What does 'void' in typescript mean?

Question

So I came across online, and I am wondering what does void imply in Typescript?

Just like here:

private _handleProjectQuerySuccess(data: IProject[]): void  
{
    data.sort(this._projectSort);

    var pathname = this._$location.path();

    var activeSet = false;
    data.forEach((project: IProject) =>
    {
        project.active = pathname == '/' + project.id;
        activeSet      = activeSet || project.active;

        project.name        = this._$sanitize(project.name);
        project.description = this._$sanitize(project.description);
        project.url         = this._$sce.trustAsUrl(project.url);
        project.readme      = this._$sce.trustAsHtml(project.readme);

        project.title = project.name + (project.fork ? ' (fork)' : ' (repo)');

        this._scope.projects.push(project);

        this._projectMap[project.id] = this._scope.projects[this._scope.projects.length - 1];
    });

    if (!activeSet)
    {
        data[0].active = true;
    }
}

After we declared private, we implied void... What does that mean?

Answer 1

This is just a type, as documented here:

Void

Perhaps the opposite in some ways to 'any' is 'void', the absence of having any type at all. You may commonly see this as the return type of functions that do not return a value:

function warnUser(): void {
    alert("This is my warning message");
}