day-15-实现一个jsonp #15
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<!DOCTYPE html>
<html>
<head>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<meta charset="utf-8">
<title>JS Bin</title>
</head>
<body>
<script>
// 转换成链接参数形式
let parseParam = function (param, key) {
var paramStr = ""
if (param instanceof String || param instanceof Number || param instanceof Boolean) {
paramStr += "&" + key + "=" + encodeURIComponent(param)
} else {
$.each(param, function (i) {
var k = key == null ? i : key + (param instanceof Array ? "[" + i + "]" : "." + i)
paramStr += '&' + parseParam(this, k)
})
}
return paramStr.substr(1)
}
function jsonp(url, data = {}, callback) {
return new Promise(function (resolve, reject) {
let reqUrl;
data[callback] = callback
// 对象序列化并和url拼接
reqUrl = url + '?' + parseParam(data)
let script = document.createElement("script")
script.src = reqUrl
$('body').append(script)
if (window[callback]) {
} else {
window[callback] = function (data) {
resolve(data)
}
}
})
}
// ?jsoncallback=fn&page=1&cate=recommend
jsonp('http://photo.sina.cn/aj/index',
{
page: 1, cate: 'recommend'
}, 'jsoncallback')
.then(data => {
console.log(data)
})
jsonp('http://photo.sina.cn/aj/index',
{
page: 2, cate: 'recommend'
}, 'jsoncallback')
.then(data => {
console.log(data)
})
</script>
</body>
</html> |
|
js部分 let parseParam = function (param, key) {
var paramStr = ""
if (param instanceof String || param instanceof Number || param instanceof Boolean) {
paramStr += "&" + key + "=" + encodeURIComponent(param)
} else {
$.each(param, function (i) {
var k = key == null ? i : key + (param instanceof Array ? "[" + i + "]" : "." + i)
paramStr += '&' + parseParam(this, k)
})
}
return paramStr.substr(1)
}
function jsonp(url, data = {}, callback) {
return new Promise(function (resolve, reject) {
let reqUrl;
data[callback] = callback
// 对象序列化并和url拼接
reqUrl = url + '?' + parseParam(data)
let script = document.createElement("script")
script.src = reqUrl
$('body').append(script)
if (window[callback]) {
} else {
window[callback] = function (data) {
resolve(data)
}
}
})
} |
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封装一个
jsonp方法，可以使用如下方式调用The text was updated successfully, but these errors were encountered: