display: none和visibility: hidden的主要區(qū)別在于布局影響和可訪問性。1. display: none完全從頁面移除元素，不占空間，屏幕閱讀器通常忽略它；2. visibility: hidden隱藏元素但保留其空間，某些情況下仍可能被屏幕閱讀器讀取。選擇時需考慮是否需要保留布局結(jié)構(gòu)或是否允許訪問內(nèi)容：前者適用于徹底隱藏并排除交互的場景，如非活動標(biāo)簽頁；后者適用于保持布局穩(wěn)定且可能快速重新顯示的情況，例如動畫過渡。此外，visibility: hidden可通過opacity實現(xiàn)動畫效果，而display無法過渡。兩者均不影響JavaScript操作，但visibility: hidden的子元素也會被強制隱藏。

When you're hiding elements on a webpage, two common CSS properties come into play: display: none and visibility: hidden. While they may seem similar at first glance, they actually behave quite differently in how they affect layout and accessibility.

How display: none Works

Using display: none completely removes an element from the page. It won't take up any space, and the browser acts as if it's not there at all.

• Layout impact: The element doesn’t occupy any space.
• Accessibility: Screen readers usually ignore elements with display: none.
• Use cases: Great for conditionally removing elements entirely, like hiding tabs that aren't active.

This method is often used when you don’t want an element to be part of the layout or interacted with at all.

What Happens with visibility: hidden

On the other hand, visibility: hidden makes an element invisible but keeps its space in the layout.

• Layout impact: The element still takes up space.
• Accessibility: Some screen readers might still read the content depending on context.
• Use cases: Useful when you want to hide something visually but keep its position intact, such as preloading UI states.

For example, this can be handy for animations where an element will appear later without shifting surrounding content.

When to Choose One Over the Other

Your choice depends on what you need the hidden element to do:

• Use display: none if:

  • You want the element completely out of sight and layout.
  • You don’t want it to be accessible via screen readers.
  • You're toggling content that shouldn't affect surrounding elements.

• Use visibility: hidden if:

  • You want to maintain layout structure.
  • You plan to show the element again soon.
  • You want the element to remain accessible in some contexts.

Also consider transitions — visibility can be animated with opacity, while display cannot.

A Few Subtle Gotchas

One thing people often miss is how these properties interact with JavaScript:

• Elements with display: none can still be targeted and manipulated via JS.
• Setting visibility: hidden doesn't prevent click events if the element still exists in the DOM and has handlers attached.

Also, visibility: hidden affects child elements too — they become hidden even if their own visibility is set to visible.

So depending on your use case, either approach could be better. Just remember that display: none fully removes the element from rendering, while visibility: hidden hides it but keeps its place.

基本上就這些。

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