What is the reason why the js script tag sends cross-domain requests and does not enter the callback?

< script
type= "text/javascript"
defer= "defer"
src= "http://localhost:8080/cqpt/ueditor/exec?action=config&callback=bd__editor__e3zw61"

< / script >
send such a request using the script tag
http://localhost:8080/cqpt/ueditor/exec?action=config&callback=bd__editor__e3zw61
Window object also has a method mounted

the backend request was accepted successfully, and the data in json format was returned.

but the receptionist always cannot receive the returned information. What is the situation?

method of ueditor dojsonp used

returned data format
{

"videoMaxSize":102400000,
"videoActionName":"uploadvideo",
"fileActionName":"uploadfile",
"fileManagerListPath":"/ueditor/jsp/upload/file/",
"imageCompressBorder":1600,
"imageManagerAllowFiles":[],
"imageManagerListPath":"/ueditor/jsp/upload/image/",
"fileMaxSize":51200000,
"fileManagerAllowFiles":[],
"fileManagerActionName":"listfile",
"snapscreenInsertAlign":"none",
"scrawlActionName":"uploadscrawl",
"videoFieldName":"upfile",
"imageCompressEnable":true,
"videoUrlPrefix":"",
"fileManagerUrlPrefix":"",
"catcherAllowFiles":[],
"imageManagerActionName":"listimage",
"snapscreenPathFormat":"/ueditor/jsp/upload/image/{yyyy}{mm}{dd}/{time}{rand:6}",
"scrawlPathFormat":"/ueditor/jsp/upload/image/{yyyy}{mm}{dd}/{time}{rand:6}",
"scrawlMaxSize":2048000,
"imageInsertAlign":"none",
"catcherPathFormat":"/ueditor/jsp/upload/image/{yyyy}{mm}{dd}/{time}{rand:6}",
"catcherMaxSize":2048000,
"snapscreenUrlPrefix":"",
"imagePathFormat":"/uploadfile/{yyyy}{mm}{dd}/{time}{rand:6}",
"imageManagerUrlPrefix":"",
"scrawlUrlPrefix":"",
"scrawlFieldName":"upfile",
"imageMaxSize":2048000,
"imageAllowFiles":[],
"snapscreenActionName":"uploadimage",
"catcherActionName":"catchimage",
"fileFieldName":"upfile",
"fileUrlPrefix":"",
"imageManagerInsertAlign":"none",
"catcherLocalDomain":[],
"filePathFormat":"/ueditor/jsp/upload/file/{yyyy}{mm}{dd}/{time}{rand:6}",
"videoPathFormat":"/ueditor/jsp/upload/video/{yyyy}{mm}{dd}/{time}{rand:6}",
"fileManagerListSize":20,
"imageActionName":"collect/uploadFile",
"imageFieldName":"upfile",
"imageUrlPrefix":"http://127.0.0.1:8080/cqpt",
"scrawlInsertAlign":"none",
"fileAllowFiles":[],
"catcherUrlPrefix":"",
"imageManagerListSize":20,
"catcherFieldName":"source",
"videoAllowFiles":[]

}