如何使用JavaScript调用API，JSON或AJAX [关闭]

Question

搜索类型：方法：POST

网址：HTTP：// beta.etruckingsoft.com:8800/contact/searchContacts

身体：

{"Company Id" : 2, 
"SearchVal" : "b",
"Contact Type":"Broker",
"token" : "eyJhbGciOiJIUzI1NiJ9.MTkzMA.g132LGIzcwJaJRGa31q-k1hk6u79H0wIj1xjCJzLpZU"}

CONTACT-TYPE : application/json

如何使用JavaScript，AJAX或JSON方法调用这个API？

Answer 1

const xhr = new XMLHttpRequest(), url="http://beta.etruckingsoft.com:8800/contact/searchContacts", method="POST";
const body = {
    "Company Id" : 2,
    "SearchVal" : "b",
    "Contact Type":"Broker",
    "token" : "eyJhbGciOiJIUzI1NiJ9.MTkzMA.g132LGIzcwJaJRGa31q-k1hk6u79H0wIj1xjCJzLpZU"
};
xhr.open(method, url, true);
    xhr.onreadystatechange = () => {
        if(xhr.readyState === 4 && xhr.status === 200)
            console.log(xhr.responseText);
    };
xhr.setRequestHeader("Content-type", "application/json;charset=UTF-8");
xhr.send(JSON.stringify(body));