Learn about the most popular Ajax controls!

In Web development, Ajax technology allows asynchronous communication between the web page and the server, greatly improving the response speed and user experience of the web page. The Ajax control is a type of tool developed on this basis, which can help us implement various functions more conveniently and improve development efficiency. This article will introduce and analyze some of the more commonly used Ajax controls.

1. jQuery

jQuery is currently the most popular Javascript library. Its Ajax support is very powerful and it is relatively simple to use. Through the courses on MOOC.com, we can also learn some basic usage of jQuery.

$.ajax({

url:"/api/someApi",
type:"POST",
dataType: "json",
data:{
    id:123,
    name:"test"
},
success:function(result){
    console.log(result);
},
error:function(err){
    console.log(err);
}

});

Through the above code we can see that using jQuery to write Ajax requests only requires calling the $.ajax() function , and pass in some parameters to achieve asynchronous communication. Among them, parameters such as url, type, data, and dataType respectively represent the requested URL, request type, request parameters, request data type, etc. At the same time, success and error represent the callback functions after the request succeeds and fails respectively, which can easily handle the response results.

2. Vue.js

Vue.js is currently a popular front-end framework. It not only supports its own AJAX library, but also supports the use of external plug-in axios library. Axios not only has some features of jQuery, such as convenience and simplicity, but also has many powerful functions, such as interceptors, cancellation requests, etc.

Vue.prototype.$http = axios.create({

baseURL: 'https://api.example.com/',
timeout: 1000,
headers: {'X-Custom-Header': 'foobar'}

});

Vue.js supports loading the Axios plug-in into the Vue instance, thus You can quickly use Axios in Vue.js to implement Ajax communication. The specific request method is similar to jQuery.

this.$http.post('/api/someApi', {

id:123,
name:"test"

}).then(response => {

console.log(response);

}, response => ; {

console.log(error);

});

We can see from the above code that using Vue.js and Axios to write Ajax requests requires loading the Axios plug-in into the Vue instance first, and then Use the methods. This method is relatively more complex than jQuery, but it can support more functions.

3. Fetch API

In addition to jQuery and Vue.js, there is another way to use Ajax, and that is native Fetch. The Fetch API allows us to use Ajax without using third-party libraries. The main advantage of Fetch is that it supports Promise, and its code is simpler and clearer than jQuery.

fetch('/api/someApi', {

method: 'POST',
body: JSON.stringify({
    id: 123,
    name: "test"
})

})
.then(response => response.json())
.then(result => ; {

console.log(result);

})
.catch(error => {

console.log(error);

});

Through the above code, we can clearly see , using Fetch to write Ajax requests only requires calling the fetch() function and passing in the request parameters. At the same time, returning content is also very convenient. You only need to use the then() function of Promise to process the response result.

Summary

Through the above introduction and analysis, we know that in front-end development, using Ajax technology for asynchronous communication has become a general trend, and mastering certain Ajax control skills can help us faster Implement many functions efficiently and improve development efficiency. In actual work, appropriate Ajax controls should be selected according to specific situations to create a high-quality website.

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