First of all, the purpose is so that people can directly copy the pictures on other web pages and upload them when using them

codeMirror.on('paste', this.paste.bind(this));

//是不是在paste方法中就会有codemirror 的方法，知道的应该懂
const file = clipboard(e.clipboardData.items);


//上面那个方法就是 
function clipboard(items) {
  let i = 0;
  let item;
  while (i < items.length) {
    item = items[i];
    if (item.type.indexOf('image') !== -1) {
      return item;
    }
    i++;
  }
  return false;
}

In order to get the type of image, right

Here comes the key part

const formData = new FormData();
formData.append('file', file.getAsFile(), 'image.png');

Then I submit it via ajax

tools.ajax({
             url: ajaxProps.action,
             method: 'POST',
             data:formData,
            //  headers:{'Content-Type':'application/json'},
             async: true,
             dataType:ajaxProps.dataType,
             processData: false,
         }).....

The backend is abbreviated as Express. The master must know it
Dead routine

app.use(bodyParser.json());
// app.use(bodyParser.multipart());
app.use(bodyParser.urlencoded({extended: true}));

Then an error was reported

SyntaxError: Unexpected token -
    at parse (C:\Users\wb-yuhaiqing.a\Desktop\discount\web_corpoation\node_modules\.1.17.1@bo
dy-parser\lib\types\json.js:83:15)
    at C:\Users\wb-yuhaiqing.a\Desktop\discount\web_corpoation\node_modules\.1.17.1@body-pars
er\lib\read.js:116:18
    at invokeCallback (C:\Users\wb-yuhaiqing.a\Desktop\discount\web_corpoation\node_modules\.
2.2.0@raw-body\index.js:262:16)
    at done (C:\Users\wb-yuhaiqing.a\Desktop\discount\web_corpoation\node_modules\.2.2.0@raw-
body\index.js:251:7)
    at IncomingMessage.onEnd (C:\Users\wb-yuhaiqing.a\Desktop\discount\web_corpoation\node_mo
dules\.2.2.0@raw-body\index.js:307:7)
略

There is a problem with parsing, what should I do? I have tried many methods on the Internet, such as changing the header without using json. I tried it, but I still enter the bodypaarser.json method, and then get a -- error! !
Please God! Has anyone encountered similar problems