Introduction

All comperation statements either in Apex or LWC return Boolean. Let's take a look for an examples.

LWC

'a' === 'b' // => false
1 === 1 // => true

Apex

'a' == 'b' // => false
1 == 1 // => true

Issue

There is no need to use the ternary operator since the comparison statement returns a Boolean.

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const isPartner = this.userType === 'Partner' ? true : false;

const isCustomer = this.userType === 'Partner' ? false : true;

Based on the documentation:

condition ? exprIfTrue : exprIfFalse;

You have something like this:

condition that evaluates to Boolean (condition) ? true (exprIfTrue) : false (exprIfFalse);

true (condition that evaluates to Boolean) ? true : false;

false (condition that evaluates to Boolean) ? true : false;

Best Practice

• this.userType === 'Partner' is comperation statement.
• A comparison statement inherently returns a Boolean value.
• Therefore, there is no need to use the Ternary operator, since the result is already true or false.

Based on the KISS principle your code can be as simple as possible.

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const isPartner = this.userType === 'Partner';

const isCustomer = this.userType !== 'Partner';

Do not use Ternary operator to return Boolean

If you have any questions feel free to ask in the comment section below. 🙂

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References

• KISS principle
• Ternary operator