padding | 易学教程

css3 box-sizing盒模型

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在css盒模型默认的定义里，对一个元素设置width和height只会应用到该元素的的内容区，如果这个元素有任何的border或padding，绘制到屏幕上的宽度和高度会加上border和padding，所以当你调整一个元素的宽度和高度时要时刻注意这个元素的边框和内边距，特别是在做响应式布局时，这个特点更为明显。 box-sizing有两个属性值：　　① content-box：默认值，标准盒子模型。width和height只包含内容的宽和高，不包括边框（border），内边距（padding），外边距（margin）。计算公式：　　　　width = 内容的宽度　　　　 height = 内容的高度　　② border-box： width和 height 属性包括内容，内边距和边框，但不包括外边距。注：border-box不包含margin。　　计算公式：　　　　width = border + padding + 内容的宽度　　　　height = border + padding + 内容的高度示例效果来源： https://www.cnblogs.com/cyfeng/p/11907378.html

HTML link with padding and CSS style active does not work

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HTML link with padding and CSS style active does not work in Google Chrome, Apple Safari, Opera, Mozilla Firefox. However, it works in Internet Explorer 8. Here is an example code. Try to click on Stack - link does not work, click on Overflow - link works. By works I mean - navigate to StackOverflow site. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>css active padding href problem</title> <style type="text/css"> a{ display: inline-block; background:#CCC; border:1px solid #666; padding:0 35px 0 0; } a:active{ padding:0 0 0 35px;

PostgreSQL adds trailing zeros to numeric

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Recently I migrated a DB to PostgreSQL that has some columns defined as numeric(9,3) and numeric(9,4) . In testing the app I have found that when data is saved to these columns there are trailing zeros being added to the value inserted. I am using Hibernate, and my logs show the correct values being built for the prepared statements. An example of the data I am inserting is 0.75 in the numeric(9,3) column and the value stored is 0.750 . Another example for the numeric(9,4) column: I insert the value 12 and the DB is holding 12.0000 . I found this related question: postgresql numeric type

CSS中box-sizing: border-box

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border-box告诉浏览器去理解你设置的边框和内边距的值是包含在width内的。换句话说，如果你将一个元素的width设为100px,那么这100px会包含它的border和padding，内容区的实际宽度会是width减去border + padding的计算值。如何计算的？ width = border + padding + 内容的 width， height = border + padding + 内容的 height。来源： https://www.cnblogs.com/lovekiku123/p/11909327.html

*{ box-sizing: border-box }

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*{ box-sizing: border-box; } Is this a good idea? Any drawbacks? I find this very useful when I want an element to have 100% and some inner padding. Because I don't have to add another element inside for the padding :/ I have started to use this almost always. The Pros , You do not need to calculate out the CSS box-model anymore. You can easily add large padding to an object without have to re-fix your height/width Faster coding of your css (look up SASS if you have not) The cons , IE7 and below have no support, who cares right? Some sadly do. IE8 and up have only partial support. This is how

九十五：CMS系统之cms后台模板渲染

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定义一个宏，用于渲染static文件的时候，只需要传文件名就可以，上下两个“-”是解决渲染的时候源代码换行的情况 {% macro static(filename) -%} {{ url_for('static', filename=filename) }}{%- endmacro %} {% from 'common/_macros.html' import static %}<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>标题</title> <script src="http://cdn.bootcss.com/jquery/3.1.1/jquery.min.js"></script> <link href="http://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> <script src="http://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> <link rel="stylesheet" href="{{ static('css/cms/cms_base.css') }}"> <script src="

CSS盒子模型

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概述：盒子模型属于CSS 三大模块之一，分别是：盒子模型、浮动、定位一、盒子边框之border 　1. 语法描述语法： border-width border-style 设置边框样式 none: 没有边框 solid: 边框为单实线（最为常用） dashed: 边框为虚线 dotted: 边框为点线 double: 边框为双实线 border-color 综合写法：border: 1px blue solid; 　 2. 对表格知识小补充之处理表格的细线边框　　border-collapse: collapse; 合并两个相邻单元格的边框 3.圆形边距border-radius border-radius: 100px; 一个参数代表上下左右 border-radius: 10px 40px; /*左上角和右下角是10px 右上角和左下角是40 （对角线）*/ border-radius: 10px 40px 80px; /*左上角是10px 右上角和左下角是40 右下角是80（按照顺时针走的）*/ border-radius: 10px 40px 80px 100px; /*左上角是10px 右上角40 右下角是80 左下角是100（按照顺时针走的）*/ 二、内边距padding 1. padding用法 padding 属性用于设置内边距，指边框与内容之间的距离

vue 拖拽框架 draggable

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直接使用 npm i -S vuedraggable 页面使用 <template> <div class="addProduct"> <el-dialog title="流程" :visible.sync="addTemplate" width="900px"> <div class="flex"> <div class="addTemplate-left"> <div @click="addType=false">完整三代</div> <div @click="addType=false">完整三代</div> <div @click="addType=false">完整三代</div> <div @click="addType=true">+新增流程</div> </div> <div class="flex addTemplate-content"> <div class="addTemplate-content-left"> <div class="addTemplate-content-left-title">完整三代流程</div> <div style="margin:0 15px 8px 15px;" v-if="addType"> <div style="padding:10px 0;"> <span class="colorRed">*</span>流程名称

边框css

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边框颜色 border-color 边框样式 border-style 边框粗细 border-width 1.外边距margin 2.内边距 padding 3.边框 border Div的真实宽度=width+margin-left+margin-right+border*2+padding-left+padding-right；元素从上到下（主要说块级元素），从左到右（主要说行级元素）的一种排列方式，我们把它叫标准文档流。来源： https://www.cnblogs.com/chuliwei/p/11900238.html

How can I zero just the padding bytes of a class?

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I want to set the padding bytes of a class to 0, since I am saving/loading/comparing/hashing instances at a byte level, and garbage-initialised padding introduces non-determinism in each of those operations. I know that this will achieve what I want (for trivially copyable types): struct Example { Example(char a_, int b_) { memset(this, 0, sizeof(*this)); a = a_; b = b_; } char a; int b; }; I don't like doing that though, for two reasons: I like constructor initialiser lists, and I know that setting the bits to 0 isn't always the same as zero-initialisation (e.g. pointers and floats don't