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2786x 173x 173x 173x 173x 173x 5423x 13343x 9x 9x 5414x 5414x 13343x 13343x 3737x 13343x 1770x 1770x 3644x 3644x 3644x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1713x 1713x 1713x 1713x 1713x 1713x 1661x 1713x 52x 52x 52x 52x 52x 52x 52x 52x 52x 52x 52x 52x 99x 99x 99x 99x 99x 52x 52x 2x 2x 2x 50x 50x 50x 50x 50x 52x 52x 52x 52x 52x 52x 52x 52x 52x 52x 52x 52x 52x 52x 21x 52x 29x 29x 52x 1661x 1713x 1661x 1661x 1713x 482x 482x 38x 482x 14x 14x 14x 12x 5x 5x 5x 5x 5x 5x 4x 4x 4x 4x 4x 4x 4x 4x 4x 12x 7x 7x 7x 7x 7x 7x 7x 4x 4x 7x 7x 7x 12x 482x 468x 468x 23x 468x 11x 11x 11x 11x 11x 11x 11x 10x 11x 9x 9x 9x 9x 9x 9x 9x 9x 9x 11x 482x 1641x 1641x 1641x 1713x 25x 25x 1616x 1616x 1616x 1713x 1610x 1713x 64x 64x 1546x 1713x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1544x 1544x 1713x 1713x 1713x 1713x 1713x 1713x 1713x 1713x 1713x 326x 1713x 260x 260x 260x 1284x 1284x 1284x 1284x 1284x 1079x 1079x 615x 615x 615x 1079x 1079x 321x 1079x 42x 758x 716x 716x 632x 632x 632x 632x 632x 247x 632x 632x 632x 716x 1x 1x 1x 1x 1x 1x 1x 1x 1x 84x 83x 18x 83x 18x 18x 18x 18x 2x 18x 18x 18x 83x 65x 65x 716x 716x 29x 716x 687x 687x 716x 1284x 205x 24x 24x 24x 24x 24x 24x 24x 24x 24x 57x 33x 33x 33x 33x 33x 33x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 57x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 24x 205x 119x 54x 54x 54x 54x 54x 54x 54x 54x 54x 54x 54x 119x 65x 65x 65x 65x 65x 65x 65x 65x 65x 65x 181x 62x 62x 62x 62x 62x 62x 205x 1284x 1284x 1713x 1x 1x 1283x 1283x 1283x 2x 2x 2x 2x 2x 2x 2x 146x 146x 16x 16x 16x 16x 16x 16x 16x 16x 146x 146x 2x 2x 2x 2x 2x 2x 1159x 1159x 1159x 1159x 1159x 147x 147x 147x 147x 1159x 1012x 1012x 1159x 1159x 134x 134x 134x 134x 134x 134x 134x 134x 1025x 1025x 1025x 2x 2x 2x 2x 2x 2x 154x 154x 154x 154x 154x 154x 154x 154x 154x 154x 154x 170x 169x 169x 170x 154x 154x 228x 228x 228x 164x 6x 6x 6x 6x 6x 6x 164x 164x 164x 164x 164x 164x 164x 164x 164x 1x 164x 1x 164x 163x 163x 163x 163x 15x 163x 15x 163x 148x 148x 148x 164x 228x 154x 154x 2x 2x 2x 2x 2x 2x 2x 154x 154x 154x 154x 154x 154x 154x 143x 131x 131x 131x 154x 11x 11x 11x 11x 154x 154x 154x 154x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1989x 1989x 1989x 1989x 1989x 1989x 52x 52x 1989x 1989x 44x 44x 1989x 1989x 1989x 75x 1989x 1924x 1924x 1989x 1989x 1989x 1989x 1989x 1002x 1002x 776x 1002x 226x 226x 226x 19x 226x 10x 226x 216x 216x 226x 226x 226x 1002x 1989x 1989x 1970x 1970x 1970x 1989x 1989x 1989x 2x 2x 2x 2x 2x 2x 1322x 1322x 1322x 1322x 1322x 1322x 1322x 1322x 668x 1322x 699x 699x 1322x 64x 64x 64x 64x 64x 64x 64x 64x 64x 10x 64x 10x 10x 64x 613x 613x 2x 2x 2x 2x 2x 2x 2x 2x 2x 872x 701x 701x 171x 171x | import * as b from '../../../utils/builders.js'; import { extract_paths, is_expression_async, is_simple_expression, object } from '../../../utils/ast.js'; import { PROPS_IS_LAZY_INITIAL, PROPS_IS_IMMUTABLE, PROPS_IS_RUNES, PROPS_IS_UPDATED } from '../../../../constants.js'; /** * @template {import('./types').ClientTransformState} State * @param {import('estree').AssignmentExpression} node * @param {import('zimmerframe').Context<import('#compiler').SvelteNode, State>} context * @returns */ export function get_assignment_value(node, { state, visit }) { if (node.left.type === 'Identifier') { const operator = node.operator; return operator === '=' ? /** @type {import('estree').Expression} */ (visit(node.right)) : // turn something like x += 1 into x = x + 1 b.binary( /** @type {import('estree').BinaryOperator} */ (operator.slice(0, -1)), serialize_get_binding(node.left, state), /** @type {import('estree').Expression} */ (visit(node.right)) ); } else if ( node.left.type === 'MemberExpression' && node.left.object.type === 'ThisExpression' && node.left.property.type === 'PrivateIdentifier' && state.private_state.has(node.left.property.name) ) { const operator = node.operator; return operator === '=' ? /** @type {import('estree').Expression} */ (visit(node.right)) : // turn something like x += 1 into x = x + 1 b.binary( /** @type {import('estree').BinaryOperator} */ (operator.slice(0, -1)), /** @type {import('estree').Expression} */ (visit(node.left)), /** @type {import('estree').Expression} */ (visit(node.right)) ); } else { return /** @type {import('estree').Expression} */ (visit(node.right)); } } /** * @param {import('#compiler').Binding} binding * @param {import('./types').ClientTransformState} state * @returns {boolean} */ export function is_state_source(binding, state) { return ( (binding.kind === 'state' || binding.kind === 'frozen_state') && (!state.analysis.immutable || binding.reassigned || state.analysis.accessors) ); } /** * @param {import('estree').Identifier} node * @param {import('./types').ClientTransformState} state * @returns {import('estree').Expression} */ export 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.node.name === '$$props') { // Special case for $$props which only exists in the old world return b.id('$$sanitized_props'); } if (binding.kind === 'store_sub') { return b.call(node); } if (binding.expression) { return typeof binding.expression === 'function' ? binding.expression(node) : binding.expression; } if (binding.kind === 'prop' || binding.kind === 'bindable_prop') { if (!state.analysis.runes || binding.reassigned || binding.initial) { return b.call(node); } if (binding.prop_alias) { const key = b.key(binding.prop_alias); return b.member(b.id('$$props'), key, key.type === 'Literal'); } return b.member(b.id('$$props'), node); } if (binding.kind === 'legacy_reactive_import') { return b.call('$$_import_' + node.name); } if ( is_state_source(binding, state) || binding.kind === 'derived' || binding.kind === 'legacy_reactive' ) { return b.call('$.get', node); } return node; } /** * @template {import('./types').ClientTransformState} State * @param {import('estree').AssignmentExpression} node * @param {import('zimmerframe').Context<import('#compiler').SvelteNode, State>} context * @param {() => any} fallback * @param {{skip_proxy_and_freeze?: boolean}} [options] * @returns {import('estree').Expression} */ export function serialize_set_binding(node, context, fallback, options) { const { state, visit } = context; const assignee = node.left; if ( assignee.type === 'ArrayPattern' || assignee.type === 'ObjectPattern' || assignee.type === 'RestElement' ) { // Turn assignment into an IIFE, so that `$.set` calls etc don't produce invalid code const tmp_id = context.state.scope.generate('tmp'); /** @type {import('estree').AssignmentExpression[]} */ const original_assignments = []; /** @type {import('estree').Expression[]} */ const assignments = []; const paths = extract_paths(assignee); 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, options)); } if (assignments.every((assignment, i) => assignment === original_assignments[i])) { // No change to output -> nothing to transform -> we can keep the original assignment return fallback(); } const rhs_expression = /** @type {import('estree').Expression} */ (visit(node.right)); const iife_is_async = is_expression_async(rhs_expression) || assignments.some((assignment) => is_expression_async(assignment)); const iife = b.arrow( [], b.block([ b.const(tmp_id, rhs_expression), b.stmt(b.sequence(assignments)), // return because it could be used in a nested expression where the value is needed. // example: { foo: ({ bar } = { bar: 1 })} b.return(b.id(tmp_id)) ]) ); if (iife_is_async) { return b.await(b.call(b.async(iife))); } else { return b.call(iife); } } if (assignee.type !== 'Identifier' && assignee.type !== 'MemberExpression') { throw new Error(`Unexpected assignment type ${assignee.type}`); } // Handle class private/public state assignment cases if (assignee.type === 'MemberExpression') { if ( assignee.object.type === 'ThisExpression' && assignee.property.type === 'PrivateIdentifier' ) { const private_state = context.state.private_state.get(assignee.property.name); const value = get_assignment_value(node, context); if (private_state !== undefined) { if (state.in_constructor) { // See if we should wrap value in $.proxy if ( context.state.analysis.runes && !options?.skip_proxy_and_freeze && should_proxy_or_freeze(value, context.state.scope) ) { const assignment = fallback(); if (assignment.type === 'AssignmentExpression') { assignment.right = private_state.kind === 'frozen_state' ? b.call('$.freeze', value) : serialize_proxy_reassignment(value, private_state.id, state); return assignment; } } } else { return b.call( '$.set', assignee, context.state.analysis.runes && !options?.skip_proxy_and_freeze && should_proxy_or_freeze(value, context.state.scope) ? private_state.kind === 'frozen_state' ? b.call('$.freeze', value) : serialize_proxy_reassignment(value, private_state.id, state) : value ); } } } else if ( assignee.object.type === 'ThisExpression' && assignee.property.type === 'Identifier' && state.in_constructor ) { const public_state = context.state.public_state.get(assignee.property.name); const value = get_assignment_value(node, context); // See if we should wrap value in $.proxy if ( context.state.analysis.runes && public_state !== undefined && !options?.skip_proxy_and_freeze && should_proxy_or_freeze(value, context.state.scope) ) { const assignment = fallback(); if (assignment.type === 'AssignmentExpression') { assignment.right = public_state.kind === 'frozen_state' ? b.call('$.freeze', value) : serialize_proxy_reassignment(value, public_state.id, state); return assignment; } } } } const left = object(assignee); if (left === null) { return fallback(); } const binding = state.scope.get(left.name); if (!binding) return fallback(); if (binding.mutation !== null) { return binding.mutation(node, context); } if (binding.kind === 'legacy_reactive_import') { return b.call( '$$_import_' + binding.node.name, b.assignment( node.operator, /** @type {import('estree').Pattern} */ (visit(node.left)), /** @type {import('estree').Expression} */ (visit(node.right)) ) ); } const is_store = binding.kind === 'store_sub'; const left_name = is_store ? left.name.slice(1) : left.name; 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, context); const serialize = () => { if (left === node.left) { const is_initial_proxy = binding.initial !== null && should_proxy_or_freeze( /**@type {import("estree").Expression}*/ (binding.initial), context.state.scope ); if ((binding.kind === 'prop' || binding.kind === 'bindable_prop') && !is_initial_proxy) { return b.call(left, value); } else if (is_store) { return b.call('$.store_set', serialize_get_binding(b.id(left_name), state), value); } else { let call; if (binding.kind === 'state') { call = b.call( '$.set', b.id(left_name), context.state.analysis.runes && !options?.skip_proxy_and_freeze && should_proxy_or_freeze(value, context.state.scope) ? serialize_proxy_reassignment(value, left_name, state) : value ); } else if (binding.kind === 'frozen_state') { call = b.call( '$.set', b.id(left_name), context.state.analysis.runes && !options?.skip_proxy_and_freeze && should_proxy_or_freeze(value, context.state.scope) ? b.call('$.freeze', value) : value ); } else if ( (binding.kind === 'prop' || binding.kind === 'bindable_prop') && is_initial_proxy ) { call = b.call( left, context.state.analysis.runes && !options?.skip_proxy_and_freeze && should_proxy_or_freeze(value, context.state.scope) ? serialize_proxy_reassignment(value, left_name, state) : value ); } else { call = b.call('$.set', b.id(left_name), value); } if (state.scope.get(`$${left.name}`)?.kind === 'store_sub') { return b.call('$.store_unsub', call, b.literal(`$${left.name}`), b.id('$$subscriptions')); } else { return call; } } } else { if (is_store) { // If we are assigning to a store property, we need to ensure we don't // capture the read for the store as part of the member expression to // keep consistency with how store $ shorthand reads work in Svelte 4. /** * * @param {import("estree").Expression | import("estree").Pattern} node * @returns {import("estree").Expression} */ function visit_node(node) { if (node.type === 'MemberExpression') { return { ...node, object: visit_node(/** @type {import("estree").Expression} */ (node.object)), property: /** @type {import("estree").MemberExpression} */ (visit(node)).property }; } if (node.type === 'Identifier') { const binding = state.scope.get(node.name); if (binding !== null && binding.kind === 'store_sub') { return b.call( '$.untrack', b.thunk(/** @type {import('estree').Expression} */ (visit(node))) ); } } return /** @type {import("estree").Expression} */ (visit(node)); } return b.call( '$.mutate_store', serialize_get_binding(b.id(left_name), state), b.assignment( node.operator, /** @type {import("estree").Pattern}} */ (visit_node(node.left)), value ), b.call('$.untrack', b.id('$' + left_name)) ); } else if (!state.analysis.runes) { if (binding.kind === 'bindable_prop') { return b.call( left, b.sequence([ b.assignment( node.operator, /** @type {import('estree').Pattern} */ (visit(node.left)), value ), b.call(left) ]) ); } else { return b.call( '$.mutate', b.id(left_name), b.assignment( node.operator, /** @type {import('estree').Pattern} */ (visit(node.left)), value ) ); } } else { return b.assignment( node.operator, /** @type {import('estree').Pattern} */ (visit(node.left)), /** @type {import('estree').Expression} */ (visit(node.right)) ); } } }; if (value.type === 'BinaryExpression' && /** @type {any} */ (value.operator) === '??') { return b.logical('??', serialize_get_binding(b.id(left_name), state), serialize()); } return serialize(); } /** * @param {import('estree').Expression} value * @param {import('estree').PrivateIdentifier | string} proxy_reference * @param {import('./types').ClientTransformState} state */ export function serialize_proxy_reassignment(value, proxy_reference, state) { return state.options.dev ? b.call( '$.proxy', value, b.true, b.null, typeof proxy_reference === 'string' ? b.id(proxy_reference) : b.member(b.this, proxy_reference) ) : b.call('$.proxy', value); } /** * @param {import('estree').ArrowFunctionExpression | import('estree').FunctionExpression} node * @param {import('./types').ComponentContext} context */ export const function_visitor = (node, context) => { const metadata = node.metadata; let state = context.state; if (node.type === 'FunctionExpression') { const parent = /** @type {import('estree').Node} */ (context.path.at(-1)); const in_constructor = parent.type === 'MethodDefinition' && parent.kind === 'constructor'; state = { ...context.state, in_constructor }; } else { state = { ...context.state, in_constructor: false }; } if (metadata?.hoistable === true) { const params = serialize_hoistable_params(node, context); return /** @type {import('estree').FunctionExpression} */ ({ ...node, params, body: context.visit(node.body, state) }); } context.next(state); }; /** * @param {import('estree').FunctionDeclaration | import('estree').FunctionExpression | import('estree').ArrowFunctionExpression} node * @param {import('./types').ComponentContext} context * @returns {import('estree').Pattern[]} */ function get_hoistable_params(node, context) { const scope = context.state.scope; /** @type {import('estree').Identifier[]} */ const params = []; /** * We only want to push if it's not already present to avoid name clashing * @param {import('estree').Identifier} id */ function push_unique(id) { if (!params.find((param) => param.name === id.name)) { params.push(id); } } for (const [reference] of scope.references) { let binding = scope.get(reference); if (binding !== null && !scope.declarations.has(reference) && binding.initial !== node) { if (binding.kind === 'store_sub') { // We need both the subscription for getting the value and the store for updating push_unique(b.id(binding.node.name)); binding = /** @type {import('#compiler').Binding} */ ( scope.get(binding.node.name.slice(1)) ); } if ( // If it's a destructured derived binding, then we can extract the derived signal reference and use that. binding.expression !== null && typeof binding.expression !== 'function' && binding.expression.type === 'MemberExpression' && binding.expression.object.type === 'CallExpression' && binding.expression.object.callee.type === 'Identifier' && binding.expression.object.callee.name === '$.get' && binding.expression.object.arguments[0].type === 'Identifier' ) { push_unique(b.id(binding.expression.object.arguments[0].name)); } else if ( // If we are referencing a simple $$props value, then we need to reference the object property instead (binding.kind === 'prop' || binding.kind === 'bindable_prop') && !binding.reassigned && binding.initial === null && !context.state.analysis.accessors ) { push_unique(b.id('$$props')); } else { // create a copy to remove start/end tags which would mess up source maps push_unique(b.id(binding.node.name)); } } } return params; } /** * @param {import('estree').FunctionDeclaration | import('estree').FunctionExpression | import('estree').ArrowFunctionExpression} node * @param {import('./types').ComponentContext} context * @returns {import('estree').Pattern[]} */ export function serialize_hoistable_params(node, context) { const hoistable_params = get_hoistable_params(node, context); node.metadata.hoistable_params = hoistable_params; /** @type {import('estree').Pattern[]} */ const params = []; if (node.params.length === 0) { if (hoistable_params.length > 0) { // For the event object params.push(b.id('_')); } } else { for (const param of node.params) { params.push(/** @type {import('estree').Pattern} */ (context.visit(param))); } } params.push(...hoistable_params); return params; } /** * @param {import('#compiler').Binding} binding * @param {import('./types').ComponentClientTransformState} state * @param {string} name * @param {import('estree').Expression | null} [initial] * @returns */ export function get_prop_source(binding, state, name, initial) { /** @type {import('estree').Expression[]} */ const args = [b.id('$$props'), b.literal(name)]; let flags = 0; if (state.analysis.immutable) { flags |= PROPS_IS_IMMUTABLE; } if (state.analysis.runes) { flags |= PROPS_IS_RUNES; } if ( state.analysis.accessors || (state.analysis.immutable ? binding.reassigned : binding.mutated) ) { flags |= PROPS_IS_UPDATED; } /** @type {import('estree').Expression | undefined} */ let arg; if (initial) { // To avoid eagerly evaluating the right-hand-side, we wrap it in a thunk if necessary if (is_simple_expression(initial)) { arg = initial; } else { if ( initial.type === 'CallExpression' && initial.callee.type === 'Identifier' && initial.arguments.length === 0 ) { arg = initial.callee; } else { arg = b.thunk(initial); } flags |= PROPS_IS_LAZY_INITIAL; } } if (flags || arg) { args.push(b.literal(flags)); if (arg) args.push(arg); } return b.call('$.prop', ...args); } /** * @param {import('estree').Expression} node * @param {import("../../scope.js").Scope | null} scope */ export function should_proxy_or_freeze(node, scope) { if ( !node || node.type === 'Literal' || node.type === 'TemplateLiteral' || node.type === 'ArrowFunctionExpression' || node.type === 'FunctionExpression' || node.type === 'UnaryExpression' || node.type === 'BinaryExpression' || (node.type === 'Identifier' && node.name === 'undefined') ) { return false; } if (node.type === 'Identifier' && scope !== null) { const binding = scope.get(node.name); // Let's see if the reference is something that can be proxied or frozen if ( binding !== null && !binding.reassigned && binding.initial !== null && binding.initial.type !== 'FunctionDeclaration' && binding.initial.type !== 'ClassDeclaration' && binding.initial.type !== 'ImportDeclaration' && binding.initial.type !== 'EachBlock' ) { return should_proxy_or_freeze(binding.initial, null); } } return true; } /** * Port over the location information from the source to the target identifier. * but keep the target as-is (i.e. a new id is created). * This ensures esrap can generate accurate source maps. * @param {import('estree').Identifier} target * @param {import('estree').Identifier} source */ export function with_loc(target, source) { if (source.loc) { return { ...target, loc: source.loc }; } return target; } |