cocos-engine/editor/assets/default_file_content/js

import { _decorator, Component, Node } from 'cc';
const { ccclass, property } = _decorator;

@ccclass('<%UnderscoreCaseClassName%>')
export class <%UnderscoreCaseClassName%> extends Component {
    
    // class member could be defined like this.
    dummy = '';

    // Use 'property' decorator if your want the member to be serializable.
    @property
    serializableDummy = 0;

    start() {
        // Your initialization goes here.
    }

    update(deltaTime) {
        // Your update function goes here.
    }

}