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/** @import { CompileOptions, CompileResult, ValidatedCompileOptions, ModuleCompileOptions } from '#compiler' */
/** @import { AST } from './public.js' */
import { walk as zimmerframe_walk } from 'zimmerframe';
import { convert } from './legacy.js';
import { parse as parse_acorn } from './phases/1-parse/acorn.js';
import { parse as _parse } from './phases/1-parse/index.js';
import { remove_typescript_nodes } from './phases/1-parse/remove_typescript_nodes.js';
import { analyze_component, analyze_module } from './phases/2-analyze/index.js';
import { transform_component, transform_module } from './phases/3-transform/index.js';
import { validate_component_options, validate_module_options } from './validate-options.js';
import * as state from './state.js';
export { default as preprocess } from './preprocess/index.js';
/**
* `compile` converts your `.svelte` source code into a JavaScript module that exports a component
*
* @param {string} source The component source code
* @param {CompileOptions} options The compiler options
* @returns {CompileResult}
*/
export function compile(source, options) {
source = remove_bom(source);
state.reset_warning_filter(options.warningFilter);
const validated = validate_component_options(options, '');
state.reset(source, validated);
let parsed = _parse(source);
const { customElement: customElementOptions, ...parsed_options } = parsed.options || {};
/** @type {ValidatedCompileOptions} */
const combined_options = {
...validated,
...parsed_options,
customElementOptions
};
if (parsed.metadata.ts) {
parsed = {
...parsed,
fragment: parsed.fragment && remove_typescript_nodes(parsed.fragment),
instance: parsed.instance && remove_typescript_nodes(parsed.instance),
module: parsed.module && remove_typescript_nodes(parsed.module)
};
}
const analysis = analyze_component(parsed, source, combined_options);
const result = transform_component(analysis, source, combined_options);
result.ast = to_public_ast(source, parsed, options.modernAst);
return result;
}
/**
* `compileModule` takes your JavaScript source code containing runes, and turns it into a JavaScript module.
*
* @param {string} source The component source code
* @param {ModuleCompileOptions} options
* @returns {CompileResult}
*/
export function compileModule(source, options) {
source = remove_bom(source);
state.reset_warning_filter(options.warningFilter);
const validated = validate_module_options(options, '');
state.reset(source, validated);
const analysis = analyze_module(parse_acorn(source, false), validated);
return transform_module(analysis, source, validated);
}
/**
* The parse function parses a component, returning only its abstract syntax tree.
*
* The `modern` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
* `modern` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
*
* @overload
* @param {string} source
* @param {{ filename?: string; modern: true }} options
* @returns {AST.Root}
*/
/**
* The parse function parses a component, returning only its abstract syntax tree.
*
* The `modern` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
* `modern` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
*
* @overload
* @param {string} source
* @param {{ filename?: string; modern?: false }} [options]
* @returns {Record<string, any>}
*/
/**
* The parse function parses a component, returning only its abstract syntax tree.
*
* The `modern` option (`false` by default in Svelte 5) makes the parser return a modern AST instead of the legacy AST.
* `modern` will become `true` by default in Svelte 6, and the option will be removed in Svelte 7.
*
* @param {string} source
* @param {{ filename?: string; rootDir?: string; modern?: boolean }} [options]
* @returns {AST.Root | LegacyRoot}
*/
export function parse(source, { filename, rootDir, modern } = {}) {
source = remove_bom(source);
state.reset_warning_filter(() => false);
state.reset(source, { filename: filename ?? '(unknown)', rootDir });
const ast = _parse(source);
return to_public_ast(source, ast, modern);
}
/**
* @param {string} source
* @param {AST.Root} ast
* @param {boolean | undefined} modern
*/
function to_public_ast(source, ast, modern) {
if (modern) {
const clean = (/** @type {any} */ node) => {
delete node.metadata;
delete node.parent;
};
ast.options?.attributes.forEach((attribute) => {
clean(attribute);
clean(attribute.value);
if (Array.isArray(attribute.value)) {
attribute.value.forEach(clean);
}
});
// remove things that we don't want to treat as public API
return zimmerframe_walk(ast, null, {
_(node, { next }) {
clean(node);
next();
}
});
}
return convert(source, ast);
}
/**
* Remove the byte order mark from a string if it's present since it would mess with our template generation logic
* @param {string} source
*/
function remove_bom(source) {
if (source.charCodeAt(0) === 0xfeff) {
return source.slice(1);
}
return source;
}
/**
* @deprecated Replace this with `import { walk } from 'estree-walker'`
* @returns {never}
*/
export function walk() {
throw new Error(
`'svelte/compiler' no longer exports a \`walk\` utility — please import it directly from 'estree-walker' instead`
);
}
export { VERSION } from '../version.js';
export { migrate } from './migrate/index.js';
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