CSS屬性選擇器中，^=、$=和\*=的區(qū)別在于匹配屬性值的位置不同。^[attr^="value"]匹配以指定值開頭的屬性，如a[href^="https"]選中所有以"https"開頭的鏈接；^[attr$="value"]匹配以指定值結(jié)尾的屬性，如a[href$=".pdf"]選中所有以".pdf"結(jié)尾的鏈接；^[attr="value"]匹配屬性值中包含指定子串的元素，如img[src="cat"]選中src含"cat"的圖片，無論位置如何。三者分別用于精準(zhǔn)定位屬性值的開始、結(jié)束或任意位置。

If you've ever looked at CSS attribute selectors and wondered what the difference is between ^=, $=, and *=, you're not alone. These symbols might look similar at first glance, but they actually do very different things when matching elements based on attribute values.

[attr^="value"] – Starts With

This selector matches elements where the specified attribute starts with the given value.

For example:

a[href^="https"]

This would target all anchor tags whose href starts with "https", which is handy if you want to style secure links differently — like adding a lock icon or changing the color.

? A common use case:

• Highlight external links
• Target specific file types (e.g., [src^="img/logo"])

Just remember, it's about the beginning of the string — not the whole thing.

[attr$="value"] – Ends With

This one does the opposite of ^= — it matches attributes that end with a certain value.

Example:

a[href$=".pdf"]

This targets any link that ends in .pdf. It’s super useful for applying styles to downloadable files — maybe you want to add a small PDF icon next to those links.

?? One thing to watch out for:

• It must match the exact ending
• So file.pdf?version=1 wouldn’t match [href$=".pdf"]

It’s great for filtering by file extensions or specific endings without needing extra classes.

[attr*="value"] – Contains

This selector is more flexible — it matches elements where the attribute contains the value anywhere within it.

Say you have:

img[src*="cat"]

This would match any image tag where the src includes "cat", like cat.jpg, kitten-cat.png, or even category.jpg.

? But be careful — this can be too broad.

• It matches any occurrence of the substring
• Not just full words or exact patterns

It’s useful when you want to apply styles to a group of related items without having to list them all.

So yeah, the main differences come down to where in the string the match occurs:

• ^= checks the beginning
• $= checks the end
• *= looks anywhere inside

They’re subtle but powerful tools once you know how each behaves.

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