1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
//// [crashInGetTextOfComputedPropertyName.ts]
// https://github.com/Microsoft/TypeScript/issues/29006
export interface A { type: 'a' }
export interface B { type: 'b' }
export type AB = A | B
const itemId = 'some-id'
// --- test on first level ---
const items: { [id: string]: AB } = {}
const { [itemId]: itemOk1 } = items
typeof itemOk1 // pass
// --- test on second level ---
interface ObjWithItems {
items: {[s: string]: AB}
}
const objWithItems: ObjWithItems = { items: {}}
const itemOk2 = objWithItems.items[itemId]
typeof itemOk2 // pass
const {
items: { [itemId]: itemWithTSError } = {} /*happens when default value is provided*/
} = objWithItems
// in order to re-produce the error, uncomment next line:
typeof itemWithTSError // :(
// will result in:
// Error from compilation: TypeError: Cannot read property 'charCodeAt' of undefined TypeError: Cannot read property 'charCodeAt' of undefined
//// [crashInGetTextOfComputedPropertyName.js]
"use strict";
exports.__esModule = true;
var itemId = 'some-id';
// --- test on first level ---
var items = {};
var _a = items, _b = itemId, itemOk1 = _a[_b];
typeof itemOk1; // pass
var objWithItems = { items: {} };
var itemOk2 = objWithItems.items[itemId];
typeof itemOk2; // pass
var _c = objWithItems, _d = _c.items /*happens when default value is provided*/, _e = _d === void 0 ? {} : _d /*happens when default value is provided*/, _f = itemId, itemWithTSError = _e[_f];
// in order to re-produce the error, uncomment next line:
typeof itemWithTSError; // :(
// will result in:
// Error from compilation: TypeError: Cannot read property 'charCodeAt' of undefined TypeError: Cannot read property 'charCodeAt' of undefined
|
