#prefer-template

#Configuration

import { defineConfig, js } from '@rslint/core';

export default defineConfig([
  js.configs.recommended,
  {
    rules: {
      'prefer-template': 'error',
    },
  },
]);

#Rule Details

This rule is aimed to flag usage of + operators with strings. It encourages the use of template literals instead of string concatenation.

Examples of incorrect code for this rule:

var str = 'Hello, ' + name + '!';
var str = 'Time: ' + 12 * 60 * 60 * 1000;

Examples of correct code for this rule:

var str = 'Hello World!';
var str = `Hello, ${name}!`;
var str = `Time: ${12 * 60 * 60 * 1000}`;

This rule does not report two string literals concatenated together (for example, "Hello, " + "World!"), which is reported by the no-useless-concat rule instead.

The rule provides an autofix that rewrites the concatenation as a single template literal, preserving comments around the + operators. Autofix is skipped when any operand contains an octal or non-octal-decimal escape sequence, because those cannot be represented in a template literal.

#Original Documentation

• ESLint rule: prefer-template