把Object轉換為FormData

 

網路上找不到寫好的，或大部分只有一層，所以花了點時間，用遞回自己寫一個，做一下紀錄。

const objectToFormData = (object: RequestParams = {}, formData: FormData = new FormData(), parentKey?: string) => {

Object.keys(object).forEach((key) => {

const currentKey = parentKey ? `${parentKey}[${key}]` : key

if ([Array, Object].includes(object[key].constructor)) {

objectToFormData(object[key], formData, currentKey)

} else {

formData.append(currentKey, object[key])

}

})

return formData

}

// use

for (const pair of objectToFormData({

path: "health_tip",

a: {

a: "a",

b: [1],

},

b: [1, 2, 3],

file,

}).entries()) {

console.log(pair);

}

// result