How to write data using jquery

In the process of using jQuery for data transmission, we can use the $.ajax() or $.post() method. The following are two ways of writing data:

1. Use the $.ajax() method to transmit data

Suppose we have a page for submitting a form, which contains name, email and message three fields. We can use the following methods to transmit data in these fields:

$.ajax({
    url: "/submitForm",
    type: "POST",
    data: {
        name: $("#name").val(),
        email: $("#email").val(),
        message: $("#message").val()
    },
    success: function(data) {
        // 请求成功时的代码
    },
    error: function(xhr, status, error) {
        // 请求失败时的代码
    }
});

In the above code, we use the $.ajax() method to transmit data, where:

• url: Indicates the URL where the server receives data;
• type: Indicates the data transmission method, which can be GET or POST;
• data: Indicates the data to be transmitted, which can be a string or object ;
• success: indicates the callback function when the request is successful;
• error: indicates the callback function when the request fails;

Specifically, we will name, The data in the email and message fields are obtained through jQuery's selector, and then they are encapsulated into an object. Next, pass this object as the data parameter to the $.ajax() method. When the server receives this data, it will call the corresponding handler to complete subsequent operations.

2. Use the $.post() method to transmit data

In addition to the $.ajax() method, we can also use the $.post() method to transmit data. The following is an example of using the $.post() method:

$.post("/submitForm", {
    name: $("#name").val(),
    email: $("#email").val(),
    message: $("#message").val()
}, function(data) {
    // 请求成功时的代码
}, "json");

In the above code, we use the $.post() method to transmit data, where:

• url: Represents the URL where the server receives data;
• data: Represents the data to be transmitted, which can be a string or object;
• success: Represents the callback function when the request is successful;
• dataType: Indicates the data type returned by the server, which can be xml, json, script, html or text, etc.

Unlike the $.ajax() method, the $.post() method sets the request method to POST by default, and the data parameter is passed directly to this method. In this way, we can realize data transmission more conveniently.

Summary

Whether you use the $.ajax() method or the $.post() method, they can be used for data transfer, and both are based on the jQuery core library. When we need to send data to the server, we can choose one of the methods and perform the corresponding configuration and operation according to our own needs.

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