (field) {
return b.call(node);
}
}
context.next();
}
};
/** @type {Visitors} */
const javascript_visitors_legacy = {
VariableDeclaration(node, { state, visit }) {
/** @type {VariableDeclarator[]} */
const declarations = [];
for (const declarator of node.declarations) {
const bindings = /** @type {Binding[]} */ (state.scope.get_bindings(declarator));
const has_state = bindings.some((binding) => binding.kind === 'state');
const has_props = bindings.some((binding) => binding.kind === 'bindable_prop');
if (!has_state && !has_props) {
declarations.push(/** @type {VariableDeclarator} */ (visit(declarator)));
continue;
}
if (has_props) {
if (declarator.id.type !== 'Identifier') {
// Turn export let into props. It's really really weird because export let { x: foo, z: [bar]} = ..
// means that foo and bar are the props (i.e. the leafs are the prop names), not x and z.
const tmp = state.scope.generate('tmp');
const paths = extract_paths(declarator.id);
declarations.push(
b.declarator(
b.id(tmp),
/** @type {Expression} */ (visit(/** @type {Expression} */ (declarator.init)))
)
);
for (const path of paths) {
const value = path.expression?.(b.id(tmp));
const name = /** @type {Identifier} */ (path.node).name;
const binding = /** @type {Binding} */ (state.scope.get(name));
const prop = b.member(b.id('$$props'), b.literal(binding.prop_alias ?? name), true);
declarations.push(
b.declarator(path.node, b.call('$.value_or_fallback', prop, b.thunk(value)))
);
}
continue;
}
const binding = /** @type {Binding} */ (state.scope.get(declarator.id.name));
const prop = b.member(
b.id('$$props'),
b.literal(binding.prop_alias ?? declarator.id.name),
true
);
/** @type {Expression} */
let init = prop;
if (declarator.init) {
const default_value = /** @type {Expression} */ (visit(declarator.init));
init = is_expression_async(default_value)
? b.await(b.call('$.value_or_fallback_async', prop, b.thunk(default_value, true)))
: b.call('$.value_or_fallback', prop, b.thunk(default_value));
}
declarations.push(b.declarator(declarator.id, init));
continue;
}
declarations.push(
...create_state_declarators(
declarator,
state.scope,
/** @type {Expression} */ (declarator.init && visit(declarator.init))
)
);
}
return {
...node,
declarations
};
},
LabeledStatement(node, context) {
if (context.path.length > 1) return;
if (node.label.name !== '$') return;
// TODO bail out if we're in module context
// these statements will be topologically ordered later
context.state.legacy_reactive_statements.set(
node,
// people could do "break $" inside, so we need to keep the label
b.labeled('$', /** @type {ExpressionStatement} */ (context.visit(node.body)))
);
return b.empty;
}
};
/** @type {ComponentVisitors} */
const template_visitors = {
AwaitBlock,
Component,
ConstTag,
DebugTag,
EachBlock,
Fragment,
HtmlTag,
IfBlock,
KeyBlock,
LetDirective,
RegularElement,
RenderTag,
SlotElement,
SnippetBlock,
SpreadAttribute,
SvelteComponent,
SvelteElement,
SvelteFragment,
SvelteHead,
SvelteSelf,
TitleElement
};
/**
* @param {ComponentAnalysis} analysis
* @param {ValidatedCompileOptions} options
* @returns {Program}
*/
export function server_component(analysis, options) {
/** @type {ComponentServerTransformState} */
const state = {
analysis,
options,
scope: analysis.module.scope,
scopes: analysis.template.scopes,
hoisted: [b.import_all('$', 'svelte/internal/server')],
legacy_reactive_statements: new Map(),
// these are set inside the `Fragment` visitor, and cannot be used until then
init: /** @type {any} */ (null),
template: /** @type {any} */ (null),
namespace: options.namespace,
preserve_whitespace: options.preserveWhitespace,
private_derived: new Map(),
getters: {},
skip_hydration_boundaries: false
};
const module = /** @type {Program} */ (
walk(
/** @type {SvelteNode} */ (analysis.module.ast),
state,
// @ts-expect-error TODO: zimmerframe types
{
...set_scope(analysis.module.scopes),
...global_visitors,
...(analysis.runes ? javascript_visitors_runes : javascript_visitors_legacy)
}
)
);
const instance = /** @type {Program} */ (
walk(
/** @type {SvelteNode} */ (analysis.instance.ast),
{ ...state, scope: analysis.instance.scope },
// @ts-expect-error TODO: zimmerframe types
{
...set_scope(analysis.instance.scopes),
...global_visitors,
...(analysis.runes ? javascript_visitors_runes : javascript_visitors_legacy),
ImportDeclaration(node) {
state.hoisted.push(node);
return b.empty;
},
ExportNamedDeclaration(node, context) {
if (node.declaration) {
return context.visit(node.declaration);
}
return b.empty;
}
}
)
);
const template = /** @type {Program} */ (
walk(
/** @type {SvelteNode} */ (analysis.template.ast),
{ ...state, scope: analysis.template.scope },
// @ts-expect-error TODO: zimmerframe types
{
...set_scope(analysis.template.scopes),
...global_visitors,
...template_visitors
}
)
);
/** @type {VariableDeclarator[]} */
const legacy_reactive_declarations = [];
for (const [node] of analysis.reactive_statements) {
const statement = [...state.legacy_reactive_statements].find(([n]) => n === node);
if (statement === undefined) {
throw new Error('Could not find reactive statement');
}
if (
node.body.type === 'ExpressionStatement' &&
node.body.expression.type === 'AssignmentExpression'
) {
for (const id of extract_identifiers(node.body.expression.left)) {
const binding = analysis.instance.scope.get(id.name);
if (binding?.kind === 'legacy_reactive') {
legacy_reactive_declarations.push(b.declarator(id));
}
}
}
instance.body.push(statement[1]);
}
if (legacy_reactive_declarations.length > 0) {
instance.body.unshift({
type: 'VariableDeclaration',
kind: 'let',
declarations: legacy_reactive_declarations
});
}
// If the component binds to a child, we need to put the template in a loop and repeat until legacy bindings are stable.
// We can remove this once the legacy syntax is gone.
if (analysis.uses_component_bindings) {
const snippets = template.body.filter(
(node) =>
node.type === 'FunctionDeclaration' &&
// @ts-expect-error
node.___snippet
);
const rest = template.body.filter(
(node) =>
node.type !== 'FunctionDeclaration' ||
// @ts-expect-error
!node.___snippet
);
template.body = [
...snippets,
b.let('$$settled', b.true),
b.let('$$inner_payload'),
b.stmt(
b.function(
b.id('$$render_inner'),
[b.id('$$payload')],
b.block(/** @type {Statement[]} */ (rest))
)
),
b.do_while(
b.unary('!', b.id('$$settled')),
b.block([
b.stmt(b.assignment('=', b.id('$$settled'), b.true)),
b.stmt(
b.assignment('=', b.id('$$inner_payload'), b.call('$.copy_payload', b.id('$$payload')))
),
b.stmt(b.call('$$render_inner', b.id('$$inner_payload')))
])
),
b.stmt(b.call('$.assign_payload', b.id('$$payload'), b.id('$$inner_payload')))
];
}
if (
[...analysis.instance.scope.declarations.values()].some(
(binding) => binding.kind === 'store_sub'
)
) {
instance.body.unshift(b.var('$$store_subs'));
template.body.push(
b.if(b.id('$$store_subs'), b.stmt(b.call('$.unsubscribe_stores', b.id('$$store_subs'))))
);
}
// Propagate values of bound props upwards if they're undefined in the parent and have a value.
// Don't do this as part of the props retrieval because people could eagerly mutate the prop in the instance script.
/** @type {Property[]} */
const props = [];
for (const [name, binding] of analysis.instance.scope.declarations) {
if (binding.kind === 'bindable_prop' && !name.startsWith('$$')) {
props.push(b.init(binding.prop_alias ?? name, b.id(name)));
}
}
for (const { name, alias } of analysis.exports) {
props.push(b.init(alias ?? name, b.id(name)));
}
if (props.length > 0) {
// This has no effect in runes mode other than throwing an error when someone passes
// undefined to a binding that has a default value.
template.body.push(b.stmt(b.call('$.bind_props', b.id('$$props'), b.object(props))));
}
/** @type {Expression[]} */
const push_args = [];
if (options.dev) push_args.push(b.id(analysis.name));
const component_block = b.block([
.../** @type {Statement[]} */ (instance.body),
.../** @type {Statement[]} */ (template.body)
]);
let should_inject_context = analysis.needs_context || options.dev;
if (should_inject_context) {
component_block.body.unshift(b.stmt(b.call('$.push', ...push_args)));
component_block.body.push(b.stmt(b.call('$.pop')));
}
if (analysis.uses_rest_props) {
/** @type {string[]} */
const named_props = analysis.exports.map(({ name, alias }) => alias ?? name);
for (const [name, binding] of analysis.instance.scope.declarations) {
if (binding.kind === 'bindable_prop') named_props.push(binding.prop_alias ?? name);
}
component_block.body.unshift(
b.const(
'$$restProps',
b.call(
'$.rest_props',
b.id('$$sanitized_props'),
b.array(named_props.map((name) => b.literal(name)))
)
)
);
}
if (analysis.uses_props || analysis.uses_rest_props) {
component_block.body.unshift(
b.const('$$sanitized_props', b.call('$.sanitize_props', b.id('$$props')))
);
}
if (analysis.uses_slots) {
component_block.body.unshift(b.const('$$slots', b.call('$.sanitize_slots', b.id('$$props'))));
}
const body = [...state.hoisted, ...module.body];
if (analysis.css.ast !== null && options.css === 'injected' && !options.customElement) {
const hash = b.literal(analysis.css.hash);
const code = b.literal(render_stylesheet(analysis.source, analysis, options).code);
body.push(b.const('$$css', b.object([b.init('hash', hash), b.init('code', code)])));
component_block.body.unshift(b.stmt(b.call('$$payload.css.add', b.id('$$css'))));
}
let should_inject_props =
should_inject_context ||
props.length > 0 ||
analysis.needs_props ||
analysis.uses_props ||
analysis.uses_rest_props ||
analysis.uses_slots ||
analysis.slot_names.size > 0;
const component_function = b.function_declaration(
b.id(analysis.name),
should_inject_props ? [b.id('$$payload'), b.id('$$props')] : [b.id('$$payload')],
component_block
);
if (options.compatibility.componentApi === 4) {
body.unshift(b.imports([['render', '$$_render']], 'svelte/server'));
body.push(
component_function,
b.stmt(
b.assignment(
'=',
b.member_id(`${analysis.name}.render`),
b.function(
null,
[b.id('$$props'), b.id('$$opts')],
b.block([
b.return(
b.call(
'$$_render',
b.id(analysis.name),
b.object([
b.init('props', b.id('$$props')),
b.init('context', b.member(b.id('$$opts'), b.id('context'), false, true))
])
)
)
])
)
)
),
b.export_default(b.id(analysis.name))
);
} else if (options.dev) {
body.push(
component_function,
b.stmt(
b.assignment(
'=',
b.member_id(`${analysis.name}.render`),
b.function(
null,
[],
b.block([
b.throw_error(
`Component.render(...) is no longer valid in Svelte 5. ` +
'See https://svelte-5-preview.vercel.app/docs/breaking-changes#components-are-no-longer-classes for more information'
)
])
)
)
),
b.export_default(b.id(analysis.name))
);
} else {
body.push(b.export_default(component_function));
}
if (options.dev && filename) {
// add `App[$.FILENAME] = 'App.svelte'` so that we can print useful messages later
body.unshift(
b.stmt(
b.assignment(
'=',
b.member(b.id(analysis.name), b.id('$.FILENAME'), true),
b.literal(filename)
)
)
);
}
return {
type: 'Program',
sourceType: 'module',
body
};
}
/**
* @param {Analysis} analysis
* @param {ValidatedModuleCompileOptions} options
* @returns {Program}
*/
export function server_module(analysis, options) {
/** @type {ServerTransformState} */
const state = {
analysis,
options,
scope: analysis.module.scope,
scopes: analysis.module.scopes,
// this is an anomaly — it can only be used in components, but it needs
// to be present for `javascript_visitors_legacy` and so is included in module
// transform state as well as component transform state
legacy_reactive_statements: new Map(),
private_derived: new Map(),
getters: {}
};
const module = /** @type {Program} */ (
walk(/** @type {SvelteNode} */ (analysis.module.ast), state, {
...set_scope(analysis.module.scopes),
...global_visitors,
...javascript_visitors_runes
})
);
return {
type: 'Program',
sourceType: 'module',
body: [b.import_all('$', 'svelte/internal/server'), ...module.body]
};
}
|