Function formDataProxy

src/test/resources/libraries/htmx/htmx-2.0.0/src/htmx.js:3970–4027

* @param {FormData} formData * @returns {Object}

(formData)

   * @returns {Object}
   */
  function formDataProxy(formData) {
    return new Proxy(formData, {
      get: function(target, name) {
        if (typeof name === 'symbol') {
          // Forward symbol calls to the FormData itself directly
          return Reflect.get(target, name)
        }
        if (name === 'toJSON') {
          // Support JSON.stringify call on proxy
          return () => Object.fromEntries(formData)
        }
        if (name in target) {
          // Wrap in function with apply to correctly bind the FormData context, as a direct call would result in an illegal invocation error
          if (typeof target[name] === 'function') {
            return function() {
              return formData[name].apply(formData, arguments)
            }
          } else {
            return target[name]
          }
        }
        const array = formData.getAll(name)
        // Those 2 undefined & single value returns are for retro-compatibility as we weren't using FormData before
        if (array.length === 0) {
          return undefined
        } else if (array.length === 1) {
          return array[0]
        } else {
          return formDataArrayProxy(target, name, array)
        }
      },
      set: function(target, name, value) {
        if (typeof name !== 'string') {
          return false
        }
        target.delete(name)
        if (typeof value.forEach === 'function') {
          value.forEach(function(v) { target.append(name, v) })
        } else {
          target.append(name, value)
        }
        return true
      },
      deleteProperty: function(target, name) {
        if (typeof name === 'string') {
          target.delete(name)
        }
        return true
      },
      // Support Object.assign call from proxy
      ownKeys: function(target) {
        return Reflect.ownKeys(Object.fromEntries(target))
      },
      getOwnPropertyDescriptor: function(target, prop) {
        return Reflect.getOwnPropertyDescriptor(Object.fromEntries(target), prop)
      }
    })
  }