[backend] fix: 修复异常处理和类型转换问题

frontend/node_modules/cssstyle/lib/properties/right.js

@@ -0,0 +1,30 @@
+"use strict";
+
+const parsers = require("../parsers");
+
+module.exports.parse = function parse(v) {
+  const dim = parsers.parseMeasurement(v);
+  if (dim) {
+    return dim;
+  }
+  return parsers.parseKeyword(v, ["auto"]);
+};
+
+module.exports.isValid = function isValid(v) {
+  if (v === "") {
+    return true;
+  }
+  return typeof module.exports.parse(v) === "string";
+};
+
+module.exports.definition = {
+  set(v) {
+    v = parsers.prepareValue(v, this._global);
+    this._setProperty("right", module.exports.parse(v));
+  },
+  get() {
+    return this.getPropertyValue("right");
+  },
+  enumerable: true,
+  configurable: true
+};