服务器端:
$cb = $_GET['callback'];
$data = array(
'name'=> 'zs',
'age'=>18,
'gender'=>true
);
echo $cb.'('.json_encode($data).')';
?>
JSONP封装:
function jsonp({ url, params, callback }) {
return new Promise((resolve, reject) ={
let script = document.createElement('script')
window[callback] = function(data) {
resolve(data)
document.body.removeChild(script)
}
params = { ...params, callback } // wd=b&callback=show
let arrs = []
for (let key in params) {
arrs.push(`${key}=${params[key]}`)
}
script.src = `${url}?${arrs.join('&')}`
document.body.appendChild(script)
})
}
jsonp({
url: 'http://localhost:3000/say',
params: { wd: 'Iloveyou' },
callback: 'show'
}).then(data ={
console.log(data)
})