1e41f4b71Sopenharmony_ci# ArkCompiler子系统Changelog 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci## cl.arkcompiler.1 JSON.parse解析非法字符串行为变更 4e41f4b71Sopenharmony_ci 5e41f4b71Sopenharmony_ci**访问级别** 6e41f4b71Sopenharmony_ci 7e41f4b71Sopenharmony_ci公开接口 8e41f4b71Sopenharmony_ci 9e41f4b71Sopenharmony_ci**变更原因** 10e41f4b71Sopenharmony_ci 11e41f4b71Sopenharmony_ciJSON.parse解析非法字符串未抛JS异常，表现与预期及ECMA规范不一致 12e41f4b71Sopenharmony_ci 13e41f4b71Sopenharmony_ci**变更影响** 14e41f4b71Sopenharmony_ci 15e41f4b71Sopenharmony_ci该变更为不兼容性变更。 16e41f4b71Sopenharmony_ci 17e41f4b71Sopenharmony_ci``` 18e41f4b71Sopenharmony_ciconst strData = `{"k1": "hello", "k2": 3}`; 19e41f4b71Sopenharmony_ciconst strErr = strData.substring(0, strData.length - 2); // `{"k1": "hello", "k2": ` 20e41f4b71Sopenharmony_ciJSON.parse(strErr); 21e41f4b71Sopenharmony_ci``` 22e41f4b71Sopenharmony_ci 23e41f4b71Sopenharmony_ci变更前：JSON.parse解析非法字符串`strErr`能够正常解析，未抛出JS异常。 24e41f4b71Sopenharmony_ci 25e41f4b71Sopenharmony_ci变更后：JSON.parse解析非法字符串`strErr`抛出JS异常。 26e41f4b71Sopenharmony_ci 27e41f4b71Sopenharmony_ci**起始API Level** 28e41f4b71Sopenharmony_ci 29e41f4b71Sopenharmony_ci12 30e41f4b71Sopenharmony_ci 31e41f4b71Sopenharmony_ci**变更发生版本** 32e41f4b71Sopenharmony_ci 33e41f4b71Sopenharmony_ci5.0 Beta3 34e41f4b71Sopenharmony_ci 35e41f4b71Sopenharmony_ci**变更的接口/组件** 36e41f4b71Sopenharmony_ci 37e41f4b71Sopenharmony_ciJSON.parse/ASON.parse/util.json.parse 38e41f4b71Sopenharmony_ci 39e41f4b71Sopenharmony_ci**适配指导** 40e41f4b71Sopenharmony_ci 41e41f4b71Sopenharmony_ci针对JSON.parse解析非法字符串的异常场景，开发者需要保证传入的字符串为合法字符串，或者使用try-catch捕获异常。 42e41f4b71Sopenharmony_ci 43e41f4b71Sopenharmony_ci## cl.arkcompiler.2 JSON.parse解析浮点数下溢或-0行为变更 44e41f4b71Sopenharmony_ci 45e41f4b71Sopenharmony_ci**访问级别** 46e41f4b71Sopenharmony_ci 47e41f4b71Sopenharmony_ci公开接口 48e41f4b71Sopenharmony_ci 49e41f4b71Sopenharmony_ci**变更原因** 50e41f4b71Sopenharmony_ci 51e41f4b71Sopenharmony_ciJSON.parse相关接口解析字符串含有浮点数下溢或-0的情况，表现与规范不一致。 52e41f4b71Sopenharmony_ci 53e41f4b71Sopenharmony_ci**变更影响** 54e41f4b71Sopenharmony_ci 55e41f4b71Sopenharmony_ci该变更为不兼容性变更。 56e41f4b71Sopenharmony_ci 57e41f4b71Sopenharmony_ci变更前： 58e41f4b71Sopenharmony_ci`JSON.parse('123.456e-789');` 返回 `-Infinity`，是错误结果。 59e41f4b71Sopenharmony_ci`1/JSON.parse('-0');` 返回 `Infinity`，是错误结果。 60e41f4b71Sopenharmony_ci 61e41f4b71Sopenharmony_ci变更后： 62e41f4b71Sopenharmony_ci`JSON.parse('123.456e-789');` 返回 `0`，是正确结果。 63e41f4b71Sopenharmony_ci`1/JSON.parse('-0');` 返回 `-Infinity`，是正确结果。 64e41f4b71Sopenharmony_ci 65e41f4b71Sopenharmony_ci**起始API Level** 66e41f4b71Sopenharmony_ci 67e41f4b71Sopenharmony_ci12 68e41f4b71Sopenharmony_ci 69e41f4b71Sopenharmony_ci**变更发生版本** 70e41f4b71Sopenharmony_ci 71e41f4b71Sopenharmony_ci5.0 Beta3 72e41f4b71Sopenharmony_ci 73e41f4b71Sopenharmony_ci**变更的接口/组件** 74e41f4b71Sopenharmony_ci 75e41f4b71Sopenharmony_ciJSON.parse/ASON.parse/util.json.parse 76e41f4b71Sopenharmony_ci 77e41f4b71Sopenharmony_ci**适配指导** 78e41f4b71Sopenharmony_ci 79e41f4b71Sopenharmony_ci对于开发者，排查代码中是否存在对JSON.parse相关接口传入下溢的浮点数字符串与-0的情况，如果存在该现象，则排查代码逻辑是否能适配正确的值。 80e41f4b71Sopenharmony_ci 81e41f4b71Sopenharmony_ci## cl.arkcompiler.3 TextEncoder.encodeInto()接口变更 82e41f4b71Sopenharmony_ci 83e41f4b71Sopenharmony_ci**访问级别** 84e41f4b71Sopenharmony_ci 85e41f4b71Sopenharmony_ci公开接口 86e41f4b71Sopenharmony_ci 87e41f4b71Sopenharmony_ci**变更原因** 88e41f4b71Sopenharmony_ci 89e41f4b71Sopenharmony_ciTextEncoder.encodeInto编码字符串，当字符串中每多一个'\0'字符，返回的数组长度会增加2，长度异常。 90e41f4b71Sopenharmony_ci 91e41f4b71Sopenharmony_ci**变更影响** 92e41f4b71Sopenharmony_ci 93e41f4b71Sopenharmony_ci该变更为不兼容性变更。 94e41f4b71Sopenharmony_ci 95e41f4b71Sopenharmony_ci``` 96e41f4b71Sopenharmony_ciconst arr = encoder.encodeInto('\0ab'); 97e41f4b71Sopenharmony_ciarr.length; 98e41f4b71Sopenharmony_ci``` 99e41f4b71Sopenharmony_ci 100e41f4b71Sopenharmony_ci变更前：arr = [0x00, 0x61, 0x62, 0x00], arr.length 为4 101e41f4b71Sopenharmony_ci 102e41f4b71Sopenharmony_ci变更后：arr = [0x00, 0x61, 0x62], arr.length 为3 103e41f4b71Sopenharmony_ci 104e41f4b71Sopenharmony_ci**起始API Level** 105e41f4b71Sopenharmony_ci 106e41f4b71Sopenharmony_ci9 107e41f4b71Sopenharmony_ci 108e41f4b71Sopenharmony_ci**变更发生版本** 109e41f4b71Sopenharmony_ci 110e41f4b71Sopenharmony_ci5.0 Beta3 111e41f4b71Sopenharmony_ci 112e41f4b71Sopenharmony_ci**变更的接口/组件** 113e41f4b71Sopenharmony_ci 114e41f4b71Sopenharmony_ciTextEncoder.encodeInto 115e41f4b71Sopenharmony_ci 116e41f4b71Sopenharmony_ci**适配指导** 117e41f4b71Sopenharmony_ci 118e41f4b71Sopenharmony_ci针对TextEncoder.encodeInto编码字符串时，注意返回的数组长度。