Sorry, 你不能在Guttenberg区块外使用它

but you can get same result every where in wp-admin by using the following solution,

有关详细信息，请访问WP Official Documentation

this.posts = {};
this.posts = new wp.api.models.Post();
this.posts.fetch().then( response => {
   console.log(response);
});

  import {render,Component} from "@wordpress/element";

    class TestingPage extends Component {
            constructor() {
                super( ...arguments );

                // Solution - Start 
                this.posts = {};
                this.posts = new wp.api.models.Post();
                this.posts.fetch().then( response => {
                   console.log(response);
                });
                // Solution - End

        }

        render(
            <TestingPage/>,
            document.getElementById( \'testing-page\' )
        );