問題描述

怎么才可以讓返回成功的函數(shù)：success寫到它的參數(shù)內(nèi)部，

function success(data){ console.log(data);}jsonp({ url:’https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su’, type:’get’, data:{wd:’jsonp’ }, callback :’cb’, success:success});function jsonp(options){ var url = options.url; var data = options.data; format(data,options,function(str,callback){var oBody = document.getElementsByTagName(’body’)[0];var oScript = document.createElement(’script’);oScript.setAttribute(’src’,url+’?’+str + options.callback+’=’+callback);oBody.appendChild(oScript); }); return options.success;};function format(data,options,callback){ var callbackName = ’’; var str = ’’; for(var p in data){//格式化get提交的參數(shù)str += p+’=’+data[p]+’&’; } for(var p in options){if(options[p] == options.success){//取出要返回的函數(shù)名 callbackName = p; callback && callback(str,callbackName);} }}如果是這么寫success:function(data){conosle.log(data);}會報(bào)一個(gè)success is undefined錯誤

問題解答

https://jsfiddle.net/hsfzxjy/...

jsonp({ url: ’https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su’, type: ’get’, data:{wd: ’jsonp’ }, callback: ’cb’, success: function (data) { console.log(data) }});function jsonp (options) { let url = options.url let data = options.datalet oBody = document.getElementsByTagName(’body’)[0] let oScript = document.createElement(’script’)let callbackName = ’cb’ + (~~(Math.random()*0xffffff)).toString(16) window[callbackName] = function (result) {options.success(result) } data[options.callback] = callbackNameoScript.setAttribute(’src’, url + ’?’ + format(data)) oBody.append(oScript)}function format(data) { let str = ’’ for (var p in data) {str += encodeURIComponent(p) + ’=’ + encodeURIComponent(data[p]) + ’&’ } return str}