Easily master jQuery basic selectors: 5 minutes quick tutorial!

Easily master the basic jQuery selector: 5 minutes!

With the continuous development of front-end development, jQuery has become one of the widely used front-end frameworks. In jQuery, selectors are a very important concept, which can help us quickly locate and operate elements on the page. This article will introduce the basic selectors of jQuery and guide you to master them easily through specific code examples.

1. ID selector (#id)

The ID selector selects elements through their id attribute. In jQuery, use the # symbol followed by the element's id value to select the element.

// 选择id为myBtn的按钮元素
$("#myBtn").click(function(){
  alert("Hello, World!");
});

2. Class selector (.class)

The class selector selects elements through their class attribute. In jQuery, use the . symbol followed by the class name to select all elements of that class.

// 选择类名为myClass的所有元素
$(".myClass").css("color", "red");

3. Element selector (element)

The element selector can select all elements of the specified type.

// 选择所有p元素并设置背景颜色
$("p").css("background-color", "yellow");

4. Descendant selector (ancestor descendant)

The descendant selector can select all descendant elements under the specified element.

// 选择id为container下所有的p元素
$("#container p").css("font-size", "16px");

5. Child element selector (parent > child)

The child element selector only selects child elements of the specified element.

// 选择类名为menu下直接的子元素ul
$(".menu > ul").addClass("active");

6. Attribute selector ([attribute])

The attribute selector can select elements with specified attributes.

// 选择所有含有title属性的元素并修改文本
$("[title]").text("This is a title");

Through the above simple code examples, we can easily master the use of jQuery basic selectors. With continuous practice and exploration, I believe that everyone can use jQuery selectors with ease in front-end development to improve development efficiency and experience. If you have questions or more needs, you may wish to practice more to deepen your understanding and application of jQuery selectors, and make the road to front-end development smoother!

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