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What is aria-label and how should I use it?
...
It's an attribute designed to help assistive technology (e.g. screen readers) attach a label to an otherwise anonymous HTML element.
So there's the <label> element:
<label for="fmUserName">Your name</label>
<input id="fmUserName">
The <label> explicitl...
When to use IMG vs. CSS background-image?
...the meaning of the image can be communicated in all user-agents, including screen readers.
Pragmatic uses of IMG
Use IMG plus alt attribute if the image
is part of the content such as a logo or diagram or person (real person, not stock photo people).
—sanchothefat
Use IMG if you rely on bro...
iPhone 5 CSS media query
The iPhone 5 has a longer screen and it's not catching my website's mobile view. What are the new responsive design queries for the iPhone 5 and can I combine with existing iPhone queries?
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Circular gradient in android
I'm trying to make a gradient that emits from the middle of the screen in white, and turns to black as it moves toward the edges of the screen.
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@Media min-width & max-width
...for a 600px - 960px width max but using percentages
*/
@media only screen and (min-width: 960px) {
/* styles for browsers larger than 960px; */
}
@media only screen and (min-width: 1440px) {
/* styles for browsers larger than 1440px; */
}
@media only screen an...
How do I increase the scrollback buffer in a running screen session?
Lets say I have a currently running screen session I am interacting with through putty. I've realized that the scrollback buffer is too small and would like to increase it without starting a new screen session.
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Detect when browser receives file download
...ts click with defined download class it lets to show custom message on the screen. I've used focus trigger to hide the message.
JavaScript
$(function(){$('.download').click(function() { ShowDownloadMessage(); }); })
function ShowDownloadMessage()
{
$('#message-text').text('your report is cre...
How to change the font on the TextView?
...eployment of these tools is essential to help users
quickly understand a screen of information. To support such use of
typography, Ice Cream Sandwich introduced a new type family named
Roboto, created specifically for the requirements of UI and
high-resolution screens.
The current TextV...
Detect 7 inch and 10 inch tablet programmatically
...u can use the DisplayMetrics to get a whole bunch of information about the screen that your app is running on.
First, we create a DisplayMetrics metrics object:
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
From this, we can get the in...
垂直布局，高度无法充满怎么解决 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
C:\Users\Lenovo\Desktop\wechat_2025-04-06_205731_542.png你好，请把 Screen1 下面的组件树展开看看。
目测是因为这个 垂直布局 的父组件，高度没有充满整个屏幕，所以它只能充满它的父组件的高度。没有设置的选项App Inventor 2 发表...