added showStep method to our chain in the task
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1 changed files with 3 additions and 1 deletions
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@ -28,12 +28,14 @@ ladder.up();
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ladder.up();
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ladder.down();
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ladder.showStep(); // 1
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ladder.down();
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ladder.showStep(); // 0
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```
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Modify the code of `up`, `down` and `showStep` to make the calls chainable, like this:
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```js
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ladder.up().up().down().showStep(); // 1
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ladder.up().up().down().showStep().down().showStep(); // shows 1 then 0
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```
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Such approach is widely used across JavaScript libraries.
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