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One of the most confusing aspects of CSS styling is the Font-size property of the text extension in your application. In CSS, you can display the size of text in a Web browser in four different units of measure.Which of the four units is best for the Web? The problem aroused a wide controversy. It is difficult to find a definite answer, because it is so difficult to answer on its own.Contact these units1. "Ems" (EM): "em" is a scalable unit for Web document Media presentation. An em equals the c

1.pxThis is not much of an explanation, it is a physical pixel point on the screen. Eyes good small partner carefully look at the screen should be able to see the small lattice, not a drop of water to see.It is not recommended to use PX, the same picture may be different on different phone sizes. High resolution display of the small, low resolution of the large display.2.dpThis unit should be carefully understood, and it is related to pixel density. F

Mobile-H5 responsive Solutions The most used in recent years is the REM solution. This requires that the font-size of the root element be computed to implement the response.But this scheme also has a disadvantage, that is, font-size is not an integer when some fonts use REM units will cause the font display size problems, for the visual restore requirements of high-quality projects this is still a headache for the front-end development.The solution to the front-end response is nothing more than

px Pixels (Pixel). Relative length units. Pixel px is relative to the display screen resolutionEM is the relative length unit. The font size relative to the text within the current object. If the font size of the current inline text is not artificially set, the default font size is relative to the browser.Em relative to the parent element!The default font height for any browser is 16px. All non-adjustable b

PxThat is, the pixel, 1px represents a physical pixel on the screen;PX units are not recommended, as the same 100px picture, the actual size displayed on different phones may be different as shown (images from Android Developer Guide, same as below). The occasional use of PX is when you need to draw a 1-pixel table line or a hatched line, with other units such as DP will appear blurred. Dp

In the XML layout file, we can either set the PX or set the DP (or DIP). In general, we will choose to use DP, which will ensure that the layout of different screen resolutions on the machine is consistent. But in the code, how to deal with it? Many of the methods in the control provide only a method for setting PX, such as setpadding, and do not provide a way to set the DP. At this point, if you need to se

node HTML {font-size:62.5%} so 1rem is equal to 10px, etc...To declare: REM is the CSS3 attribute, yes! This means that Dick Silk ie678 does not support REM properties, only Chrome, Firefox and other high-fidelity support! Then we will use PX in the ie678 to do compatible processing, for example:. box {font-size:14px;/* for compatibility with ie678 */font-size:0.875em;}PX Featurespx Pixels (Pixel). Relativ

1. dip: Device Independent pixels (device independent pixel ). different devices have different display effects. This is related to the hardware of the device. We recommend that you use this function to support WVGA, hvga, and qvga without pixels. Note that the dip is related to the screen density, and the screen density is related to the specific hardware. Incorrect hardware settings may cause the dip to fail to be properly displayed. On a display with a screen density of 160, 1dip = 1px, somet

Concept:DPI (dots per inch): points per inch, initially used to measure the density of dots per inch on the print, and how many points the printer plays in an inch. The smaller the DPI value, the less fine.PPI (Pixels per inch): The number of pixels per inch, when the concept of DPI is used on an electronic screen, it should be called the PPI.For developers, DPI is Ppi,ppi dpi, which is collectively referred to as screen density.PX (Pixel): units of pixels, can be understood as the actual length

px is absolute unit, does not support the zoom of IE, EM is relative unit. EM refers to the high font, any browser default font height is 16px. So the unmodified browser is compliant with: 1EM=16PX. So 12px=0.75em, 10px=0.625em. To simplify the conversion of font-size, you need to declare font-size=62.5% in the body selector in the CSS, which makes the EM value 16px*62.5%=10px, so 12px=1.2em, 10px=1em, That means you just have to divide your original

=62.5% in the body selector;2. Divide your original PX value by 10 and then replace it with EM as the unit;3. Recalculate the EM values of the enlarged fonts. Avoid duplicate declarations of font size.We know that the default font height for any browser is 16px. All non-adjustable browsers are compliant with: 1EM=16PX. So 12px=0.75em,10px=0.625em. To simplify the conversion of font-size, you need to declare font-size=62.5% in the body selector in the

The screen has a fixed physical long width attribute and resolutionLike a computer, like a phone screen.For example, the phone screen size is 1.5 inches x2 inches, the screen resolution is 240x320,Then you can calculate the number of pixels per inch (dpi) in the horizontal direction: 240/1.5=160, can also calculate the vertical direction per inch1PX refers to a pixel on the screen, the principle of screen imaging is through the screen dense pixel point imaging;Therefore, when the DPI of our scre

If we need to set the unit of text to EM. What should we do?PX is a pixel, is the unit relative to the screen resolution, EM is relative to the browser default font size units, such as in the browser, the default text size is 16px, then the default 1em=16px. If we need to set the size of the text to EM, Then we need to calculate the size of the text we need to set relative to the default font size in multiples. For example, we want to set the font to

Dip, DP, PX, SP, and screen density in AndroidTransferred from: http://www.cnblogs.com/fbsk/archive/2011/10/17/2215539.html1. Dip:device independent pixels (device independent pixels). Different devices have different display effects, this is related to the device hardware, generally we support WVGA, HVGA and QVGA recommended use this, do not rely on pixels.It is important to note that dip is related to screen density and that the screen density is re

document sizes are divided into two categories: relative length units and absolute length units. However, relative length units according to different reference elements, but also can be divided into font relative units and Windows relative units. The relative units of the font are: Em, ex, CH, rem; the window relative units contain: VW, VH, Vmin, Vmax several. Absolute positioning is fixed dimensions, which are in physical units of measure: cm, MM, in, PX