harmony 鸿蒙ArkCompiler Subsystem Changelog
ArkCompiler Subsystem Changelog
cl.arkcompiler.1 Behavior of JSON.parse in Invalid String Scenarios Changed
Access Level
Public API
Reason for Change
When JSON.parse is used to parse invalid strings, no JS exception is thrown. This symptom is different from the expectation and ECMA specifications.
Change Impact
This change is a non-compatible change.
const strData = `{"k1": "hello", "k2": 3}`;
const strErr = strData.substring(0, strData.length - 2); // `{"k1": "hello", "k2": `
JSON.parse(strErr);
Before change: JSON.parse can properly parse the invalid string strErr, and no JS exception is thrown.
After change: A JS exception is thrown when JSON.parse is used to parse the invalid string strErr.
Start API Level
12
Change Since
5.0 Beta3
Key API/Component Changes
JSON.parse/ASON.parse/util.json.parse
Adaptation Guide
When using JSON.parse, ensure that the input strings are valid or use try-catch to capture exceptions.
cl.arkcompiler.2 Behavior of JSON.parse in Underflow Floating Point Number or -0 Scenario Changed
Access Level
Public API
Reason for Change
When the string parsed by JSON.parse contains an underflow floating point number or -0, the API behavior does not comply with the specifications.
Change Impact
This change is a non-compatible change.
Before change:
The statement JSON.parse(‘123.456e-789’); returns -Infinity, which is an error result.
The statement 1/JSON.parse(‘-0’); returns Infinity, which is an error result.
After change:
The statement JSON.parse(‘123.456e-789’); returns 0, which is the correct result.
The statement 1/JSON.parse(‘-0’); returns -Infinity, which is the correct result.
Start API Level
12
Change Since
5.0 Beta3
Key API/Component Changes
JSON.parse/ASON.parse/util.json.parse
Adaptation Guide
Check 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.
cl.arkcompiler.3 Changes in TextEncoder.encodeInto()
Access Level
Public API
Reason for Change
When 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.
Change Impact
This change is a non-compatible change.
const arr = encoder.encodeInto('\0ab');
arr.length;
Before change: For arr = [0x00, 0x61, 0x62, 0x00], arr.length is 4.
After change: For arr = [0x00, 0x61, 0x62], arr.length is 3.
Start API Level
9
Change Since
5.0 Beta3
Key API/Component Changes
TextEncoder.encodeInto
Adaptation Guide
When encoding a string using TextEncoder.encodeInto, pay attention to the length of the returned array.
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