Revert "chore: remove ssr check in integrations"

This reverts commit ba27eaa.

packages/integrations/preact/client.js

@@ -2,6 +2,7 @@ import { h, render } from 'preact';
 import StaticHtml from './static-html.js';
 
 export default (element) => (Component, props, children) => {
+	if (!element.hasAttribute('ssr')) return;
 	render(
 		h(Component, props, children != null ? h(StaticHtml, { value: children }) : children),
 		element

packages/integrations/react/client.js

@@ -12,6 +12,7 @@ function isAlreadyHydrated(element) {
 
 export default (element) =>
 	(Component, props, children, { client }) => {
+		if (!element.hasAttribute('ssr')) return;
 		const componentEl = createElement(
 			Component,
 			props,

packages/integrations/solid/client.js

@@ -6,6 +6,7 @@ export default (element) => (Component, props, childHTML, { client }) => {
 	if (!window._$HY) {
 		window._$HY = { events: [], completed: new WeakSet(), r: {} };
 	}
+	if (!element.hasAttribute('ssr')) return;
 
 	const fn = client === 'only' ? render : hydrate;
 

packages/integrations/svelte/client.js

@@ -2,6 +2,7 @@ import SvelteWrapper from './Wrapper.svelte';
 
 export default (target) => {
 	return (component, props, children, { client }) => {
+		if (!target.hasAttribute('ssr')) return;
 		delete props['class'];
 		try {
 			new SvelteWrapper({

packages/integrations/vue/client.js

@@ -3,6 +3,7 @@ import StaticHtml from './static-html.js';
 
 export default (element) => (Component, props, children, { client }) => {
 	delete props['class'];
+	if (!element.hasAttribute('ssr')) return;
 
 	// Expose name on host component for Vue devtools
 	const name = Component.name ? `${Component.name} Host` : undefined;