[Vuejs]-Vuejs/Javascript How to differentiate between XML and JSON file provided in textarea?

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UPDATE:
in your example you are trying JSON.stringify on the response, so logically I assumed that it is an object (not stringified).
If they are both text, you can get them by the pattern as stated in above comments.

if(res.target.result.includes('<')){
// do the xml stuff
} else {
// json stuff
}

if there is a risk that JSON string will contain < too, then you’ll need to further upgrade the if



old answer
you can use `typeof()` where xml will return a string, and object or array will return array or object
```js
this.inputFile = typeof(res.target.result) === 'string' ? res.target.result : JSON.stringify(res.target.result)

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