Metamask: View: Root Error: Invalid character in NaN / View: Root TypeError: undefined is not an object (evaluating ‘o.negative’)
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Title:
Metamask integration problem: root errors and typeerror
Entry
As a React programmer, you probably encountered problems during the integration of the Metamask portfolio with the internet application. In this article, we will examine two specific errors that may occur when using Metamask – “View: root error: an incorrect sign in NAN” and “Root Typeerror: undefined is not an object (assessment of” o.negative “)”. We will break down every mistake and provide tips on how to solve it.
Error 1: View: root error: incorrect sign in nan
The first error that we will solve is related to the API Web3 interface Metamask’s portfolio. Using a metamask, you usually convey the token object as an argument for the “getaccount” method. However, if the token object contains incorrect signs (e.g. signs other than ASCII or Unicode), the “nanvalue (not number) will be returned.
To solve this problem, make sure your token object is properly formatted and does not contain any incorrect characters. You can verify this by checking the documentation of the API Web3 Metamask Portfer for specific requirements for formatting token.
Solution
- Review your token to make sure it is consistent with the expected format.
- If necessary, modify the code to support incorrect characters in the creation of a new token object.
Error 2: Root Typeerror: undefined is not an object ("Vegetation")
The second error occurs when trying to access properties with a value without an object. In this case, "O.Negative" is probably the result of the call "Getaccount ()" with a token object containing incorrect signs.
To solve this problem, you need to modify the code to properly support the "nan value returned by the API Web3 Pallet Metamask interface. One way is to check whether the property of the “account” is an “nan” instance before trying to access its properties.
Solution
- Modify the code to check the existence and type of “account” properties:
`Jsx
Const reccon = wait for window.etheum.getaccount ();
if (! Account || Typeof account! == "object") {
Throw a new error ("incorrect connection of the metamask portfolio");
}
By adding this control, you can prevent access to properties in value without an object and solve Typeerror.
Application
To sum up, both mistakes can occur during integration Metamask with the React online application. Understanding the basic causes of these problems and implementing appropriate controls of incorrect data, you should be able to solve them and continue building solid and reliable applications using Metamask. If you experience persistent problems or need further help, contact our support team.
Note: This article is a general guide, and specific details of the implementation may vary depending on the use and the Metamask version you use. It is always recommended to consult with the official metamask documentation and programmers’ resources to get more information on problem solving and solving errors in the application.
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