Hướng dẫn css not overriding

I have a DIV container that is a CSS class defined on the top level. That container also has a style that has a couple elements that should override the main class elements. As far as I understand, this is what it should be doing, but it seems to ignore everything I am putting in there.

/* In the CSS file. */
div.ItemContainer {
    position:absolute;
    left:50px;
    top:15px;
    width:80px;
    height:70px;
}

and In the HTML file:

    Test text.

Am I doing something wrong here? If not, any suggestions on how to get this to work? Thanks.

asked Jul 2, 2010 at 22:56

11

Sometimes things don't cascade correctly in some browsers. Use the !important flag to override behaviour.

style="left: 200px !important; top: 150px !important"

answered Jul 2, 2010 at 23:02

ArenAren

53.4k9 gold badges65 silver badges101 bronze badges

8

Your code seems to be alright. Have a look at the markup language you are using (HTML/XTML...) to see if it has an error such as a unclosed quotes, missing tag or missing end tag. Another thing that could mess up your style is the use of JavaScript for styling. It is a bad practice to use JavaScript for styling! Have a close look at what you are doing with the use of JavaScript for styling.

iScroll

Using iScroll seems to be the source of your problem. You might want to use a JavaScript library that does not mess with CSS. Also, you could try to modify the library or find a way to bypass what ever you are doing with the library.

You might find something useful in these links:

• jQuery TOOLS
• jQuery UI

answered Jul 2, 2010 at 23:05

AlertyAlerty

5,8657 gold badges37 silver badges62 bronze badges

3

try!important

left:200px !important;

answered Jul 2, 2010 at 23:02

AHOYAHOYAHOYAHOY

2,0904 gold badges23 silver badges34 bronze badges

4

I encourage you to read about CSS specificity here in the docs: CSS Specificity: Mozilla Developers and check my answer down below.

Nội dung chính

• Definition and Usage
• Browser Support
• Property Values
• Related Pages
• Styling Links
• Text Decoration
• Background Color
• Link Buttons
• More Examples
• Test Yourself With Exercises

There are several ways to overwrite CSS properties from external libraries.

Case 1: if you're using Bootstrap or Zurb Foundation via npm package, you need to change a variable value that is responsible for given property and place it after importing all library files to ovewrite correctyly eg.

import 'files from library.sass';

// my settings
$default-width: 80%;

Case 2: if you're using CDN to deliver your library you can use a more specific CSS selector to overwrite given property eg:

to overwrite div selector

div {}   ----> div.my-class {}

The second technique, but for sure not recommended is to use !important declaration. But remember, using!important declaration often causes many problems during the development process. It is always better to find a more specific selector than use!important.

I'm assuming that this is happening because the style sheet will only override the attributes that exist in the parent theme and child theme; thus, leaving attributes that are NOT in the child theme, in the parent theme.

That's not how it works. There's nothing special about WordPress parent theme and child theme stylesheets. They're just standard CSS style sheets, and they follow the same rules as any two stylesheets loaded on any other web page.

If you want to "remove" a style from one stylesheet in subsequent stylesheet, you need to provide a new value for it. If you have a position: relative; property, and you want to reset it to its default value you need to use initial:

.mvp-blog-story-img img {
    margin: 0 auto;
    width: 100%;
    min-width: 0px;
    position: initial;
}

Note that initial doesn't work in Internet Explorer, so if IE support is required, you will need to find out what the default value is and set it to that. For position, that's static:

.mvp-blog-story-img img {
    margin: 0 auto;
    width: 100%;
    min-width: 0px;
    position: initial;
}

Note that if the element's position is static then left and right won't do anything, so you don't need to reset those.

To find the default values for properties, the MDN web docs CSS reference is a good resource.

Example

Set different font styles for three paragraphs:

p.a {
  font-style: normal;
}

p.b {
  font-style: italic;
}

p.c {
  font-style: oblique;
}

Try it Yourself »

Definition and Usage

The font-style property specifies the font style for a text.

Show demo ❯

Browser Support

The numbers in the table specify the first browser version that fully supports the property.

CSS Syntax

font-style: normal|italic|oblique|initial|inherit;

Property Values

CSS tutorial: CSS Font

CSS reference: font property

HTML DOM reference: fontStyle property

With CSS, links can be styled in many different ways.

Text Link Text Link Link Button Link Button

Styling Links

Links can be styled with any CSS property (e.g. color, font-family, background, etc.).

In addition, links can be styled differently depending on what state they are in.

The four links states are:

• a:link - a normal, unvisited link
• a:visited - a link the user has visited
• a:hover - a link when the user mouses over it
• a:active - a link the moment it is clicked

Example

/* unvisited link */
a:link {
  color: red;
}

/* visited link */
a:visited {
  color: green;
}

/* mouse over link */
a:hover {
  color: hotpink;
}

/* selected link */
a:active {
  color: blue;
}

Try it Yourself »

When setting the style for several link states, there are some order rules:

• a:hover MUST come after a:link and a:visited
• a:active MUST come after a:hover

Text Decoration

The text-decoration property is mostly used to remove underlines from links:

Example

a:link {
  text-decoration: none;
}

a:visited {
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:active {
  text-decoration: underline;
}

Try it Yourself »

Background Color

The background-color property can be used to specify a background color for links:

Example

a:link {
  background-color: yellow;
}

a:visited {
  background-color: cyan;
}

a:hover {
  background-color: lightgreen;
}

a:active {
  background-color: hotpink;
}

Try it Yourself »

Link Buttons

This example demonstrates a more advanced example where we combine several CSS properties to display links as boxes/buttons:

Example

a:link, a:visited {
  background-color: #f44336;
  color: white;
  padding: 14px 25px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
}

a:hover, a:active {
  background-color: red;
}

Try it Yourself »

More Examples

Example

This example demonstrates how to add other styles to hyperlinks:

a.one:link {color: #ff0000;}
a.one:visited {color: #0000ff;}
a.one:hover {color: #ffcc00;}

a.two:link {color: #ff0000;}
a.two:visited {color: #0000ff;}
a.two:hover {font-size: 150%;}

a.three:link {color: #ff0000;}
a.three:visited {color: #0000ff;}
a.three:hover {background: #66ff66;}

a.four:link {color: #ff0000;}
a.four:visited {color: #0000ff;}
a.four:hover {font-family: monospace;}

a.five:link {color: #ff0000; text-decoration: none;}
a.five:visited {color: #0000ff; text-decoration: none;}
a.five:hover {text-decoration: underline;}

Try it Yourself »

Example

Another example of how to create link boxes/buttons:

a:link, a:visited {
  background-color: white;
  color: black;
  border: 2px solid green;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
}

a:hover, a:active {
  background-color: green;
  color: white;
}

Try it Yourself »

Example

This example demonstrates the different types of cursors (can be useful for links):

auto

crosshair

default

e-resize

help

move

n-resize

ne-resize

nw-resize

pointer

progress

s-resize

se-resize

sw-resize

text

w-resize

wait

Try it Yourself »

Test Yourself With Exercises

Exercise:

Set the color of links to "red".

  
This is a heading
  
This is a paragraph
  This is a link

Start the Exercise