Rule: prefer-template

Prefer a template expression over string literal concatenation.

Config

If allow-single-concat is specified, then a single concatenation (x + y) is allowed, but not more (x + y + z).

Config examples

"prefer-template": true

"prefer-template": [true, "allow-single-concat"]

Schema

{
  "type": "string",
  "enum": [
    "allow-single-concat"
  ]
}

Code examples:

"rules": { "prefer-template": true }

const x: number = 1;
const y: number = 1;
const myString: string = `${x} is equals ${y}`;

const x: number = 1;
const y: number = 1;
const myString: string = x + ' is equals ' + y;

"rules": { "prefer-template": [true, "allow-single-concat"] }

const x: number = 1;
const y: number = 1;
const myString: string = x + ' is equals 1';
const myString: string = `${x} is equals ${y}`;

const x: number = 1;
const y: number = 1;
const myString: string = x + ' is equals ' + y;