fix: rendering cover width bug

[HerbertHe]

Summary

fix cover rendering bug, the width of cover has not filled the whole page

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Docs
• Build-related changes
• Other, please describe:

If changing the UI of default theme, please provide the before/after screenshot:

before

sometimes display not well but not always

after

Does this PR introduce a breaking change? (check one)

• Yes
• No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)

You have tested in the following browsers: (Providing a detailed version will be better.)

• Chrome
• Firefox
• Safari
• Edge
• IE

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature
• Related documents have been updated
• Related tests have been updated

To avoid wasting your time, it's best to open a feature request issue first and wait for approval before working on it.

Other information:

---

• DO NOT include files inside lib directory.

[anikethsaha]

can you share the before screen shot ?

[HerbertHe]

sorry, it happens sometimes but not always. when I refreshed, it would be normal

[Koooooo-7]

I prefer to don't change things when it isn't reproducible stably.

[anikethsaha]

I prefer to don't change things when it isn't reproducible stably.

agreed 💯

this might be a safe change. but still, @HerbertHe can you at least describe what you did to produce this

[HerbertHe]

I prefer to don't change things when it isn't reproducible stably.

agreed 💯

this might be a safe change. but still, @HerbertHe can you at least describe what you did to produce this

Once, when I refresh the page but the cover page leaved behind a space area, so I check the style of the DOM node. I found that the class section.cover didn't include the style to control the width, and I added width: 100vw; to the class and then it displayed well. At most time, the content would fill all of the width, but I think that limiting the style seems better.

And I only add the width: 100vw; to limit the style of the cover width.