<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<button id="get">GET</button>
<br>
<button id="post">POST</button>
<br>
<div id="div"></div>
</body>
</html>
<script>
window.onload = function(){
const get = document.querySelector('#get')
const post = document.querySelector('#post')
const div = document.querySelector('#div')
get.onclick = function(){
console.log('点击了get按钮') //当点击按钮之后这里执行了
let xhr = new XMLHttpRequest()
xhr.onreadystatechange = function(){
console.log('asd') //当点击按钮之后这里没有执行
if(this.readyState == 4 && this.status ==200){
div.innerHTML = this.responseText
}
xhr.open('GET','http://127.0.0.1/api/get?a=1',true) //跨域了，应该会有一个报错吧，但是没反应
xhr.send()
}
}
}
</script>
这样试试看。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<button id="get">GET</button>
<br>
<button id="post">POST</button>
<br>
<div id="div"></div>
</body>
</html>
<script>
window.onload = function () {
const get = document.querySelector('#get')
const post = document.querySelector('#post')
const div = document.querySelector('#div')
get.onclick = function () {
console.log('点击了get按钮') //当点击按钮之后这里执行了
let xhr = new XMLHttpRequest()
xhr.onreadystatechange = function () {
console.log('asd') //当点击按钮之后这里没有执行
if (this.readyState == 4 && this.status == 200) {
div.innerHTML = this.responseText
}
}
xhr.open('GET', 'http://127.0.0.1/api/get?a=1', true) //跨域了，应该会有一个报错吧，但是没反应
xhr.send()
}
}
</script>