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用隱藏的img，通過src的調(diào)用后臺邏輯有什么好處？

發(fā)現(xiàn)有些web程序中會在頁面中放置一個隱藏的img，然后把它的src設(shè)置為調(diào)用后臺業(yè)務(wù)邏輯的url。這樣做有什么好處？和加載頁面后通過javascript發(fā)起一個ajax請求有什么區(qū)別嗎？

From [HTMLdiscussion group] 2016-11-07 14:06:42 0  2  1148

javascript - Mobile phone number on h5 is not recognized by default

I checked information on the Internet and it said that mobile browsers support mobile phone number recognition...

From [HTMLdiscussion group] 2017-06-24 09:43:23 0  3  1147

What format should be used for the content after <body? Can I put a web link?

What format should be used for the content after <body? Can I put a web link?

From [HTMLdiscussion group] 2022-09-24 19:26:01 0  2  1146

使用代碼注釋，有什么好處么？

From [HTMLdiscussion group] 2016-12-19 10:34:11 0  2  1146

About the video tag problem in html5

In the video tag, what does x-webkit-airplay="allow" mean?

From [HTMLdiscussion group] 2017-05-17 09:57:26 0  2  1146

還是看不懂絕對定位和固定定位，求大神幫忙解釋一下？

From [HTMLdiscussion group] 2016-12-19 17:11:36 0  4  1145

emment syntax

The vsco emment language cannot be used, how to solve it? .. '.. '? .??

From [HTMLdiscussion group] 2020-05-25 13:43:43 0  0  1145

在選擇器中，父子關(guān)系怎么來的？

第一代子元素和父元素，憑什么斷定他們之間的父子關(guān)系

From [HTMLdiscussion group] 2016-12-19 13:15:49 0  2  1144

Transforming and filtering images results in overlay

I found a code that increases the size of the image when you hover it and the hovered image doesn't get croppe...

From [HTMLdiscussion group] 2023-09-15 20:58:43 0  1  1144

頭部的元素

頭部元素容器是什么

From [HTMLdiscussion group] 2017-02-11 17:36:48 0  2  1144

html5 - 字體圖標(biāo)在網(wǎng)頁顯示時會莫名出現(xiàn)一個橫杠，不知為何?

但是網(wǎng)上的實(shí)例就沒有 是不是我的代碼有問題，還是怎么回事？

From [HTMLdiscussion group] 2017-04-17 11:29:03 0  1  1143

Cannot fast forward. . .

Cannot fast forward. . .

From [HTMLdiscussion group] 2017-06-19 17:06:21 0  1  1142

javascript - Questions about timers and preventing continuous clicks

{Code...} As above, I used vsg to randomly generate 30 circles. I hope that when I click on each circle, the c...

From [HTMLdiscussion group] 2017-06-21 10:12:14 0  2  1142

javascript - canvas clearRect failed to clear

As shown in the figure, some Android machines are not compatible. The effect will be that when the number chan...

From [HTMLdiscussion group] 2017-05-31 10:40:24 0  3  1142

Regarding the use of html5

The new features of html5 are very good, but many browsers do not support it well, mainly IE. So is it used mu...

From [HTMLdiscussion group] 2017-06-30 09:57:47 0  1  1141