Prefer-template prohibit multi lines

What rule do you want to change?

Prefer-template

Does this change cause the rule to produce more or fewer warnings?

More

How will the change be implemented? (New option, new default behavior, etc.)?

New option.

Please provide some example code that this change will affect:

const assert = require('assert');
const foo = `multi
             line
             template
             strings
             are
             bad`;
assert(foo === 'multi line template strings are bad');

What does the rule currently do for this code?

It is happy.

What will the rule do after it’s changed?

It should report an error that using template strings that way is not a good idea.

[BridgeAR]

@LINKIWI that is why I suggested it as option and not as default.

[not-an-aardvark]

Thanks for your interest in improving ESLint. Unfortunately, it looks like this issue didn’t get consensus from the team, so I’m closing it. We define consensus as having three 👍s from team members, as well as a team member willing to champion the proposal. This is a high bar by design – we can’t realistically accept and maintain every feature request in the long term, so we only accept feature requests which are useful enough that there is consensus among the team that they’re worth adding.

Since ESLint is pluggable and can load custom rules at runtime, the lack of consensus among the ESLint team doesn’t need to be a blocker for you using this in your project, if you’d find it useful. It just means that you would need to implement the rule yourself, rather than using a bundled rule that is packaged with ESLint.