How Can I Avoid String Concatenation When Interpolating Variables in JavaScript?

Interpolating Variables in Strings in JavaScript: A Concatenation-Free Approach

In PHP, variables within strings can be inserted seamlessly without concatenation. This raises the question of whether a similar approach is feasible in JavaScript.

JavaScript introduces Template Literals (ES2015), an elegant solution to insert expressions inside strings. These literals allow you to use backticks ( ) as string delimiters instead of double or single quotes.

Within template literals, expressions are interpolated using the syntax:

`String text ${expression}`

For instance:

var a = 5;
var b = 10;
console.log(`Fifteen is ${a + b}.`); // "Fifteen is 15."

This syntax not only enhances readability but also allows multi-line strings without escaping:

return `
    <div>

Browser support for this syntax is excellent, however, for older browsers like IE8 , Babel/Webpack can transpile code into ES5 for wider compatibility.

As a side note, basic string formatting can be achieved in console.log in IE8 :

console.log('%s is %d.', 'Fifteen', 15); // Fifteen is 15.

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