How jquery modifies the css class
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Modify the method: 1, use attr () to set the class attribute value, modify the css class name, syntax "element object .attr (" class "," new class ")"; 2, remove the old class and add a new css class, syntax "element object .removeClass (" old class name "). AddClass (" new class name ")".
The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.
Jquery's method of modifying the css class
Method 1: use attr () to set the class attribute value and modify the css class name
$(document) .ready (function () {$("button") .click (function () {$("p"). Attr ("class", "intro2");}) .intro1 {font-size: 20px; color: red;} .intro2 {font-size: 30px Color: peru;} this is a headline and this is a paragraph.
Modify the css class
Method 2: remove the old class using removeClass () and add the new css class with addClass ()
The removeClass () method removes one or more classes from the selected element.
The addClass () method adds one or more classes to the selected element. This method does not remove the existing class attribute, but simply adds one or more class attributes.
$(document) .ready (function () {$("button") .click (function () {$("p"). RemoveClass ("intro2"). AddClass ("intro1");}) .intro1 {font-size: 20px; color: red;} .intro2 {font-size: 30px Color: peru;} this is a headline and this is a paragraph.
Modify the css class
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