Module js 

JavaScript string and number semantics that pi’s texts depend on: string lengths and slices count UTF-16 code units, and toFixed and Math.round round halves up.

Functions

byte_index

The byte offset of UTF-16 index units in text: the start of the first character at or after it, or the end of the text.

decode_utf8_stream

TextDecoder.decode(bytes, {stream: true}): appends bytes to pending and decodes what is complete. A character cut off at the end stays pending; invalid bytes become U+FFFD.

errno

Node’s code and description for an I/O error of kind, such as ("ENOENT", "no such file or directory").

len

text.length.

node_error

The message Node gives a failed file system call, such as ENOENT: no such file or directory, access '/a/b'.

round

Math.round(value).

slice

text.slice(start, end) with indices in UTF-16 code units, clamped to the text. A surrogate pair cut in half becomes U+FFFD.

to_fixed

value.toFixed(digits): the exact value rounded half up.

utf16_index

The UTF-16 index of byte offset byte in text, as JavaScript indexes strings; an offset inside a character counts from its start.