How to call data with jquery (5 methods)

jQuery is a popular JavaScript library that is widely used in front-end web development. In the process of web development, it is often necessary to request data from the background through Ajax technology and dynamically display the returned data on the page. Therefore, mastering how to call data with jQuery is an essential skill for developers. This article will introduce how jQuery calls data.

1. Using jQuery’s Ajax method

jQuery provides a convenient Ajax method for sending requests to the server and obtaining data. The method is $.ajax(), which can receive an object containing request parameters as a parameter. The following is a simple example:

$.ajax({
  url: 'some.php',
  type: 'POST',
  data: {name: 'John', age: 30},
  success: function(response) {
    console.log(response);
  },
  error: function(jqXHR, textStatus, errorThrown) {
    console.error(textStatus);
  }
});

In the above code, url represents the requested address, type represents the request method (GET or POST), data represents the requested data, and success represents the callback function after the request is successful. error represents the callback function after the request fails.

2. Use jQuery’s get and post methods

In addition to the $.ajax() method, jQuery also provides the get() and post() methods, which can make it easier to send GET and POST request. The following is an example of a GET request:

$.get('some.php', function(response) {
  console.log(response);
});

In the above code, the $.get() method receives two parameters. The first parameter is the requested address, and the second parameter is the callback function after success.

The following is an example of a POST request:

$.post('some.php', {name: 'John', age: 30}, function(response) {
  console.log(response);
});

In the above code, the $.post() method receives three parameters. The first parameter is the requested address, and the second parameter is The requested data, the third parameter is the callback function after success.

3. Use jQuery’s load method

jQuery’s load() method can load data from the server and embed the returned HTML into the specified element. The following is a simple example:

$('#result').load('some.txt');

In the above code, the load() method receives a parameter, indicating the requested address, and the returned HTML will replace the HTML content with the element id of result.

4. Use jQuery’s getJSON method

$.getJSON() method to request JSON data and convert the returned data into a JavaScript object. The following is a simple example:

$.getJSON('some.json', function(data) {
  console.log(data);
});

In the above code, the $.getJSON() method receives two parameters. The first parameter is the requested address, and the second parameter is the callback function after success.

5. Use jQuery’s getScript method

getScript() method can request and execute JavaScript files on the server. The following is a simple example:

$.getScript('some.js', function() {
  console.log('Script loaded.');
});

In the above code, the getScript() method receives two parameters. The first parameter is the address of the requested JavaScript file, and the second parameter is the callback function after success.

6. Summary

This article introduces jQuery’s five methods of obtaining data, namely using the Ajax method, get and post methods, load method, getJSON method and getScript method. These methods are often used by developers in the process of web development. Mastering these skills can complete web development tasks more efficiently.

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