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" can be "14px", or "20px", or "24px", in short is an indeterminate value, then solve the problem, either you know the value of its parent element, or you can use "1em" in any child element. Rem REM:W3C Official website description is "font size of the root element", i.e. REM is relative to the root elements. We only need to determine a reference value in the root element and how much font to set in the roo
This article mainly introduces the application of rem layout in react in JavaScript, friends who need it can refer to the previous section to share with you a react project (http://www.jb51.net/article/76085.htm ), this time, we made some improvements to this project, adding the rem layout and iscroll optimization on Android. Project CODE. welcome to fork and star for online preview.
1, px: pixel, accurate display2, EM: Inherit the size of the parent font, equivalent to "times", such as: the browser default font size is 16px=1em, always follow the font size of Div inheritance, entry for mobileEM conversion Tool: http://www.runoob.com/tags/ref-pxtoemconversion.html3. REM: Similar to EM, REM is the attribute of the inherited root node (that is, the 4. VH: 1%=1VH of the current visible hei
PX is the smallest point that your screen device can physically display, which is not a fixed width, and the length and width of points on different devices may vary.Assume: You are now using a monitor on a 1px wide =1 mm, but I use the monitor 1px wide = two mm, then you define a div width of 100px, you see on the monitor that this div is 10 cm, I see on the monitor is 20 centimeters.The width of the other PX point is not necessarily a 1:1 square, and some devices have a different aspect ratio.
Recent write mobile discovery, when I use REM to give HTML root elements a specified scale value, but will be WebView's built-in browse to add a layer of filtering to enlarge its valueWill eventually affect the REM layout. Finally on the internet for a long time an article written font boosting and my situation is very similar. Https://github.com/jin5354/404forest/issues/33. So he solved it according to his
Just started to touch the mobile page refactoring, is not very confused how much size should be made? 320, 640 or 720? Do you need to write other sizes to fit different screen sizes when you refactor the pages according to the 640 design? - This stems from a viewport and px understanding .A lot of mobile pages have been refactored, but it's unclear why you should design the page in 640 size. Give the element a fixed pixel value, but the strange thing is that it looks pretty much the same size on
REM is used in the project, results in Oppo and 4.0 some browsers REM is not working properly, Font-size calculated PX is always greater than expected value, so add a hackvar docel = doc.documentelement,resizeevt = ' orientationchange ' in window? ' Orientationchange ': ' Resize ',Recalc = function () {var clientwidth = docel.clientwidth;if (!clientwidth) return;docEl.style.fontSize = * (clientwidth/320) +
/*** REM Calculation: Design Figure size px/100 = actual REM Example: 100px = 1rem*/!function (window) { /* Design Document Width */ var docwidth =750; var doc =Window.document,Docel = Doc.documentelement,RESIZEEVT =' Orientationchange 'InchWindow?' Orientationchange ':' Resize '; var Recalc = (functionRefreshrem () { var clientwidth = Docel.getboundingclientrect (). width; /* 8.55: Less than 320px no longe
/** * @remValue: @px/@ue-width*10; @pxToRem: ~ "@{remvalue}rem";} /* Use */ { . Px2rem (+); Width: @pxToRem; height: @pxToRem;}The wording is limited, only one value in a class can be converted, and continuous use will be resolved by the last computed REM value.Use multiple times to set the class name multiple times. Burden.Record it first. Later there is a more optimized way to revise again. Less-M
This time to do a few mobile version of the project, because there is no frame, so use REM to adapt, the following shareThe first is a relatively simple code(function (Win) {Resizeroot ();function Resizeroot () {var wwidth = document.documentElement.clientWidth;if (Wwidth > 640) wwidth = 640;else if (Wwidth Document.documentElement.style.fontSize = wwidth * 0.0625 + ' px '}Window.onresize = Resizeroot}) (window);The second Kind!function (window) {/* D
(function (Win) { var doc = win.document; var docel = doc.documentelement; var tid; function Refreshrem () { var width = docel.getboundingclientrect (). width; if (Width > 640) {//Max width = 640; } var rem = WIDTH/10; Divide the screen width into 10 parts, 1 parts for 1rem docEl.style.fontSize = rem + ' px '; } Win.adde
下载本项目，比如：git clone https://github.com/flashlizi/cssrem进入packages目录：Sublime Text -> Preferences -> Browse Packages...复制下载的cssrem目录到刚才的packges目录里。重启Sublime Text。ConfigurationParameter profiles: Sublime Text, Preferences, package Settings, cssrem.sublime-settings The unit ratio of PX_TO_REM-PX to REM, which defaults to 40. MAX_REM_FRACTION_LENGTH-PX to the maximum length of the number of parts of REM
Today, a friend in the group uploaded a case, point into the study, found REM this unit.Then I began to rem Baidu, found a few good articles, to share with you, The following code is copied in a friend's case About var base_font_size = 100;explained as follows:The value of the root element can be defined arbitrarily,But the minimum definition of 20px is recommended,Also have the definition of the time t
First: The difference between the Px,em,rem. PX is an absolute font sizeEM is the relative font size calculated based on the cardinality (for example: 1.5em). This cardinality is multiplied by the current object from its parent to the genetic font size.REM is computed based on the font size of the root node, such as HTML. First say EM if your default parent container font is 16PX, then 2em=2*16px rem defa
rem vs em As the relative length unit of two, are based on a multiple relationship length, but the reference is not the same, here the case analysis of the difference between the two:1,em reference Multiples object is its own font size, font-size, if not inherited upward;2,rem The reference multiplier object is the root element Case code: Use:If you are multiplying the size of the parent element, you ca
16px*62.5%=10px, so 12px=1.2em, 10px=1em, That means you just have to divide your original PX value by 10 and then put EM in as the unit. Because EM is calculated relative to the parent element, each layer inherits the EM value from the parent element, so that the value of EM is not fixed, in the case of multiple layers of nesting. Html: Css: body { font-size:14px; } div { font-size:1.2em; } 4. rem EM problem: Child element settings, need to
In the low version of the Android phone browser, if the page is executed quickly, the calculation width will appear incorrectly, the solution is to be executed in the OnLoad method, but this solution in some high-version browser will appear in the page flashing, so use to determine the browser version of the way to solve, That is, the version of the browser using the Document.ready method of execution, other high-version phones do not need to use, of course, to determine the iOS phone, iOS phone
Converting rem width and height does not take effect. The minimum chrome font size is 12px and chrome12px. At present, many front ends use rem to Unit Element and font size. The general setting is Html { Font-size: 62.5%; } Conversion source 1rem = 16px 10/16 = 0.625 In this way, 10px is equal to 1rem. 1.4rem = 14px (this is a good conversion) 1.6rem = 16px (this is a good conversion) One problem in chrome
Adaptivejs principle:利用rem布局，根据公式 html元素字体大小 = document根节点(html)宽度 * 100 / 设计图宽度 计算html元素的font-size,使1rem等于100px,方便快速开发 开发时，一个div设计图宽度为89px,那么在css中我们可以这样书写：width:0.89rem; Github:https://github.com/finance-sh/adaptiveAdaptivejs Source:(function(Win, Lib) {varDoc =win.document; varDocel =doc.documentelement; varDevicepixelratio =Win.devicepixelratio; varDPR = 1;//the correspondence between physical pixels and logical pixels varscale = 1;//CSS Pix
In the usual web site to write code when the general use of PX, in the previous study on a little learning about the EM, rem knowledge, but because has not been used, so almost all forgotten. Today in the study of some knowledge of the use of EM, so deliberately to learn the knowledge summed up.1.emEM is the relative length unit, relative to the font size in the yourselves object. For example, in a div font-size set to 20px, then 1em is equivalent to
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