<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>jsonp</title>
</head>
<body>
<script>
function jsonp(url, data = {}, callback = 'callback') {
let params = []
for (let key in data) {
params.push(key + '=' + data[key])
}
console.log(params.join('&'))
let script = document.createElement('script')
script.src = url + '?' + params.join('&')
document.body.appendChild(script)
return new Promise((resolve, reject) => {
window[callback] = (data) => {
try {
resolve(data)
} catch (e) {
reject(e)
} finally {
console.log(script)
}
}
})
}
jsonp('http://photo.sina.cn/aj/index', {
page: 1,
cate: 'recommend'
}, 'jsoncallback').then(data => {
console.log(data)
})
</script>
</body>
</html>
