init commit

1 files changed, 45 insertions, 0 deletions

diff --git a/node_modules/svelte/src/runtime/internal/loop.js b/node_modules/svelte/src/runtime/internal/loop.js
new file mode 100644
index 0000000..5a14565
--- /dev/null
+++ b/node_modules/svelte/src/runtime/internal/loop.js
@@ -0,0 +1,45 @@
+import { raf } from './environment.js';
+
+const tasks = new Set();
+
+/**
+ * @param {number} now
+ * @returns {void}
+ */
+function run_tasks(now) {
+	tasks.forEach((task) => {
+		if (!task.c(now)) {
+			tasks.delete(task);
+			task.f();
+		}
+	});
+	if (tasks.size !== 0) raf(run_tasks);
+}
+
+/**
+ * For testing purposes only!
+ * @returns {void}
+ */
+export function clear_loops() {
+	tasks.clear();
+}
+
+/**
+ * Creates a new task that runs on each raf frame
+ * until it returns a falsy value or is aborted
+ * @param {import('./private.js').TaskCallback} callback
+ * @returns {import('./private.js').Task}
+ */
+export function loop(callback) {
+	/** @type {import('./private.js').TaskEntry} */
+	let task;
+	if (tasks.size === 0) raf(run_tasks);
+	return {
+		promise: new Promise((fulfill) => {
+			tasks.add((task = { c: callback, f: fulfill }));
+		}),
+		abort() {
+			tasks.delete(task);
+		}
+	};
+}