1# ArkCompiler Subsystem Changelog
2
3## cl.arkcompiler.1 Behavior of JSON.parse in Invalid String Scenarios Changed
4
5**Access Level**
6
7Public API
8
9**Reason for Change**
10
11When **JSON.parse** is used to parse invalid strings, no JS exception is thrown. This symptom is different from the expectation and ECMA specifications.
12
13**Change Impact**
14
15This change is a non-compatible change.
16
17```
18const strData = `{"k1": "hello", "k2": 3}`;
19const strErr = strData.substring(0, strData.length - 2); // `{"k1": "hello", "k2": `
20JSON.parse(strErr);
21```
22
23Before change: **JSON.parse** can properly parse the invalid string **strErr**, and no JS exception is thrown.
24
25After change: A JS exception is thrown when **JSON.parse** is used to parse the invalid string **strErr**.
26
27**Start API Level**
28
2912
30
31**Change Since**
32
335.0 Beta3
34
35**Key API/Component Changes**
36
37JSON.parse/ASON.parse/util.json.parse
38
39**Adaptation Guide**
40
41When using **JSON.parse**, ensure that the input strings are valid or use **try-catch** to capture exceptions.
42
43## cl.arkcompiler.2 Behavior of JSON.parse in Underflow Floating Point Number or -0 Scenario Changed
44
45**Access Level**
46
47Public API
48
49**Reason for Change**
50
51When the string parsed by **JSON.parse** contains an underflow floating point number or **-0**, the API behavior does not comply with the specifications.
52
53**Change Impact**
54
55This change is a non-compatible change.
56
57Before change:
58
59The statement **JSON.parse('123.456e-789');** returns **-Infinity**, which is an error result.
60
61The statement **1/JSON.parse('-0');** returns **Infinity**, which is an error result.
62
63After change:
64
65The statement **JSON.parse('123.456e-789');** returns **0**, which is the correct result.
66
67The statement **1/JSON.parse('-0');** returns **-Infinity**, which is the correct result.
68
69**Start API Level**
70
7112
72
73**Change Since**
74
755.0 Beta3
76
77**Key API/Component Changes**
78
79JSON.parse/ASON.parse/util.json.parse
80
81**Adaptation Guide**
82
83Check whether an underflow floating-point number and **-0** is passed in to **JSON.parse**. If so, check whether the code logic can adapt to the correct value.
84
85## cl.arkcompiler.3 Changes in TextEncoder.encodeInto()
86
87**Access Level**
88
89Public API
90
91**Reason for Change**
92
93When **TextEncoder.encodeInto** is used to encode a string, the length of the returned array incorrectly increases by 2 each time the character '\0' is added to the string.
94
95**Change Impact**
96
97This change is a non-compatible change.
98
99```
100const arr = encoder.encodeInto('\0ab');
101arr.length;
102```
103
104Before change: For **arr = [0x00, 0x61, 0x62, 0x00]**, **arr.length** is 4.
105
106After change: For **arr = [0x00, 0x61, 0x62]**, **arr.length** is 3.
107
108**Start API Level**
109
1109
111
112**Change Since**
113
1145.0 Beta3
115
116**Key API/Component Changes**
117
118TextEncoder.encodeInto
119
120**Adaptation Guide**
121
122When encoding a string using **TextEncoder.encodeInto**, pay attention to the length of the returned array.
123