diff --git a/dist/timespan.d.ts b/dist/timespan.d.ts
new file mode 100644
index 0000000..a81c3aa
--- /dev/null
+++ b/dist/timespan.d.ts
@@ -0,0 +1,8 @@
+export declare class TimeSpan {
+    private start;
+    private end;
+    constructor(timeSpanStr: string);
+    private parseTime;
+    contains(timestamp?: number): boolean;
+}
+//# sourceMappingURL=timespan.d.ts.map
\ No newline at end of file
diff --git a/dist/timespan.d.ts.map b/dist/timespan.d.ts.map
new file mode 100644
index 0000000..a1085f5
--- /dev/null
+++ b/dist/timespan.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"timespan.d.ts","sourceRoot":"","sources":["../src/timespan.ts"],"names":[],"mappings":"AAAA,qBAAa,QAAQ;IACnB,OAAO,CAAC,KAAK,CAAqC;IAClD,OAAO,CAAC,GAAG,CAAqC;gBAEpC,WAAW,EAAE,MAAM;IAM/B,OAAO,CAAC,SAAS;IAKjB,QAAQ,CAAC,SAAS,GAAE,MAAmB,GAAG,OAAO;CAgBlD"}
\ No newline at end of file
diff --git a/dist/timespan.js b/dist/timespan.js
new file mode 100644
index 0000000..f8f1e98
--- /dev/null
+++ b/dist/timespan.js
@@ -0,0 +1,29 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.TimeSpan = void 0;
+class TimeSpan {
+    constructor(timeSpanStr) {
+        const [startStr, endStr] = timeSpanStr.split("-");
+        this.start = this.parseTime(startStr);
+        this.end = this.parseTime(endStr);
+    }
+    parseTime(timeStr) {
+        const [hours, minutes] = timeStr.split(":").map(Number);
+        return { hours, minutes };
+    }
+    contains(timestamp = Date.now()) {
+        const date = new Date(timestamp);
+        const hours = date.getHours();
+        const minutes = date.getMinutes();
+        const currentMinutes = hours * 60 + minutes;
+        const startMinutes = this.start.hours * 60 + this.start.minutes;
+        const endMinutes = this.end.hours * 60 + this.end.minutes;
+        if (startMinutes > endMinutes) {
+            return currentMinutes >= startMinutes || currentMinutes < endMinutes;
+        }
+        else {
+            return currentMinutes >= startMinutes && currentMinutes < endMinutes;
+        }
+    }
+}
+exports.TimeSpan = TimeSpan;