Build a Cargo Manifest Validator - Build a Cargo Manifest Validator

yulebynn · May 22, 2026, 1:22pm

Tell us what’s happening:

If the input manifest object is valid, your validateManifest function should return an empty object {}.
If the input manifest object is not valid, your validateManifest function should return an object describing missing and/or invalid properties.

are not passing even though I have tried not allowing invalid inputs. i don’t know what is wrong.

Your code so far

function validateManifest(manifest) {
  const errors = {};

  // CONTAINER ID
  if (
    !Object.hasOwn(manifest, "containerId") ||
    manifest.containerId === ""
  ) {
    errors.containerId = "Missing";
  } else if (
    !(
      (typeof manifest.containerId === "number" &&
        Number.isInteger(manifest.containerId) &&
        manifest.containerId > 0) ||

      (typeof manifest.containerId === "string" &&
        manifest.containerId.trim() !== "")
    )
  ) {
    errors.containerId = "Invalid";
  }

  // DESTINATION
  if (!Object.hasOwn(manifest, "destination")) {
    errors.destination = "Missing";
  } else if (
    typeof manifest.destination !== "string" ||
    manifest.destination.trim() === ""
  ) {
    errors.destination = "Invalid";
  }

  // WEIGHT
  if (!Object.hasOwn(manifest, "weight")) {
    errors.weight = "Missing";
  } else if (
    typeof manifest.weight !== "number" ||
    !Number.isInteger(manifest.weight) ||
    manifest.weight <= 0
  ) {
    errors.weight = "Invalid";
  }

  // UNIT
  if (!Object.hasOwn(manifest, "unit")) {
    errors.unit = "Missing";
  } else if (manifest.unit !== "kg") {
    errors.unit = "Invalid";
  }

  // HAZMAT
  if (!Object.hasOwn(manifest, "hazmat")) {
    errors.hazmat = "Missing";
  } else if (typeof manifest.hazmat !== "boolean") {
    errors.hazmat = "Invalid";
  }

  if(Object.keys(errors).length === 0){
      return {};
  };

  return errors;
}

Your browser information:

User Agent is: Mozilla/5.0 (X11; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0

Challenge Information:

Build a Cargo Manifest Validator - Build a Cargo Manifest Validator

GitHub Link: freeCodeCamp/curriculum/challenges/english/blocks/lab-cargo-manifest-validator/69a56b5069ca99f7317e6e19.md at main · freeCodeCamp/freeCodeCamp · GitHub

dhess · May 22, 2026, 1:47pm

Hi @yulebynn,

If manifest.containerId is an empty string, does that mean the property is missing?

Happy coding!

yulebynn · May 22, 2026, 2:29pm

Yes. If the input is an empty string it should hit the Missing. Is it not supposed to do that?

dhess · May 22, 2026, 2:30pm

No. It is not missing; it is invalid then.

yulebynn · May 22, 2026, 2:33pm

I’m afraid I’m not understanding you. If the input for containerId is empty string yes, it’s invalid and it will being taken care of by !Object.hasOwn(manifest, “containerId”) ||
manifest.containerId === “” as far as I’m seeing.

yulebynn · May 22, 2026, 2:48pm

I discovered I’m using my outdated code. Here’s my new one but its still not passing these two:

If the input manifest object is valid, your validateManifest function should return an empty object {}.
17.If the input manifest object is not valid, your validateManifest function should return an object describing missing and/or invalid properties.

const manifestSample = {
  containerId:  "string", // allows string and number
  destination: "0", // allows string
  weight: "string", // valid number that is not a float or negative or 0
  unit:  "string", //only allows "kg"
  hazmat:  "string", //only allows
}const


function validateManifest(manifest){
  const errors = {};
  
  const id = manifest.containerId;
  const des = manifest.destination;
  const we = manifest.weight;
  
  // CONTAINER ID
  if (!Object.hasOwn(manifest, "containerId") || (typeof id === "string" && id.trim() === "")){
    errors.containerId = "Missing";
  }else if(id == undefined || id <= 0){
    errors.containerId = "Invalid";
  }else if(typeof id === "number" && !Number.isInteger(id)){
    errors.containerId = "Invalid";
  }

  // DESTINATION
  if(!manifest.destination){
    errors.destination = "Missing";
  }else if (typeof des === "string" && des.trim() === ""){
    errors.destination = "Invalid";
  }else if(typeof manifest.destination === "number"){
    errors.destination = "Invalid";
  };

  // WEIGHT
  if(manifest.weight <= 0 ||Number.isNaN(we) || typeof we === "string"){
    errors.weight = "Invalid";
  }else if(!manifest.weight || manifest.weight === "Undefined"){
    errors.weight = "Missing";
  };

  // UNIT
  if(!manifest.unit){
    errors.unit = "Missing";
  }else if (manifest.unit !== "kg"){
    errors.unit = "Invalid";
  };

  // HAZMAT
  if(manifest.hazmat === undefined){
      errors.hazmat = "Missing";
  }else if(typeof manifest.hazmat === "string" || typeof manifest.hazmat === "number" || manifest.hazmat === null){
    errors.hazmat = "Invalid";
  }
    
  if(Object.keys(errors).length === 0){
      return {};
  };

  return errors;
};
  

console.log(validateManifest(manifestSample));
console.log(typeof(manifestSample));

dhess · May 22, 2026, 2:56pm

Each cargo manifest will be represented as an object with the following properties:

containerId: a positive integer identifying the associated cargo container.

destination: a non-empty string (after trimming whitespace) denoting the cargo’s target destination.

weight: a positive number representing the cargo’s weight.

unit: a string describing the units for the cargo’s weight property (either "kg" for kilograms or "lb" for pounds).

hazmat: a boolean value indicating whether hazardous material handling is needed.

Can containerId be either a string or a number? Is “kg” the only valid value for unit? Can hazmat be a string?

Please carefully review all of the instructions and user stories, then try again.

yulebynn · May 22, 2026, 4:50pm

Tell us what’s happening:

I have no clue how to check whether the unit is “kg” OR “lb” only. I think this is not working else if(manifest.unit !== "kg" || manifest !== "lb")

Your code so far

const manifest1 = {
  containerId: 1, // numbers only
  destination: "santa cruz", // string only
  weight: 560, //numbers only
  unit: "lb", 
  hazmat: false, 
}

function validateManifest(manifest){
  const errors = {};
  
  // CONTAINER ID
  if(!Object.hasOwn(manifest, "containerId")){
    errors.containerId = "Missing";
  }else if(typeof manifest.containerId !== "number" || (typeof manifest.containerId === "string" &&manifest.containerId.trim() === "") || !manifest.containerId || manifest.containerId <= 0 || !Number.isInteger(manifest.containerId)){
    errors.containerId = "Invalid";
  };
  
  
  // DESTINATION
  if(!Object.hasOwn(manifest, "destination")){
    errors.destination = "Missing";
  }else if(typeof manifest.destination !== "string" || (typeof manifest.destination === "string" &&manifest.destination.trim() === "") || !manifest.destination){
    errors.destination = "Invalid";
  };

  // WEIGHT
  if(!Object.hasOwn(manifest, "weight")){
    errors.weight = "Missing";
  }else if(typeof manifest.weight !== "number" || (typeof manifest.weight === "string" && manifest.weight.trim() === "") || !manifest.weight || !Number.isInteger(manifest.weight) || manifest.weight <= 0){
    errors.weight = "Invalid";
  }; 

  // UNIT
  if(!Object.hasOwn(manifest, "unit")){
    errors.unit = "Missing";
  }else if(typeof manifest.unit !== "string" || (typeof manifest.unit === "string" && manifest.unit.trim() === "") || !manifest.unit || manifest.unit === "pounds"){
    errors.unit = "Invalid";
  }else if(manifest.unit !== "kg" || manifest !== "lb"){
    errors.unit = "Invalid";
  }; 

  // HAZMAN
  if(!Object.hasOwn(manifest, "hazmat")){
    errors.hazmat = "Missing";
  }else if(typeof manifest.hazmat !== "boolean" || (typeof manifest.hazmat === "string" && manifest.hazmat.trim() === "")){
    errors.hazmat = "Invalid";
  }; 

  if(Object.keys(errors).length === 0){
    return {};
  }

  return errors;
  
};


console.log(validateManifest(manifest1));
console.log(typeof(manifest1));

Your browser information:

User Agent is: Mozilla/5.0 (X11; Linux x86_64; rv:150.0) Gecko/20100101 Firefox/150.0

Challenge Information:

Build a Cargo Manifest Validator - Build a Cargo Manifest Validator

GitHub Link: freeCodeCamp/curriculum/challenges/english/blocks/lab-cargo-manifest-validator/69a56b5069ca99f7317e6e19.md at main · freeCodeCamp/freeCodeCamp · GitHub

ILM · May 22, 2026, 4:53pm

here you are checking the unit

what are you checking here?

yulebynn · May 22, 2026, 4:55pm

if manifest.unit is not equal to “lb” or “kg”. Like I said I have no idea how to do that, that’s why I am asking here.

ILM · May 22, 2026, 4:56pm

no, look well, are you checking the unit here?

here you are doing so, what’s different?

yulebynn · May 22, 2026, 5:02pm

updated (manifest.unit !== “kg” || manifest.unit !== “lb”) is still counting as Invalid

The unit is still unit: "lb",

ILM · May 22, 2026, 5:06pm

ok, now consider, what is the || doing? and if the unit is that, what will manifest.unit !== "kg" evaluate to?

yulebynn · May 22, 2026, 5:09pm

The problem is the ||. Thanks about that!

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Build a Cargo Manifest Validator - Build a Cargo Manifest Validator

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Tell us what’s happening:

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