What is the best way to change a reactive variable in Vue with TypeScript?

export default {
name: 'AuthCallback',
data() {
    return {
        accessToken: null,
    }
},
mounted() {
    const tokenParseRegex: RegExp = /access_token=(.*?)&/;
    const idParseRegex: RegExp = /user_id(.*?)/;
    const exAccessToken: RegExpMatchArray | null = useRoute().hash.match(tokenParseRegex);
    this.data().accessToken =  exAccessToken![1];
}

}

this.data().accessToken = exAccessToken![1] - What is causing the error "The type "string" cannot be assigned to the type "null"" on this line? Additionally, it seems that in the console, this.data is not recognized as a function.

Answer â„–1

Consider utilizing

this.accessToken = exAccessToken![1]

Rather than

this.data().accessToken = exAccessToken![1]

The issue arises because of the placement of "data()" after "this", causing it to be mistaken for a function.

When accessing data, simply use this.nameOfVar

Answer â„–2

If you want to experiment, try expanding your data object by specifying a type for it.

data() : { token: null | string }
{
    return {
        token: null,
    }
}

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