proposal-object-literal-coalescing-assignment
A proposal to introduce new assignment forms for ECMAScript object literals
MIT License
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JavaScript
proposal-object-literal-coalescing-assignment
A proposal to introduce new assignment forms for ECMAScript object literals
const obj = {
a: undefined,
b?: undefined
}
Object.hasOwn(obj, 'a') // true
Object.hasOwn(obj, 'b') // false
Variations
Explicit string key
const obj = {
'a' : undefined,
'b' ?: undefined
// ^
// \___ Parsing the `?:` token
}
Object.hasOwn(obj, 'a') // true
Object.hasOwn(obj, 'b') // false
Variable key alias
// Explicit string key
const a = undefined, b = undefined
const obj = {
a,
b?
// ^
// \___ Parsing the `?` token
}
Object.hasOwn(obj, 'a') // true
Object.hasOwn(obj, 'b') // false