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2786x 167x 167x 167x 167x 167x 5401x 13289x 9x 9x 5392x 5392x 13289x 13289x 3721x 13289x 1764x 1764x 3628x 3628x 3628x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1709x 1709x 1709x 1709x 1709x 1709x 1657x 1709x 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 1657x 1709x 1657x 1657x 1709x 481x 481x 38x 481x 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 481x 467x 467x 23x 467x 11x 11x 11x 11x 11x 11x 11x 10x 11x 9x 9x 9x 9x 9x 9x 9x 9x 9x 11x 481x 1637x 1637x 1637x 1709x 25x 25x 1612x 1612x 1612x 1709x 1606x 1709x 64x 64x 1542x 1709x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1540x 1540x 1709x 1709x 1709x 1709x 1709x 1709x 1709x 1709x 1709x 326x 1709x 260x 260x 260x 1280x 1280x 1280x 1280x 1280x 1076x 1076x 612x 612x 612x 1076x 1076x 321x 1076x 42x 755x 713x 713x 629x 629x 629x 629x 629x 246x 629x 629x 629x 713x 1x 1x 1x 1x 1x 1x 1x 1x 1x 84x 83x 18x 83x 18x 18x 18x 18x 2x 18x 18x 18x 83x 65x 65x 713x 713x 29x 713x 684x 684x 713x 1280x 204x 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 204x 119x 54x 54x 54x 54x 54x 54x 54x 54x 54x 54x 54x 119x 65x 65x 65x 65x 65x 65x 65x 65x 65x 65x 180x 61x 61x 61x 61x 61x 61x 204x 1280x 1280x 1709x 1x 1x 1279x 1279x 1279x 2x 2x 2x 2x 2x 2x 2x 145x 145x 15x 15x 15x 15x 15x 15x 15x 15x 145x 145x 2x 2x 2x 2x 2x 2x 1151x 1151x 1151x 1151x 1151x 146x 146x 146x 146x 1151x 1005x 1005x 1151x 1151x 133x 133x 133x 133x 133x 133x 133x 133x 1018x 1018x 1018x 2x 2x 2x 2x 2x 2x 152x 152x 152x 152x 152x 152x 152x 152x 152x 152x 152x 169x 168x 168x 169x 152x 152x 225x 225x 225x 163x 6x 6x 6x 6x 6x 6x 163x 163x 163x 163x 163x 163x 163x 163x 163x 1x 163x 1x 163x 162x 162x 162x 162x 14x 162x 14x 162x 148x 148x 148x 163x 225x 152x 152x 2x 2x 2x 2x 2x 2x 2x 152x 152x 152x 152x 152x 152x 152x 141x 130x 130x 130x 152x 11x 11x 11x 11x 152x 152x 152x 152x 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 1315x 1315x 1315x 1315x 1315x 1315x 1315x 1315x 663x 1315x 697x 697x 1315x 63x 63x 63x 63x 63x 63x 63x 63x 63x 10x 63x 10x 10x 63x 608x 608x 2x 2x 2x 2x 2x 2x 2x 2x 2x 870x 699x 699x 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; } |