Python API responses with underscores to a sane camelCase response in JS 😊

camelCase.js

const camelCase = obj => {
  let newObj = {}
  for (let key in obj) {
    const currentItem = obj[key]
    if (!obj.hasOwnProperty(key)) continue

    let newKey = key
    while (newKey.includes('_')) {
      newKey = newKey.replace(/_([a-z|1-9])/g, k => k[1].toUpperCase())
    }

    let newItem
    if (Array.isArray(currentItem)) {
      const newArray = []
      for (let item of currentItem) {
        newArray.push(camelCase(item))
      }
      newItem = newArray
    } else if (typeof currentItem === 'object') {
      newItem = camelCase(currentItem)
    }

    newObj = {
      ...newObj,
      [newKey]: newItem || currentItem
    }
  }
  return newObj
}