Does Cesium is not support KmlDataSource to load KML file in vue framework?

[red0514]

In my case, I followed this demo code that it was success.
But, when I import a KML file from this project of folder which always get an error message.

Here is my code and my kml file.

CesiumViewer.vue

import * as Cesium from "cesium"
import "cesium/Source/Widgets/widgets.css";

const viewer = new Cesium.Viewer('app')
viewer.scene.debugShowFramesPerSecond = true
viewer.dataSources.add(Cesium.KmlDataSource.load('../SampleData/demo.kml',
    {
        camera: viewer.scene.camera,
        canvas: viewer.scene.canvas
    })
);

package.json

{
  "name": "vue-cesium",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build",
    "lint": "vue-cli-service lint"
  },
  "dependencies": {
    "cesium": "^1.100.0",
    "core-js": "^3.8.3",
    "vue": "^3.2.13"
  },
  "devDependencies": {
    "@babel/core": "^7.12.16",
    "@babel/eslint-parser": "^7.12.16",
    "@vue/cli-plugin-babel": "~5.0.0",
    "@vue/cli-plugin-eslint": "~5.0.0",
    "@vue/cli-service": "~5.0.0",
    "copy-webpack-plugin": "^9.1.0",
    "eslint": "^7.32.0",
    "eslint-plugin-vue": "^8.0.3",
    "webpack": "^5.75.0"
  },
  "eslintConfig": {
    "root": true,
    "env": {
      "node": true
    },
    "extends": [
      "plugin:vue/vue3-essential",
      "eslint:recommended"
    ],
    "parserOptions": {
      "parser": "@babel/eslint-parser"
    },
    "rules": {}
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not dead",
    "not ie 11"
  ]
}

Tree Commend

KML File
demo.kml (336.8 KB)

–
Does Cesium is not support KmlDataSource to load KML file in vue framework?
Or here are some mistake of setting in my project?

Thank you for your anwser.