Using Variables in Conditions in Vue.js: A Guide to String Concatenation

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The Problem Explained

Let's look at the scenario. You have a Vue component with the following data structure:

[[See Video to Reveal this Text or Code Snippet]]

Now, you want to display a message inside a <div> element:

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The intention is to output:

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However, the above code triggers an error. Why is this happening?

Understanding the Issue

Key Points to Note:

The ternary operator in JavaScript has the following format: condition ? trueExpression : falseExpression.

You cannot directly include {{name}} and {{lastName}} inside a string enclosed with single quotes.

The Solution: Correct Syntax

To resolve this issue, you need to incorporate template literals, allowing you to interpolate variables correctly. Here's how you can adjust your code:

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Breakdown of the Solution:

Template Literals: Use backticks (`) instead of single quotes. This allows you to embed variables directly in the string.

Interpolation: Use ${variableName} to include the values of your variables.

Final Output

With the corrected code, the output will now be:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion