您还可以使用`allowClose`选项来防止用户退出导览。当您希望强制用户在退出之前完成导览时，这个选项非常有用。
在下面的示例中，直到您到达最后一步，您将无法退出导览。
driver.js
driver.js
import { driver } from "driver.js";
import "driver.js/dist/driver.css";
const driverObj = driver({
showProgress: true,
allowClose: false,
steps: [
{ element: '#prevent-exit', popover: { title: 'Animated Tour Example', description: 'Here is the code example showing animated tour. Let\'s walk you through it.', side: "left", align: 'start' }},
{ element: 'code .line:nth-child(1)', popover: { title: 'Import the Library', description: 'It works the same in vanilla JavaScript as well as frameworks.', side: "bottom", align: 'start' }},
{ element: 'code .line:nth-child(2)', popover: { title: 'Importing CSS', description: 'Import the CSS which gives you the default styling for popover and overlay.', side: "bottom", align: 'start' }},
{ popover: { title: 'Happy Coding', description: 'And that is all, go ahead and start adding tours to your applications.' } }
],
});
driverObj.drive();