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HomeWeb Front-endJS TutorialCode to modify CSS attributes with JavaScript_javascript skills

Modifying CSS properties with JavaScript only requires writing native JavaScript.

1. Use JS to modify the class attribute value of the tag:

The class attribute is one of the ways to reference a style sheet on the tag, and its value is a style sheet selector, if the value of the class attribute is changed, the style sheet referenced by the tag will also be changed, so this is the first modification method.

The code to change the class attribute of a tag is:

document.getElementById( id ).className = string;
document.getElementById( id ) is used to get the DOM corresponding to the tag Object, you can also obtain it using other methods. className is a property of the DOM object that corresponds to the label's class attribute. String is the new value of the class attribute, which should be a defined CSS selector.

Using this method, you can replace the CSS style sheet of the tag with another one, or you can apply the specified style to a tag that does not have a CSS style applied.

Example:

Copy code The code is as follows:

< ;style type="text/css">
.txt {
font-size: 30px; font-weight: bold; color: red;
}

Welcome!





2. Use JS to modify the style attribute value of the tag:

The style attribute is also one of the ways to reference the style sheet on the tag, and its value is a CSS style sheet. The DOM object also has a style attribute, but this attribute itself is also an object. The attributes of the Style object correspond to the CSS attributes one-to-one. When the attributes of the Style object are changed, the CSS attribute value of the corresponding tag will also change, so this is The second modification method.

The code to change the CSS attribute of a label is:

document.getElementById( id ).style.property name = value;
document.getElementById( id ) is used to obtain the label corresponding You can also obtain the DOM object using other methods. style is a property of the DOM object, which is itself an object. Property name is the property name of the Style object, which corresponds to a certain CSS property.

Note: This method modifies a single CSS property. It does not affect the values ​​of other CSS properties on the label.

Example:

Copy code The code is as follows:

div id="t2">Welcome!


> ;


> ;



Method:
What are all the properties in document.getElementById("xx").style.xxx
盒子标签和属性对照
CSS语法(不区分大小写) JavaScript语法(区分大小写)
border border
border-bottom borderBottom
border-bottom-color borderBottomColor
border-bottom-style borderBottomStyle
border-bottom-width borderBottomWidth
border-color borderColor
border-left borderLeft
border-left-color borderLeftColor
border-left-style borderLeftStyle
border-left-width borderLeftWidth
border-right borderRight
border-right-color borderRightColor
border-right-style borderRightStyle
border-right-width borderRightWidth
border-style borderStyle
border-top borderTop
border-top-color borderTopColor
border-top-style borderTopStyle
border-top-width borderTopWidth
border-width borderWidth
clear clear
float floatStyle
margin margin
margin-bottom marginBottom
margin-left marginLeft
margin-right marginRight
margin-top marginTop
padding padding
padding-bottom paddingBottom
padding-left paddingLeft
padding-right paddingRight
padding-top paddingTop
颜色和背景标签和属性对照
CSS 语法(不区分大小写) JavaScript 语法(区分大小写)
background background
background-attachment backgroundAttachment
background-color backgroundColor
background-image backgroundImage
background-position backgroundPosition
background-repeat backgroundRepeat
color color
 
样式标签和属性对照
CSS语法(不区分大小写) JavaScript 语法(区分大小写)
display display
list-style-type listStyleType
list-style-image listStyleImage
list-style-position listStylePosition
list-style listStyle
white-space whiteSpace
 
文字样式标签和属性对照
CSS 语法(不区分大小写) JavaScript 语法(区分大小写)
font font
font-family fontFamily
font-size fontSize
font-style fontStyle
font-variant fontVariant
font-weight fontWeight
 
文本标签和属性对照
CSS 语法(不区分大小写) JavaScript 语法(区分大小写)
letter-spacing letterSpacing
line-break lineBreak
line-height lineHeight
text-align textAlign
text-decoration textDecoration
text-indent textIndent
text-justify textJustify
text-transform textTransform
vertical-align

verticalAlign 

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