axios basics (6): axios cancel request

In order to test the effect of canceling the request, we need to delay the response of the json-server service.

Realize the startup method of json-server delayed response

json-server --watch db.json -d 2000   

The above 2000 represents a delay of 2s before responding to the service

Method to realize axios cancel request

• Declare a global variable cancel
• When axios requests, configure a cancelToken property, the value of this property is a CancelToken object, and the parameter of the object is a callback function.
• When canceling, just call the cancel function.

Implementation code

// 申明全局变量
let cancel = null;
// 第一个事件：发送请求
btns[0].onclick = function() {
    
    
    axios({
    
    
        method: 'GET',
        url: 'http://localhost:3000/posts',
        // 添加配置对象的属性
        cancelToken: new axios.CancelToken(function(c) {
    
    
            cancel = c;
        })
    }).then(response => {
    
    console.log(response);})
}
// 第二个事件：取消请求
btns[1].onclick = function() {
    
    
    cancel();
}