[backend] fix: 修复异常处理和类型转换问题

frontend/node_modules/rc-util/es/raf.js

@@ -0,0 +1,54 @@
+var raf = function raf(callback) {
+  return +setTimeout(callback, 16);
+};
+var caf = function caf(num) {
+  return clearTimeout(num);
+};
+if (typeof window !== 'undefined' && 'requestAnimationFrame' in window) {
+  raf = function raf(callback) {
+    return window.requestAnimationFrame(callback);
+  };
+  caf = function caf(handle) {
+    return window.cancelAnimationFrame(handle);
+  };
+}
+var rafUUID = 0;
+var rafIds = new Map();
+function cleanup(id) {
+  rafIds.delete(id);
+}
+var wrapperRaf = function wrapperRaf(callback) {
+  var times = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 1;
+  rafUUID += 1;
+  var id = rafUUID;
+  function callRef(leftTimes) {
+    if (leftTimes === 0) {
+      // Clean up
+      cleanup(id);
+
+      // Trigger
+      callback();
+    } else {
+      // Next raf
+      var realId = raf(function () {
+        callRef(leftTimes - 1);
+      });
+
+      // Bind real raf id
+      rafIds.set(id, realId);
+    }
+  }
+  callRef(times);
+  return id;
+};
+wrapperRaf.cancel = function (id) {
+  var realId = rafIds.get(id);
+  cleanup(id);
+  return caf(realId);
+};
+if (process.env.NODE_ENV !== 'production') {
+  wrapperRaf.ids = function () {
+    return rafIds;
+  };
+}
+export default wrapperRaf;