Issue: "The argument provided must be a specific string, not a string or an array of strings."

Question

Issue: "The argument provided must be a specific string, not a string or an array of strings."

Currently, I am tackling a Vue project that incorporates TypeScript and axios for handling API requests. While working on the Reset Password component, the resetPassword function within the auth.ts file appears as follows:

resetPassword(password1: string, password2: string, uid: string, token: string): Promise<any> {
      
      return new Promise<any>((resolve, reject) => {
        axios
            .post("API", { password1, password2, uid, token })
            .then((res : any) => {
              resolve(//RESOLVE);
            })
            .catch((error) => {
              //REJECT
            })
      })
    }

Within my ResetPassword.vue file, I have utilized the newPassword variable in the following manner:

this.resetPassword(password1.value, password2.value, this.$route.params.id, this.$route.params.resetID).then(
      (res) => {
        if(password1.value == password2.value){
            Notification{
                "SUCCESS"
            });
          }

However, an error arises stating "Type 'string[]' is not assignable to type 'string'." when dealing with the 3rd parameter in the ResetPassword.vue file.

As I navigate through TypeScript, I require assistance. Should I proceed with this.$route.params.id as string or opt for this.$route.params.id.toString()?

typescript vue.js query-string

Answer 1

Answer №1

When working with route parameters, it is important to consider the possibility of multiple values with the same key. This can result in an array of strings instead of a single string. To ensure accurate typing, you can use as string to explicitly specify that a variable should be treated as a string rather than a string[].

this.resetPassword(password1.value, password2.value, this.$route.params.id as string, this.$route.params.resetID as string)

If you attempt to convert an array to a string using .toString(), such as with

["foo", "bar"]

, the result will be "foo,bar", combining all elements.

To handle uncertainty about whether a parameter is an array or not, you can check its type and retrieve the first value if necessary:

let id: string;
if (Array.isArray(this.$route.params.id)) {
    id = this.$route.params.id[0];
} else {
    id = this.$route.params.id;
}

Answer 2

When working with route parameters, it is important to consider the possibility of multiple values with the same key. This can result in an array of strings instead of a single string. To ensure accurate typing, you can use as string to explicitly specify that a variable should be treated as a string rather than a string[].

this.resetPassword(password1.value, password2.value, this.$route.params.id as string, this.$route.params.resetID as string)

If you attempt to convert an array to a string using .toString(), such as with

["foo", "bar"]

, the result will be "foo,bar", combining all elements.

To handle uncertainty about whether a parameter is an array or not, you can check its type and retrieve the first value if necessary:

let id: string;
if (Array.isArray(this.$route.params.id)) {
    id = this.$route.params.id[0];
} else {
    id = this.$route.params.id;
}

Issue: "The argument provided must be a specific string, not a string or an array of strings."

Answer №1

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