Bottleneck and occupation bottleneck

Bottleneck and occupation bottleneck

I like Zhang xinxu's big blog. I 've been reading this world for a long time. Recently, my status is a bit wrong. I went back and read his blog about the bottleneck in CSS learning.

Personal experience

Let's talk about your personal experience first. The front-end is based on html, css, and js. My personal understanding is that html is the skeleton, css is the clothes, and js is the action. Therefore, writing a good html structure is the most basic. Css is easy to get started.

• Position relative, absolute,
• Floating, clear floating,
• Box Model, elastic box
• Css genie

At the beginning, I felt like I was new every day, and I was getting started with new knowledge every day. Later I was new every month. I wanted to see the effects, frameworks, and use them by myself. Now I feel a little impetuous. I have not learned new things as quickly as I used.

Big points

Going back to the big blog, I am talking about bottleneck 1... This article is really worth seeing. I haven't written anything for a long time, so I can't express myself now. Now I am trying to write my blog.

Now, let's answer a few questions:

What are the default margin values of dl, dt, and dd tag browsers? Is there any label with bold text by default?

dl {display: block;-webkit-margin-before: 1em;-webkit-margin-after: 1em;-webkit-margin-start: 0px;-webkit-margin-end: 0px;}dt {display: block;}dd {display: block;-webkit-margin-start: 40px;}

This is a self-written demo that is copied and pasted in chrome. In fact, dt has no default margin value, and these things have never been followed by me...

What is the difference between line-height: 150% and line-height: 1.5?

<! DOCTYPE html> Line-height
You can change the line-height of the demo above to see the effect.
Why does float collapse the height of an external container? Is this a bug?
A little big float we cleared together in those years
P.s. this seems to have been the last week or last week. I haven't finished writing it in half, and then I put it aside. Let's get it out first. Why is vertical-align like IE7 or IE8, in IE9, the performance is different? What is the rendering mechanism ?" This problem is not answered.