New Huajishe Check ChaoXing

HuajisheCheckChaoXing/miniprogram_npm/tdesign-miniprogram/common/bus.js

@@ -0,0 +1,22 @@
+export default class Bus {
+    constructor() {
+        this.listeners = new Map();
+        this.emitted = new Set();
+    }
+    on(evtName, listener) {
+        if (this.emitted.has(evtName)) {
+            listener();
+            return;
+        }
+        const target = this.listeners.get(evtName) || [];
+        target.push(listener);
+        this.listeners.set(evtName, target);
+    }
+    emit(evtName) {
+        const listeners = this.listeners.get(evtName);
+        if (listeners) {
+            listeners.forEach((func) => func());
+        }
+        this.emitted.add(evtName);
+    }
+}