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'use strict';
function combinedKey(parentKey, elKey) {
return parentKey + '.' + elKey;
}
function buildFormData(formData, data, parentKey) {
if (Array.isArray(data)) {
data.forEach(function buildArray(el, i) {
buildFormData(formData, el, combinedKey(parentKey, i));
});
} else if (
typeof data === 'object' &&
!(data instanceof File || data === null)
) {
Object.keys(data).forEach(function buildObject(key) {
buildFormData(
formData,
data[key],
parentKey ? combinedKey(parentKey, key) : key
);
});
} else {
if (data === undefined) {
return;
}
var value =
typeof data === 'boolean' || typeof data === 'number'
? data.toString()
: data;
formData.append(parentKey, value);
}
}
/**
* convert a data object to FormData
*
* type FormDataPrimitive = string | Blob | number | boolean
* interface FormDataNest {
* [x: string]: FormVal
* }
*
* type FormVal = FormDataNest | FormDataPrimitive
*
* @param {FormVal} data
*/
module.exports = function getFormData(data) {
var formData = new FormData();
buildFormData(formData, data);
return formData;
};
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