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@putout/plugin-apply-optional-chaining
Advanced tools
Readme
The optional chaining operator (
?.
) enables you to read the value of a property located deep within a chain of connected objects without having to check that each reference in the chain is valid.The
?.
operator is like the.
chaining operator, except that instead of causing an error if a reference is nullish (null
orundefined
), the expression short-circuits with a return value ofundefined
. When used with function calls, it returnsundefined
if the given function does not exist.This results in shorter and simpler expressions when accessing chained properties when the possibility exists that a reference may be missing. It can also be helpful while exploring the content of an object when there's no known guarantee as to which properties are required.
(c) MDN
🐊Putout plugin applies optional chaining. Backward to convert-optional-to-logical
.
npm i @putout/plugin-apply-optional-chaining
{
"rules": {
"apply-optional-chaining/use": "on",
"apply-optional-chaining/assign": "off"
}
}
Checkout out in 🐊Putout Editor.
const result = hello && hello.world;
if (typeof a === 'function' && a(1, 2))
alert();
const result = hello?.world;
if (a?.(1, 2))
alert();
Proposal to add support for optional chaining on the left of assignment operators:
a?.b = c
.
Disabled by default. Checkout out in 🐊Putout Editor.
if (a) {
a.b = 5;
}
if (a)
a.b = 5;
a && (a.b = 5);
a?.b = 5;
MIT
FAQs
🐊Putout plugin adds ability apply optional chaining
The npm package @putout/plugin-apply-optional-chaining receives a total of 15,937 weekly downloads. As such, @putout/plugin-apply-optional-chaining popularity was classified as popular.
We found that @putout/plugin-apply-optional-chaining demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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