How can I interpolate a JavaScript variable in string without using concatenation?

General Discussions
#1

How can I interpolate a JavaScript variable in string without using concatenation?

In PHP, you can do this easily, like $my_string = “I pity the $hello”;, but is there a similar way to use variables inside strings in JavaScript for a cleaner approach?

#2

Hi,

The most elegant and modern way to interpolate a javascript variable in string is by using template literals, which are enclosed in backticks (`). You can embed variables directly using ${}.

let hello = "foo";
let myString = `I pity the ${hello}`;
console.log(myString); // Output: "I pity the foo"

This approach is concise and makes your code more readable.

#3

You can also achieve javascript variable in string interpolation using replace() with a custom placeholder in the string.

let hello = "foo";
let myString = "I pity the {name}".replace("{name}", hello);
console.log(myString); // Output: "I pity the foo"

This method is useful if you want to reuse the same string format for multiple variables.

#4

Another approach is using a function that takes a JavaScript variable in string as input and returns the interpolated result.

function interpolateString(name) {
return `I pity the ${name}`;
}
let hello = "foo";
let myString = interpolateString(hello);
console.log(myString); // Output: "I pity the foo"

This solution provides flexibility by allowing you to define your own interpolation logic.