update：雪案例代码的修改

src/examples/weather/snow/snow-function.js

-export function addSnow() {
-    const script = document.createElement('script');
-    script.src = 'https://cesium.com/downloads/cesiumjs/releases/1.99/Build/Cesium/Cesium.js';
-    script.onload = () => {
-        window.Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI3Njg4ZWU5Yi1iZDhiLTRhYmUtOTRiYS04YjM5NmUwNjVmMDMiLCJpZCI6MjI3MzQ3LCJpYXQiOjE3MjA1MjA4Mjh9.E5XW4LnwgfVAaBC-znaYr61m4yK0-j2qEQhi9qwFFPE'
-
-        const viewer = new window.Cesium.Viewer('cesiumContainer', {
-            infoBox: false,
-        });
-
-        viewer.scene.postProcessStages.add(new Cesium.PostProcessStage({
-            fragmentShader: `
-                    uniform sampler2D colorTexture; 
-                    varying vec2 v_textureCoordinates;
-                    uniform float snowSpeed;
-                    uniform float snowSize;
-                    float snow(vec2 uv,float scale)
-                    {
-                        float time=czm_frameNumber*snowSpeed;
-                        float w=smoothstep(1.,0.,-uv.y*(scale/10.));if(w<.1)return 0.;
-                        uv+=time/scale;uv.y+=time*2./scale;uv.x+=sin(uv.y+time*.5)/scale;
-                        uv*=scale;vec2 s=floor(uv),f=fract(uv),p;float k=3.,d;
-                        p=.5+.35*sin(11.*fract(sin((s+p+scale)*mat2(7,3,6,5))*5.))-f;d=length(p);k=min(d,k);
-                        k=smoothstep(0.,k,sin(f.x+f.y)*snowSize);
-                        return k*w;
-                    }
-                    varying vec4 fragColor;
-                    void main(void){
-                        vec2 resolution=czm_viewport.zw;
-                        vec2 uv=(gl_FragCoord.xy*2.-resolution.xy)/min(resolution.x,resolution.y);
-                        vec3 finalColor=vec3(0);
-                        float c=0.;
-                        c+=snow(uv,30.)*.0;
-                        c+=snow(uv,20.)*.0;
-                        c+=snow(uv,15.)*.0;
-                        c+=snow(uv,10.);
-                        c+=snow(uv,8.);
-                        c+=snow(uv,6.);
-                        c+=snow(uv,5.);
-                        finalColor=(vec3(c));
-                        gl_FragColor = mix(texture2D(colorTexture, v_textureCoordinates), vec4(finalColor, 1.0), 0.5);
-                    }
-                `,
-            uniforms: {
-                snowSize: 0.02,
-                snowSpeed: 0.005
-            },
-        }));
-    };
-    document.head.appendChild(script);
-
-    const link = document.createElement('link');
-    link.rel = 'stylesheet';
-    link.href = 'https://cesium.com/downloads/cesiumjs/releases/1.119/Build/Cesium/Widgets/widgets.css';
-    document.head.appendChild(link);
+export function addSnow(viewer) {
+    viewer.scene.postProcessStages.add(new Cesium.PostProcessStage({
+        fragmentShader: `
+                uniform sampler2D colorTexture; 
+                varying vec2 v_textureCoordinates;
+                uniform float snowSpeed;
+                uniform float snowSize;
+                float snow(vec2 uv,float scale)
+                {
+                    float time=czm_frameNumber*snowSpeed;
+                    float w=smoothstep(1.,0.,-uv.y*(scale/10.));if(w<.1)return 0.;
+                    uv+=time/scale;uv.y+=time*2./scale;uv.x+=sin(uv.y+time*.5)/scale;
+                    uv*=scale;vec2 s=floor(uv),f=fract(uv),p;float k=3.,d;
+                    p=.5+.35*sin(11.*fract(sin((s+p+scale)*mat2(7,3,6,5))*5.))-f;d=length(p);k=min(d,k);
+                    k=smoothstep(0.,k,sin(f.x+f.y)*snowSize);
+                    return k*w;
+                }
+                varying vec4 fragColor;
+                void main(void){
+                    vec2 resolution=czm_viewport.zw;
+                    vec2 uv=(gl_FragCoord.xy*2.-resolution.xy)/min(resolution.x,resolution.y);
+                    vec3 finalColor=vec3(0);
+                    float c=0.;
+                    c+=snow(uv,30.)*.0;
+                    c+=snow(uv,20.)*.0;
+                    c+=snow(uv,15.)*.0;
+                    c+=snow(uv,10.);
+                    c+=snow(uv,8.);
+                    c+=snow(uv,6.);
+                    c+=snow(uv,5.);
+                    finalColor=(vec3(c));
+                    gl_FragColor = mix(texture2D(colorTexture, v_textureCoordinates), vec4(finalColor, 1.0), 0.5);
+                }
+            `,
+        uniforms: {
+            snowSize: 0.02,
+            snowSpeed: 0.005
+        },
+    }));
 }

src/examples/weather/snow/snow.vue

 <template>
     <div id="cesiumContainer" class="cesium-container"></div>
 </template>
+
 <script setup>
 import { onMounted } from 'vue';
 import { addSnow } from './function';
+
+let viewer;
+
 onMounted(() => {
-    addSnow()
+    const script = document.createElement('script');
+    script.src = 'https://cesium.com/downloads/cesiumjs/releases/1.99/Build/Cesium/Cesium.js';
+    script.onload = () => {
+        window.Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI3Njg4ZWU5Yi1iZDhiLTRhYmUtOTRiYS04YjM5NmUwNjVmMDMiLCJpZCI6MjI3MzQ3LCJpYXQiOjE3MjA1MjA4Mjh9.E5XW4LnwgfVAaBC-znaYr61m4yK0-j2qEQhi9qwFFPE'
+
+        viewer = new window.Cesium.Viewer('cesiumContainer', {
+            infoBox: false,
+        });
+
+        addSnow(viewer)
+
+    };
+    document.head.appendChild(script);
+    const link = document.createElement('link');
+    link.rel = 'stylesheet';
+    link.href = 'https://cesium.com/downloads/cesiumjs/releases/1.119/Build/Cesium/Widgets/widgets.css';
+    document.head.appendChild(link);
 });
 </script>
 
 <style>
 .cesium-container {
-width: 100%;
-height: 100vh;
+    width: 100%;
+    height: 100vh;
 }
 </style>
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