Support optional chaining operator
See original GitHub issueGreat job here.
I want to suggest adding support for the optional chaining operator e.g
Code:
'use strict';
function greet(name) {
name = name || 'World'
var isJohn = name && name.includes && name.includes('John')
alert(isJohn ? 'Hello Admin' : 'Hello ' + name)
}
Current Output:
function greet(name = 'World') {
const isJohn = name && name.includes && name.includes('John')
alert(isJohn ? 'Hello Admin' : `Hello ${name}`)
}
Expected Output:
function greet(name = 'World') {
const isJohn = name?.includes('John')
alert(isJohn ? 'Hi Admin' : `Hello ${name}`)
}
Issue Analytics
- State:
- Created 3 years ago
- Comments:11 (4 by maintainers)
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@frank-dspeed thanks for clarifying, although I never said that a stage 3 proposals have a chance to not be implemented. In fact, I don’t think there has ever been a stage 3 proposal that was eventually withdrawn/rejected. You are also correct that browsers indeed are implementing most of the stage 3 proposals, however, Lebab does not rely on browsers as its parser. It uses Espree and during the time i wrote that comment,
optional chaining
was still not implemented.Going back, I would say this is now possible to do since Espree have already implemented it on their latest release v7.2.0 which includes PR #446 and was only released 6 days ago.
Optional chaining works in Node 14+, would be a great addition to lebab