HtmlTag.js — svelte Source File

Source Code

/** @import { AST } from '#compiler' */
/** @import { ComponentContext } from '../types' */
import { is_ignored } from '../../../../state.js';
import * as b from '#compiler/builders';
import { build_expression } from './shared/utils.js';

/**
 * @param {AST.HtmlTag} node
 * @param {ComponentContext} context
 */
export function HtmlTag(node, context) {
	context.state.template.push_comment();

	const has_await = node.metadata.expression.has_await;
	const has_blockers = node.metadata.expression.has_blockers();

	const expression = build_expression(context, node.expression, node.metadata.expression);
	const html = has_await ? b.call('$.get', b.id('$$html')) : expression;

	const is_svg = context.state.metadata.namespace === 'svg';
	const is_mathml = context.state.metadata.namespace === 'mathml';

	const statement = b.stmt(
		b.call(
			'$.html',
			context.state.node,
			b.thunk(html),
			is_svg && b.true,
			is_mathml && b.true,
			is_ignored(node, 'hydration_html_changed') && b.true
		)
	);

	// push into init, so that bindings run afterwards, which might trigger another run and override hydration
	if (has_await || has_blockers) {
		context.state.init.push(
			b.stmt(
				b.call(
					'$.async',
					context.state.node,
					node.metadata.expression.blockers(),
					has_await ? b.array([b.thunk(expression, true)]) : b.void0,
					b.arrow(
						has_await ? [context.state.node, b.id('$$html')] : [context.state.node],
						b.block([statement])
					)
				)
			)
		);
	} else {
		context.state.init.push(statement);
	}
}