Typescript error:- Property 'forEach' does not exist on type 'string'

Question

whenever i used forEach() i got this error in terminal

[ts] Property 'forEach' does not exist on type 'string'.

My application works in browser properly. Everything works properly but i don't want such errors in terminal.

I used below code for it. Please suggest me what i missing.

 job.forEach(function(state) {
        if((totalcarer['userId']+"")===state.rNo)
        {
          cjobState = state.cJobstatus;
        }
      });

Incomplete information. You need provide all the relevant information to the question and bug. — Smit
– Smit, Commented Mar 6, 2017 at 5:58
Its not an array. your job is a string That is what error is trying to say. — Smit
– Smit, Commented Mar 6, 2017 at 5:59
If the error message says it's a string it probably is a string. — Thilo
– Thilo, Commented Mar 6, 2017 at 5:59
@harishmahajan You cant provide one by one information. It gets too dragy. Can you provide everything inorder for us to re-create the bug? — Smit
– Smit, Commented Mar 6, 2017 at 6:05
@harishmahajan var job=jobs['sentCarer'] how can you say job is an array. it might be a string also. — Jai
– Jai, Commented Mar 6, 2017 at 6:06

Smit · Accepted Answer · 2017-03-06 06:01:19Z

10

arrays: string[];
arrayString: string;

See the diff between? one is array and another is string.

arrays.forEach(...) // valid.
arrayString.forEach(...) //invalid.

answered Mar 6, 2017 at 6:01

Smit

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3 Comments

Smit Over a year ago

What is jobs ?

Harish Mahajan Over a year ago

it is an array variable. thanks. now i used public job:String; and works

Smit Over a year ago

Then what does ['sentCarer'] do?

Volodymyr Neborachko · Accepted Answer · 2021-12-15 17:21:12Z

1

The issue is that TypeScript is trying to save you from accidentially calling forEach on keys when it's a string type, as it could fail on runtime. You will need to make sure keys are type of array before calling foreach:

if (Array.isArray(job)) {
  job.forEach(...);
}

answered Dec 15, 2021 at 17:21

Volodymyr Neborachko

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