Ignore Typescript Errors property does not exist on value of type

Question

In VS2013 building stops when tsc exits with code 1  This was not the case in VS2012   How can I run my solution while ignoring the tsc exe error   I get many The property  x  does not exist on value of type  y  errors  which I want to ignore when using javascript functions

User · Accepted Answer

I know the question is already closed but I've found it searching for same TypeScriptException, maybe some one else hit this question searching for this problem.

The problem lays in missing TypeScript typing:

var coordinates = outerElement[0].getBBox();

Throws The property 'getBBox' does not exist on value of type 'HTMLElement'.

The easiest way is to explicitly type variable as `any`

var outerHtmlElement: any = outerElement[0];
var coordinates = outerHtmlElement.getBBox();

Edit, late 2016

Since TypeScript 1.6, the prefered casting operator is as, so those lines can be squashed into:

let coordinates = (outerElement[0] as any).getBBox();

Other solutions

Of course if you'd like to do it right, which is an overkill sometimes, you can:

Create own interface which simply extends HTMLElement
Introduce own typing which extends HTMLElement

User · Answer

I know it s now 2020  but I couldn t see an answer that satisfied the  ignore  part of the question  Turns out  you can tell TSLint to do just that using a directive       ts-ignore this x   this x filter x   gt  x someProp     false     Normally this would throw an error  stating that  someProp does not exist on type   With the comment  that error goes away   This will stop any errors being thrown when compiling and should also stop your IDE complaining at you

User · Answer

The quick and dirty solution is to explicitly cast to any   y as any  x   The  advantage  is that  the cast being explicit  this will compile even with the noImplicitAny flag set   The proper solution is to update the typings definition file   Please note that  when you cast a variable to any  you opt out of type checking for that variable     Since I am in disclaimer mode  double casting via any combined with a new interface  can be useful in situations where you   do not want to update a broken typings file are monkey patching    yet  you still want some form of typing   Say you want to patch the definition of an instance of y of type OrginalDef with a new property x of type number   const y  OriginalDef        interface DefWithNewProperties extends OriginalDef       x  number    const patched   y as any as DefWithNewProperties  patched x            will compile

User · Answer

A quick fix where nothing else works   const a b   5    error  const a  b     5    error if ts-lint rule no-string-literal is enabled  const B    b  const a B    5    always works   Not good practice but provides a solution without needing to turn off no-string-literal

User · Answer

You can also use the following trick   y x    some custom property   gives typescript error  y  x      some custom property   no errors  Note  that to access x and dont get a typescript error again you need to write it like that y  x    not y x  So from this perspective the other options are better

User · Answer

I was able to get past this in typescript using something like   let x       data inside array    let y   new Map lt any  any gt     for  var i 0  i lt x length  i          y set x i     value for this key here       This seemed to be the only way that I could use the values inside X as keys for the map Y and compile

User · Answer

There are several ways to handle this problem  If this object is related to some external library  the best solution would be to find the actual definitions file  great repository here  for that library and reference it  e g         lt reference path   path to jquery d ts   gt    Of course  this doesn t apply in many cases   If you want to  override  the type system  try the following     declare var y    This will let you make any calls you want on var y

User · Answer

In my particular project I couldn t get it to work  and used declare var     Not a clean recommended solution  it doesnt recognise the JQuery variables  but I had no errors after using that  and had to for my automatic builds to succeed

User · Answer

Had a problem in Angular2  I was using the local storage to save something and it would not let me   Solutions     I had localStorage city  - gt  error - gt   Property  city  does not exist on type  Storage    How to fix it       localStorage  city         localStorage  city       localStorage as any  city

User · Answer

When TypeScript thinks that property  x  does not exist on  y   then you can always cast  y  into  any   which will allow you to call anything  like  x   on  y    Theory    lt any gt y  x    Real World Example  I was getting the error  TS2339  Property  name  does not exist on type  Function   for this code   let name  string   this constructor name    So I fixed it with   let name  string     lt any gt this  constructor name

[javascript] Ignore Typescript Errors "property does not exist on value of type"

Edit, late 2016

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