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Front-end frameworks, in general, are exploding in popularity, and Vue.js, in particular, has become one of the most popular ones.

As front-end frameworks continue to grow in usage, the ability to incorporate testing has become an essential feature. Ensuring the safety and security of your web applications is critical.

You can learn to test your Vue.js applications thoroughly using Jest with this interactive course.

You'll start by learning the simplest unit tests in Jest, and will gradually build up to more intricate tests of different Vue components. To give you practical front-end testing experience, you'll be running your tests on a predefined data rendering Vue.js application.

This course is essential for anyone looking to create robust and effective front-end tests for their Vue apps.

Testing Vue.js Components with Jest

## The `slots` Property of the `options` Object

Vue components have two instance variables useful for accessing slots:

>- **`$children`**: an array of Vue component instances of the default slot.
>
>- **`$slots`**: an object of VNodes mapping all the slots defined in the component instance.

The `$slots` object has more data available. In fact, `$children` is just a portion of the `$slots` variable that could be accessed the same way by mapping over the `$slots.default` array and filtering by Vue component instances:

# The `slots` Property of the `options` Object

Vue components have two instance variables useful for accessing slots:

>- **`$children`**: an array of Vue component instances of the default slot.
>
>- **`$slots`**: an object of VNodes mapping all the slots defined in the component instance.

The `$slots` object has more data available. In fact, `$children` is just a portion of the `$slots` variable that could be accessed the same way by mapping over the `$slots.default` array and filtering by Vue component instances:

# The `slots` Property of the `options` Object

Vue components have two instance variables useful for accessing slots:

>- **`＄children`**: an array of Vue component instances of the default slot.
>
>- **`＄slots`**: an object of VNodes mapping all the slots defined in the component instance.

The `＄slots` object has more data available. In fact, `＄children` is just a portion of the `＄slots` variable that could be accessed the same way by mapping over the `＄slots.default` array and filtering by Vue component instances:

In this lesson, we will learn about $children and $slots.

$children and $slots

The slots Property of the options Object

The `slots` Property of the `options` Object