Discuss template strings/literals.

Q: Discuss template strings/literals.

console.log(`My name is ${myName} and I am a ${myRole}.`); With template literals, multi-line strings can be written as follows, console.log(`Welcome! My Name is ${myName} I am a ${myRole}`); //newline character unnecessary

Difficulty: 4/10

interpolation, tagged templates, multiline strings

Template strings (officially called Template Literals) are a modern way to handle strings in JavaScript, introduced in ES6. They offer a much cleaner syntax for string creation compared to traditional single (') or double (") quotes. Known as Template strings in the previous editions of ES2015, Template literals allow embedded expressions, multi-line strings and string interpolation.

javascript

Scenario Questions

0-2 years experience

1How would you use a template literal to build a URL string that includes a user‑provided ID?
2What will the following code output and why? const name = 'Alice'; console.log(`Hello ${name.toUpperCase()}`);

2-5 years experience

1We have a function that builds an SQL query using string concatenation and it’s failing when a value contains a newline. How would you refactor it with template literals, and what pitfalls should you watch out for?

Follow-up Questions

What edge cases did you consider when using interpolation?
How would you test that your tag function correctly sanitizes input?
Can you estimate the performance impact of using a tag function at scale?