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No está pasando mi código. No sé en que me estaré equivocando, dejo consigna y mi código para ver si me pueden ayudar.
Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable, but lowercased.
Strings have a `.toLowerCase()` method that can help you with this. Do not give your `span` any text yet.
output.innerHTML = `<span class="surplusOrDeficit.toLowerCase()"></span>`;
Challenge Information:
Learn Form Validation by Building a Calorie Counter - Step 79