How to solve the error when previewing demo on github

Github is a very popular open source code hosting platform. It provides many convenient functions, such as version management, collaborative development, etc. At the same time, Github also supports online preview of the demo page included in the code file. However, sometimes when we preview the demo on Github, errors appear, which makes many people very confused. So, why does the Github preview demo go wrong? How can we solve this problem?

1. Reasons why Github preview demo goes wrong

First of all, let us understand why Github preview demo goes wrong. In fact, Github has a special URL for displaying pages. The format of this URL is:

https://username.github.io/repositoryname/filename

where username is yourself Github username, repositoryname is the name of your warehouse, and filename is the name of the page you want to display. Usually, we can find a file called index.html in the Github repository. This file is the page we want to display.

So, when we visit the above URL, if a "404 Not Found" error occurs, it means that Github did not find the page you want to display. This usually has the following reasons:

1. Not submitting the latest code

Many people forget to submit to Github after updating the code. When accessing the preview link, a "404 Not Found" error will appear.

2. No home page set

If your Github repository does not have a home page set, a "404 Not Found" error will also appear when accessing the preview link. In order to avoid this situation, we should set up a homepage and point the page link to the homepage for normal access.

3. Link address error

Sometimes, the link address does not have a spelling error, but is missing some necessary content, causing the page to fail to display properly.

2. How to solve the problem of Github preview demo

1. Confirm whether all the codes are submitted to Github

If you just updated the code, but found that the preview If there is a problem with the page, then it is very likely that you did not submit the code to Github. At this time, we can submit the code through the Git command line or Github Desktop to ensure that all code is submitted and no errors occur.

2. Set Github warehouse homepage

In your Github warehouse, you can choose a static page as the warehouse homepage. At this time, your page link will point to this home page, not the warehouse link.

To set the warehouse homepage, you first need to create an index.html file in the warehouse as the homepage. Then, find the "Github Pages" option in the Settings page of the warehouse, select "master branch" as the source, and click Save to save.

After waiting for a while, your Github repository will have a static homepage, which you can find under the Github Pages option. You can access your website through this static link, so there will be no errors when previewing the demo.

3. Check whether the link address is correct

When previewing the demo, if there is an error in the link address, the page may not be displayed properly. We can check whether the link address is correct. The link should contain your Github username, warehouse name and the name of the page to be displayed.

If there is no error in the link address, you can also find the Github Pages option in the Settings page of the warehouse to check whether the website settings contain the correct link address.

In short, when we preview the demo on Github, errors may occur because we have not submitted the latest code, have not set a homepage, or have an error in the link address. Dealing with these problems requires us to carefully check to ensure that all codes and link addresses are correct so that our demo page can be previewed and displayed normally.

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