index.js — svelte Source File

Source Code

/** @import { VariableDeclarator, Node, Identifier, AssignmentExpression, LabeledStatement, ExpressionStatement } from 'estree' */
/** @import { Visitors } from 'zimmerframe' */
/** @import { ComponentAnalysis } from '../phases/types.js' */
/** @import { Scope } from '../phases/scope.js' */
/** @import { AST, Binding, ValidatedCompileOptions } from '#compiler' */
import MagicString from 'magic-string';
import { walk } from 'zimmerframe';
import { parse } from '../phases/1-parse/index.js';
import { regex_valid_component_name } from '../phases/1-parse/state/element.js';
import { analyze_component } from '../phases/2-analyze/index.js';
import { get_rune } from '../phases/scope.js';
import { reset, UNKNOWN_FILENAME } from '../state.js';
import {
	extract_identifiers,
	extract_all_identifiers_from_expression,
	is_text_attribute
} from '../utils/ast.js';
import { migrate_svelte_ignore } from '../utils/extract_svelte_ignore.js';
import { validate_component_options } from '../validate-options.js';
import { is_reserved, is_svg, is_void } from '../../utils.js';
import { regex_is_valid_identifier } from '../phases/patterns.js';

const regex_style_tags = /(<style[^>]+>)([\S\s]*?)(<\/style>)/g;
const style_placeholder = '/*$$__STYLE_CONTENT__$$*/';

let has_migration_task = false;

class MigrationError extends Error {
	/**
	 * @param {string} msg
	 */
	constructor(msg) {
		super(msg);
	}
}

/**
 *
 * @param {State} state
 */
function migrate_css(state) {
	if (!state.analysis.css.ast?.start) return;
	const css_contents = state.str
		.snip(state.analysis.css.ast.start, /** @type {number} */ (state.analysis.css.ast?.end))
		.toString();
	let code = css_contents;
	let starting = 0;

	// since we already blank css we can't work directly on `state.str` so we will create a copy that we can update
	const str = new MagicString(code);
	while (code) {
		if (
			code.startsWith(':has') ||
			code.startsWith(':is') ||
			code.startsWith(':where') ||
			code.startsWith(':not')
		) {
			let start = code.indexOf('(') + 1;
			let is_global = false;

// ... (1937 more lines)