Untracked

Untracked 允许你运行一段代码而不建立观察者。 类似 transaction，untracked 由 (@)action 自动应用，因此通常使用 actions 比直接使用 untracked 更有意义。 示例:

const person = observable({
    firstName: "Michel",
    lastName: "Weststrate"
});

autorun(() => {
    console.log(
        person.lastName,
        ",",
        // this untracked block will return the person's firstName without establishing a dependency
        untracked(() => person.firstName)
    );
});
// prints: Weststrate, Michel

person.firstName = "G.K.";
// doesn't print!

person.lastName = "Chesterton";
// prints: Chesterton, G.K.