web-projects/CSS_Notes.txt at master · ptyadana/web-projects · GitHub

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*** New Project for CSS ***

1) reset the margin, padding and box-sizing and global html declaration
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html{
    background-color: #fff;
    color: #555;
    font-family: 'Lato', 'Arial', sans-serif;
    font-weight: 300;
    font-size: 20px;
    text-rendering: optimizeLegibility;
}

2) for html, import normalize css.

<link rel="stylesheet" type="text/css" href="vendors/css/normalize.css">


3) import Grid system.


----------------------------
*** Selector ***

3 types of selector and 4 ways of doing it

- tag selector
- class selector
	- class element selector
- id selector

----------------------------

*** Tag Selector ***

Using tag selector, it applies to all items with this tag. example h1

h1 {
  color: green;
}

----------------------------

*** class Attribute Selector ***

It is very useful and can applies to all items using this class. Multiple items can use the same class.
You can use multiple classes at once and order doesn't matter.

.book-summary {
  color: blue;
}

Example:

.right {
  text-align: right;
}

<div class="right"> </div>
<p class="hightlight module right"></p>

----------------------------

*** class element selector style ***

If we don't want to create another class to manage the style of <img> tag, we can use like that. Append the class name with element tag.

<div class="author-box">
	<img src="author.jpg" alt="author photo">
	<p class='author-text'>Yadana</p>
</div>


.author-box img{
	height: 100px;
	width: 100px;
	border-radius: 50%;
	float:left;
}

----------------------------
*** id attribute selector ***

One Unique id attribute selector can only exist in one page. If another item wants to use the same style, it needs to have different unique id name.

#site-description {
  color: red;
}


----------------------------

*** CSS Unites ***

2 types => Absolute , Relative

When describing the width of the road,
Absolute is like 7.2 meter
RElative is like 2 cars wide

Abosolute unit in CSS : px, mm, cm, in

Relative unit in CSS: %, em, rem, pt, pc (pica), ex, ch, vw, vh, vmin,vmax

-----------------------------

*** Colors ***

Red 	0,255
Green 	0,255
Blue	0,255

body{
	background-color: rgb(255,0,255);
}

** Transparant Setting as 4th parameter **
rgb(255,0,255,0.45)


** Hexadecimal **

Red 	00,FF
Green 	00,FF
Blue 	00,FF

body{
	background-color: #ff00ff;
}

** Shorthand Hexadecimal **

body{
	background-color: #00f;
}


------------------------------

** Adding style sheet to HTML **

<head>
  <title>My Webpage</title>
  <!-- ... -->
  <link href="path-to-stylesheet/stylesheet.css" rel="stylesheet">
  <!-- ... -->
</head>

----------------------------

*** CSS Box Model ***

Content			: text, images, etc

Padding			: transparent area around the content, inside the box.

Border			: goes around the padding and the content.

Margin			: space between the boxes.

box-sizing:boder-box 	=> defining the width and height of the entire box.


---------------------------

*** Two Types of Elements ***

Block Elements		: p, div, h1, h2, etc

Inline element		: link, underline text, etc

---------------------------

*** Resetting the default margin and padding ***

use the selector * to select all elements

*{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
---------------------------

*** float ***

With float property, element can be pushed to the left or to the right.

float:left

---------------------------

*** to auto align or center the element **

can use margin-left and margin-right as auto, which will make div or element as center.

.container{
	width: 1140px;
	margin-left: auto;
	margin-right: auto;
}

---------------------------

*** Margin ***

margin: top right bottom left

	margin-top: 20px;
	margin-left: auto;
	margin-right: auto;

	is same as

	margin: 20px auto 0 auto;

---------------------------

*** Border **

Border can be used to define 3 things.
-border width
-line type
-color

border-top: 1px solid #333;		(width,lineType,color)

---------------------------

*** to make image or element round ***

border-radius: 50%;

---------------------------

*** Relative & Absolute Positioning ***

always set the partent class of the absolute class as relative.

.parent{
	position: relative;
}

.child{
	position: absolute;
}

---------------------------

*** to have slow transitions like button color changing ****

transition: background-color 0.2s, border 0.2s, color 0.2s;


.btn:link,
.btn:visited {
    display: inline-block;
    padding: 10px 30px;
    font-weight: 300;
    text-decoration: none;
    border-radius: 200px;
    transition: background-color 0.2s, border 0.2s, color 0.2s;
}

---------------------------