第一步，引入stats类并new出来

import Stats from 'three/examples/jsm/libs/stats.module.js';

data(){return {stats : new Stats(),}
}

第二步，添加dom

 mounted() {this.init3D();this.animate();window.addEventListener("keydown", this.toggleFullscreen, true);document.body.appendChild(this.stats.dom);//添加domthis.openFullScreen();},

第三步，实时更新

 animate() {if (!this.renderer) {return;}requestAnimationFrame(this.animate);this.controls.update(); // 更新控制器状态TWEEN.update();this.renderer.render(this.scene, this.camera);this.stats.update(); //更新fpx状态if (!this.tagRenderer) {return;}this.tagRenderer.render(this.scene, this.camera);},