box

BFC的概念及作用

巧了我就是萌 提交于 2020-01-23 18:26:05
在了解什么是BFC之前,首先得明白什么是Box , Formatting Context (一个决定如何渲染文档的容器)的概念 Box: CSS布局的基本单位 Box是 CSS 布局的对象和基本单位, 直观点来说, 就是一个页面是由很多个 Box组成的, 元素的类型和display属性, 决定这个BOX的类型, 不同类型的BOX, 会参与不同的Formatting Context, 因此BOX内的元素会以不同的方式渲染, 其盒子的类型分别为: block-level box:display 属性为 block, list-item, table 的元素,会生成 block-level box。并且参与 block fomatting context; inline-level box:display 属性为 inline, inline-block, inline-table 的元素,会生成 inline-level box。并且参与 inline formatting context,若为block-level box 设置inline-block则会产生BFC run-in box: css3 中才有, 这儿先不讲了 Formatting Context :是W3C CSS2.1规范中的一个概念,它是页面中的一块渲染区域, 并且有一套渲染规则,他觉得了子元素如何定位,

css3 box-sizing属性

五迷三道 提交于 2020-01-23 05:11:24
原文:http://www.cnblogs.com/zhaoran/archive/2013/05/24/3097482.html box-sizing属性可以为两个值之一:content-box(default),border-box。 content-box,border和padding不计算入width之内 border-box,border和padding计算入width之内 ie8+浏览器支持content-box和border-box; ff,google则支持全部两个值。 使用时: -webkit-box-sizing: 100px; // for ios-safari, android -moz-box-sizing:100px; //for ff box-sizing:100px; //for other 栗子: <style type="text/css"> .content-box{ box-sizing:content-box; -moz-box-sizing:content-box; width: 100px; height: 100px; padding: 20px; border: 5px solid #E6A43F; background: blue; } .border-box{ box-sizing:border-box; -moz-box

css3 box-sizing属性

£可爱£侵袭症+ 提交于 2020-01-21 11:42:14
定义和用法 box-sizing 属性允许您以特定的方式定义匹配某个区域的特定元素。 例如,假如您需要并排放置两个带边框的框,可通过将 box-sizing 设置为 "border-box"。这可令浏览器呈现出带有指定宽度和高度的框,并把边框和内边距放入框中。 默认值: content-box 继承性: no 版本: CSS3 JavaScript 语法: object .style.boxSizing="border-box" box-sizing:content-box | border-box 默认值:content-box content-box: padding和border不被包含在定义的width和height之内。对象的实际宽度等于设置的width值和border、padding以及margin之和,即 ( Element width = width + border + padding+margin ) 此属性表现为标准模式下的盒模型。 border-box: padding和border被包含在定义的width和height之内。对象的实际宽度就等于设置的width值,即使定义有border和padding也不会改变对象的实际宽度,即 ( Element width = width ) 此属性表现为怪异模式下的盒模型。 例子: <style type="text

CSS3简单写个圆形进度条动画

萝らか妹 提交于 2020-01-17 22:29:19
圆圈转动完整代码 html <div id="wrap"> <div class="box-left"> <div class="circle-left"></div> </div> <div class="box-right"> <div class="circle-right"></div> </div> </div> css #wrap{ width: 200px; height: 200px; margin: 200px auto; position: relative; border-radius: 50%; } /*底部圆圈*/ #wrap::before{ content: ""; position: absolute; width: 100%; height: 100%; box-sizing: border-box; left: 0; top: 0; border: 10px solid rgba(255,255,255,0.5); border-radius: 50%; } /*左右两个盒子里面各放着一个半圆圈,主要overflow*/ .box-left, .box-right{ width: 50%; height: 100%; box-sizing: border-box; position: absolute; top: 0; overflow:

How to create an alert box without using Tkinter?

五迷三道 提交于 2020-01-17 18:11:32
问题 I need to create a message box in python without using python Tkinter library so that I can use that before using exit() function this will display the message and answer as soon as user presses okay, user gets out of program. 回答1: Here's one way to do it with Windows' msg command. The code is based on @ErykSun's comment under the question Can't execute msg (and other) Windows commands via subprocess. import os import subprocess sysroot = os.environ['SystemRoot'] sysnative = (os.path.join

How to create an alert box without using Tkinter?

只愿长相守 提交于 2020-01-17 18:10:19
问题 I need to create a message box in python without using python Tkinter library so that I can use that before using exit() function this will display the message and answer as soon as user presses okay, user gets out of program. 回答1: Here's one way to do it with Windows' msg command. The code is based on @ErykSun's comment under the question Can't execute msg (and other) Windows commands via subprocess. import os import subprocess sysroot = os.environ['SystemRoot'] sysnative = (os.path.join

Change the reference of a cell in excel?

不问归期 提交于 2020-01-17 03:22:45
问题 Maybe you guys could help me because I'm stumped. Here are some pictures to help illustrate my problem: As you can see, D1 is "referencing" B1. However, because I'm using the INDIRECT function, the actual reference is C1 and the following occurs: The blue reference box is on C1 and not B1. Is there any way to change the blue box so that it surrounds the actual cell being referenced (B1) without actually changing which cell is referenced by the INDIRECT function (C1)? Also, this is just an

深入理解行内元素的布局

我怕爱的太早我们不能终老 提交于 2020-01-16 13:36:29
前言 总括: 本文通过实例讲解CSS中最大的难点之一,行内元素的布局,主要是挖掘line-height和vertical-align两个属性在布局方面的使用。 原文博客地址: 深入理解行内元素的布局 知乎专栏&&简书专题: 前端进击者(知乎) && 前端进击者(简书) 博主博客地址: Damonare的个人博客 白茶清欢无别事,我在等风,也在等你。 ? 正文 讲道理line-height和vertical-align 这对基是十分低调的,日常开发中碰到的很多莫名其妙的bug很大一部分都是这俩货搞出来了的,但很少有人知道这对基的罪恶,因为可能花式改写一下CSS代码问题就解决了。实际上搞明白这俩东西才能让我们在布局工作中游刃有余。本文接下来就通过这对基的关系来了解内联元素具体的布局问题~we are刨根问底拦不住~? ​ 读这篇文章之前请确定您有以下知识基础: line-height的数字值是和font-size大小相关的; vertical-align的百分比值是和line-height值相关的; 引出vertical-align 首先来看一个?: <div class="test"> <img src="https://sfault-avatar.b0.upaiyun.com/344/542/3445428434-5631776c183b2_huge256" alt="">

Apache Kafka - How to Load Test with JMeter

你说的曾经没有我的故事 提交于 2020-01-15 05:51:21
In this article, we are going to look at how to load test Apache Kafka, a distributed streaming platform, by using Apache JMeter™ . First of all, let us study what Kafka is and give a few definitions we will need for further work. A Brief Overview of Apache Kafka In a large distributed system, there are usually a lot of services that generate different events: logs, monitoring data, suspicious user actions, and so on. In Kafka, these are called producers . On the other hand, there are services that need the generated data. These are called consumers . Kafka that solves the problem of

Authenticate with Box Developer Edition using box-python-sdk

一世执手 提交于 2020-01-15 03:51:12
问题 I want to authenticate to Box Developer Edition using box-python-sdk, this way: auth = JWTAuth( client_id='YOUR_CLIENT_ID', client_secret='YOUR_CLIENT_SECRET', enterprise_id='YOUR_ENTERPRISE_ID', rsa_private_key_file_sys_path='CERT.PEM', store_tokens=your_store_tokens_callback_method, ) (1) I have created a private and public key using the App Auth instructions, and decrypted the private key. How do I get the CERT.PEM? (2) What is the your_store_tokens_callback_method supposed to do? 回答1: