Typescript throws an error indicating that the "this" object in Vue methods may be undefined, displaying error code TS2532

As a beginner in question writing, I apologize if my wording is not clear.

The issue at hand: I am working on a Vue application with TypeScript.

export default {
    methods: {
        setProgram: (program: Program)=>{
            this.program = program // TS2532: Object is possibly 'undefined'.
            this.step++ // TS2532: Object is possibly 'undefined'.
        }
    },
    ...
}

While I appreciate the safety net provided by TypeScript, I am confident that "this" will not be undefined in this scenario.

How can I reassure TypeScript about using "this" in this context?

I appreciate any help, have a wonderful day!

Sincerely, Dom.

javascripttypescriptvue.jsvuejs3

Answer №1

Understood!

"this" could potentially be undefined when utilized within a lambda function :)

Slight modification required

setProgram: (program: Program) => {

replace it with:

setProgram: function (program: Program) {

and it will work like a charm ...

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