I have a multi select input. If ı select any option and send not problem. When not select any value. then send form with empty array. But formData not accept to [].
let formData = new FormData();
formData.append('education_level', []); //not accept
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Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking.Community– Community Bot2022-02-16 06:52:42 +00:00Commented Feb 16, 2022 at 6:52
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2 Answers
The append method only accepts strings or Blob objects (including File objects).
FormData is for use when you're going to provide multipart/form-data. There's no concept of an empty array in multipart/form-data, you just don't include any values for the key at all, and the server should infer that that means any "array" of values it was expecting is empty.
For completeness: If you did have an array of values, you wouldn't do .append("theKey", theArray); instead, you'd append them like this:
for (const value of theArray) {
data.append("theKey", value);
}
All of the values will be included in the result.
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formData.append('education_level',`${[]}`);
