17 lines
185 B
JavaScript
17 lines
185 B
JavaScript
"use strict";
|
|
|
|
const obj = {
|
|
a: {
|
|
b: 0,
|
|
},
|
|
};
|
|
|
|
obj?.a.b = 1;
|
|
assert.equal(obj.a.b, 1);
|
|
|
|
obj?.a?.b = 2;
|
|
assert.equal(obj.a.b, 2);
|
|
|
|
obj?.b?.b = 3;
|
|
assert.equal(obj.b, undefined);
|