How to use jQuery to modify CSS styles

jQuery is an open source JavaScript library that makes JavaScript development easier and more efficient. By using jQuery, we can use less code to achieve rich interactive effects. Among them, modifying CSS styles is a frequently used function in the jQuery library. In this article, I will discuss how to use jQuery to modify CSS styles and provide some practical examples to illustrate.

1. Basic syntax for modifying CSS styles

In jQuery, we can use the .css() method to modify CSS styles. This method accepts an expression with two parameters, the first parameter is the CSS property, and the second parameter is the value of the property. As shown below:

$('selector').css('property', 'value');

Among them, the selector is used to match the element whose style is to be modified. Can be HTML elements, classes, IDs and attributes. If you need to set the same style for multiple elements, you can use the same selector to match them.

Below we will use some examples to illustrate how to use jQuery to modify CSS styles.

2. Example

1. Set text color:

$('p').css('color', 'red');

This example will set the text color of all paragraph elements to red.

2. Hidden elements:

$('button').click(function(){
$('p').css('display', 'none') ;
});

This example will hide all paragraph elements when the button is clicked.

3. Change the link color:

$('a').mouseenter(function(){
$(this).css('color', 'orange');
}).mouseleave(function(){
$(this).css('color', 'blue');
});

When the mouse is hovering over the link This example will change the link's text color to orange when the mouse leaves it; it will return the link color to blue when the mouse leaves.

4. Change the background color:

$('.box').hover(function() {
$(this).css('background-color', 'yellow ');
}, function() {
$(this).css('background-color', 'white');
});

When the mouse hovers over This example will change the background color of the element to yellow when the element is on; when the mouse leaves, it will return the background color to white.

5. Implement animation:

$('button').click(function(){
$('p').css({

'opacity': 0.5,
'height': '+=50px'

});
});

This example will gradually halve the transparency of all paragraph elements and increase their height by 50 pixels when the button is clicked. In this way, we can use jQuery to achieve animation effects.

3. Summary

Using jQuery to modify CSS styles can make us more convenient and efficient in web development. By using the .css() method, we can quickly modify the style of elements to achieve rich interactive effects. When writing code, we should try to avoid style confusion and code duplication to ensure that our code has good maintainability and readability.

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