JavaScript Course
JavaScript
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Beginner

Template Literals

Definition

String literals allowing embedded expressions and multi-line strings, enclosed by the backtick (` `) character.

Explain Like I'm New

Instead of gluing strings together with clumsy plus signs (`'Hello ' + name + '!'`), Template Literals let you inject variables directly inside the string like a fill-in-the-blank mad-lib: `` `Hello ${name}!` ``.

Real World Example

Writing readable multi-line HTML strings or complex API endpoints: `` fetch(`https://api.com/users/${userId}/posts`) ``.

Common Use Cases

  • •String interpolation
  • •Multi-line strings
  • •Styled Components (Tagged Templates)

Interactive Example

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Interview Questions

basic

  • What character is used for Template Literals?

intermediate

  • Can you execute functions inside the `${}` syntax?

advanced

  • What is a Tagged Template Literal?

Flash Cards

Question

Can you execute functions inside ${}?

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Answer

Yes. You can put ANY valid JavaScript expression inside `${}`. This includes math `${2 + 2}`, function calls `${getName()}`, or ternaries `${isLoggedIn ? 'Yes' : 'No'}`.

Question

What is a Tagged Template?

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Answer

A tagged template allows you to parse a template literal with a custom function. This is exactly how the `styled-components` library in React works. Example: `styled.div` is actually a function, and the string ```color: red;``` is passed to it as arguments.