1// Copyright 2018 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5//go:build js && wasm
6
7package time
8
9import (
10	"internal/itoa"
11	"syscall/js"
12)
13
14var platformZoneSources = []string{
15	"/usr/share/zoneinfo/",
16	"/usr/share/lib/zoneinfo/",
17	"/usr/lib/locale/TZ/",
18}
19
20func initLocal() {
21	localLoc.name = "Local"
22
23	z := zone{}
24	d := js.Global().Get("Date").New()
25	offset := d.Call("getTimezoneOffset").Int() * -1
26	z.offset = offset * 60
27	// According to https://tc39.github.io/ecma262/#sec-timezoneestring,
28	// the timezone name from (new Date()).toTimeString() is an implementation-dependent
29	// result, and in Google Chrome, it gives the fully expanded name rather than
30	// the abbreviation.
31	// Hence, we construct the name from the offset.
32	z.name = "UTC"
33	if offset < 0 {
34		z.name += "-"
35		offset *= -1
36	} else {
37		z.name += "+"
38	}
39	z.name += itoa.Itoa(offset / 60)
40	min := offset % 60
41	if min != 0 {
42		z.name += ":" + itoa.Itoa(min)
43	}
44	localLoc.zone = []zone{z}
45}
46