Learn JS #15

JavaScript Template Literals

Synonyms:

  • Template Literals
  • Template Strings
  • String Templates
  • Back-Tics Syntax

Back-Tics Syntax

Template Literals use back-ticks (“) rather than the quotes (“”) to define a string:

Example

let text = `Hello World!`;

Quotes Inside Strings

With template literals, you can use both single and double quotes inside a string:

Example

let text = `He's often called "Johnny"`;

Multiline Strings

Template literals allows multiline strings:

Example

let text =
`The quick
brown fox
jumps over
the lazy dog`;

Interpolation

Template literals provide an easy way to interpolate variables and expressions into strings.

The method is called string interpolation.

The syntax is:

${...}

Variable Substitutions

Template literals allow variables in strings:

Example

let firstName = "John";
let lastName = "Doe";

let text = `Welcome ${firstName}, ${lastName}!`;

Automatic replacing of variables with real values is called string interpolation.


Expression Substitution

Template literals allow expressions in strings:

Example

let price = 10;
let VAT = 0.25;

let total = `Total: ${(price * (1 + VAT)).toFixed(2)}`;

Automatic replacing of expressions with real values is called string interpolation.


HTML Templates

Example

let header = "Templates Literals";
let tags = ["template literals""javascript""es6"];

let html = `<h2>${header}</h2><ul>`;
for (const x of tags) {
  html += `<li>${x}</li>`;
}

html += `</ul>`;

 

42 thoughts on “Learn JS #15

Leave a Reply

Your email address will not be published. Required fields are marked *