What are ajax selectors?

ajax is not a selector. When using ajax, you will use selectors such as element selectors, class selectors, ID selectors, attribute selectors, descendant selectors, and child element selectors. Detailed introduction: 1. Element selector, use the element name as the selector to select matching elements, use "$("p")" to select all paragraph elements; 2. Class selector, use the class name as the selector, To select elements with a specific class name, use "$(".classname")" to select elements with classname and so on.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

In front-end development, Ajax (Asynchronous JavaScript and XML) is a technology used for asynchronous communication with the server in the background. It allows a web page to update part of the page content by sending an HTTP request and processing the response without refreshing the entire page.

Ajax itself is not a selector, it is a technology used for asynchronous communication. However, when using Ajax for data request and processing, we usually use selectors to select DOM elements in order to operate or update them.

When using Ajax, we can use the following common selectors to select DOM elements:

1. Element Selector: Use the element name as the selection tool to select matching elements. For example, use $("p") to select all paragraph elements.

2. Class Selector: Use the class name as the selector to select elements with a specific class name. For example, use $(".classname") to select elements with classname.

3. ID Selector: Use the ID of the element as a selector to select elements with a specific ID. For example, use $("#idname") to select elements with idname ID.

4. Attribute Selector: Use the attribute value of the element as the selector to select elements with specific attribute values. For example, use $("[attribute=value]") to select elements with a specific attribute value.

5. Descendant Selector: Separate two selectors with a space to select the descendant elements of the first selector. For example, use $("div p") to select all p elements within the div element.

6. Child Selector: Use > to separate two selectors, indicating that the direct child element of the first selector is selected. For example, use $("ul > li") to select all direct child elements li under the ul element.

These selectors can be used in conjunction with Ajax technology to select specific DOM elements and update or manipulate those elements in the response to an Ajax request. By using the selector, we can easily select the DOM element that needs to be updated, then use Ajax to request the data, and then update the data to the selected element.

It should be noted that the use of selectors depends on specific needs and page structure. In actual development, select appropriate selectors as needed to select and operate DOM elements to achieve the required functions and effects.

In summary, Ajax itself is not a selector, it is a technology used for asynchronous communication. But when using Ajax, we usually use selectors to select DOM elements for operation or update. Common selectors include element selectors, class selectors, ID selectors, attribute selectors, descendant selectors and child element selectors.

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