All files / src/compiler/phases/3-transform/client/visitors TransitionDirective.js

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/** @import { Expression } from 'estree' */
/** @import { TransitionDirective } from '#compiler' */
/** @import { ComponentContext } from '../types' */
import { TRANSITION_GLOBAL, TRANSITION_IN, TRANSITION_OUT } from '../../../../../constants.js';
import * as b from '../../../../utils/builders.js';
import { parse_directive_name } from './shared/utils.js';
 
/**
 * @param {TransitionDirective} node
 * @param {ComponentContext} context
 */
export function TransitionDirective(node, context) {
	let flags = node.modifiers.includes('global') ? TRANSITION_GLOBAL : 0;
	if (node.intro) flags |= TRANSITION_IN;
	if (node.outro) flags |= TRANSITION_OUT;
 
	const args = [
		b.literal(flags),
		context.state.node,
		b.thunk(/** @type {Expression} */ (context.visit(parse_directive_name(node.name))))
	];
 
	if (node.expression) {
		args.push(b.thunk(/** @type {Expression} */ (context.visit(node.expression))));
	}
 
	// in after_update to ensure it always happens after bind:this
	context.state.after_update.push(b.stmt(b.call('$.transition', ...args)));
}