Introduce GiteaLocaleNumber custom element to handle number localization on pages. (#23861)

Follow #21429 & #22861

Use `<gitea-locale-number>` instead of backend `PrettyNumber`. All old
`PrettyNumber` related functions are removed. A lot of code could be
simplified.

And some functions haven't been used for long time (dead code), so they
are also removed by the way (eg: `SplitStringAtRuneN`, `Dedent`)

This PR only tries to improve the `PrettyNumber` rendering problem, it
doesn't touch the "plural" problem.

Screenshot:


![image](https://user-images.githubusercontent.com/2114189/229290804-1f63db65-1e34-4a54-84ba-e00b44331b17.png)


![image](https://user-images.githubusercontent.com/2114189/229290911-c88dea00-b11d-48dd-accb-9f52edd73ce4.png)

24 files changed, 94 insertions, 227 deletions

diff --git a/modules/base/tool.go b/modules/base/tool.go
index 94f19576b4..bd3a8458ee 100644
--- a/modules/base/tool.go
+++ b/modules/base/tool.go
@@ -22,7 +22,6 @@ import (
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
-	"code.gitea.io/gitea/modules/util"
 
 	"github.com/dustin/go-humanize"
 	"github.com/minio/sha256-simd"
@@ -142,12 +141,6 @@ func FileSize(s int64) string {
 	return humanize.IBytes(uint64(s))
 }
 
-// PrettyNumber produces a string form of the given number in base 10 with
-// commas after every three orders of magnitude
-func PrettyNumber(i interface{}) string {
-	return humanize.Comma(util.NumberIntoInt64(i))
-}
-
 // Subtract deals with subtraction of all types of number.
 func Subtract(left, right interface{}) interface{} {
 	var rleft, rright int64
diff --git a/modules/base/tool_test.go b/modules/base/tool_test.go
index 81f4b464e6..33677a910c 100644
--- a/modules/base/tool_test.go
+++ b/modules/base/tool_test.go
@@ -114,13 +114,6 @@ func TestFileSize(t *testing.T) {
 	assert.Equal(t, "2.0 EiB", FileSize(size))
 }
 
-func TestPrettyNumber(t *testing.T) {
-	assert.Equal(t, "23,342,432", PrettyNumber(23342432))
-	assert.Equal(t, "23,342,432", PrettyNumber(int32(23342432)))
-	assert.Equal(t, "0", PrettyNumber(0))
-	assert.Equal(t, "-100,000", PrettyNumber(-100000))
-}
-
 func TestSubtract(t *testing.T) {
 	toFloat64 := func(n interface{}) float64 {
 		switch v := n.(type) {
diff --git a/modules/templates/helper.go b/modules/templates/helper.go
index a8343428dc..54c85863bd 100644
--- a/modules/templates/helper.go
+++ b/modules/templates/helper.go
@@ -19,7 +19,6 @@ import (
 	"reflect"
 	"regexp"
 	"runtime"
-	"strconv"
 	"strings"
 	texttmpl "text/template"
 	"time"
@@ -112,18 +111,17 @@ func NewFuncMap() []template.FuncMap {
 		"IsShowFullName": func() bool {
 			return setting.UI.DefaultShowFullName
 		},
-		"Safe":           Safe,
-		"SafeJS":         SafeJS,
-		"JSEscape":       JSEscape,
-		"Str2html":       Str2html,
-		"TimeSince":      timeutil.TimeSince,
-		"TimeSinceUnix":  timeutil.TimeSinceUnix,
-		"FileSize":       base.FileSize,
-		"PrettyNumber":   base.PrettyNumber,
-		"JsPrettyNumber": JsPrettyNumber,
-		"Subtract":       base.Subtract,
-		"EntryIcon":      base.EntryIcon,
-		"MigrationIcon":  MigrationIcon,
+		"Safe":          Safe,
+		"SafeJS":        SafeJS,
+		"JSEscape":      JSEscape,
+		"Str2html":      Str2html,
+		"TimeSince":     timeutil.TimeSince,
+		"TimeSinceUnix": timeutil.TimeSinceUnix,
+		"FileSize":      base.FileSize,
+		"LocaleNumber":  LocaleNumber,
+		"Subtract":      base.Subtract,
+		"EntryIcon":     base.EntryIcon,
+		"MigrationIcon": MigrationIcon,
 		"Add": func(a ...int) int {
 			sum := 0
 			for _, val := range a {
@@ -410,62 +408,9 @@ func NewFuncMap() []template.FuncMap {
 		"Join":        strings.Join,
 		"QueryEscape": url.QueryEscape,
 		"DotEscape":   DotEscape,
-		"Iterate": func(arg interface{}) (items []uint64) {
-			count := uint64(0)
-			switch val := arg.(type) {
-			case uint64:
-				count = val
-			case *uint64:
-				count = *val
-			case int64:
-				if val < 0 {
-					val = 0
-				}
-				count = uint64(val)
-			case *int64:
-				if *val < 0 {
-					*val = 0
-				}
-				count = uint64(*val)
-			case int:
-				if val < 0 {
-					val = 0
-				}
-				count = uint64(val)
-			case *int:
-				if *val < 0 {
-					*val = 0
-				}
-				count = uint64(*val)
-			case uint:
-				count = uint64(val)
-			case *uint:
-				count = uint64(*val)
-			case int32:
-				if val < 0 {
-					val = 0
-				}
-				count = uint64(val)
-			case *int32:
-				if *val < 0 {
-					*val = 0
-				}
-				count = uint64(*val)
-			case uint32:
-				count = uint64(val)
-			case *uint32:
-				count = uint64(*val)
-			case string:
-				cnt, _ := strconv.ParseInt(val, 10, 64)
-				if cnt < 0 {
-					cnt = 0
-				}
-				count = uint64(cnt)
-			}
-			if count <= 0 {
-				return items
-			}
-			for i := uint64(0); i < count; i++ {
+		"Iterate": func(arg interface{}) (items []int64) {
+			count := util.ToInt64(arg)
+			for i := int64(0); i < count; i++ {
 				items = append(items, i)
 			}
 			return items
@@ -1067,10 +1012,8 @@ func mirrorRemoteAddress(ctx context.Context, m *repo_model.Repository, remoteNa
 	return a
 }
 
-// JsPrettyNumber renders a number using english decimal separators, e.g. 1,200 and subsequent
-// JS will replace the number with locale-specific separators, based on the user's selected language
-func JsPrettyNumber(i interface{}) template.HTML {
-	num := util.NumberIntoInt64(i)
-
-	return template.HTML(`<span class="js-pretty-number" data-value="` + strconv.FormatInt(num, 10) + `">` + base.PrettyNumber(num) + `</span>`)
+// LocaleNumber renders a number with a Custom Element, browser will render it with a locale number
+func LocaleNumber(v interface{}) template.HTML {
+	num := util.ToInt64(v)
+	return template.HTML(fmt.Sprintf(`<gitea-locale-number data-number="%d">%d</gitea-locale-number>`, num, num))
 }
diff --git a/modules/util/truncate.go b/modules/util/truncate.go
index 032a6c0872..f41d27d8b7 100644
--- a/modules/util/truncate.go
+++ b/modules/util/truncate.go
@@ -35,27 +35,3 @@ func SplitStringAtByteN(input string, n int) (left, right string) {
 
 	return input[:end] + utf8Ellipsis, utf8Ellipsis + input[end:]
 }
-
-// SplitStringAtRuneN splits a string at rune n accounting for rune boundaries. (Combining characters are not accounted for.)
-func SplitStringAtRuneN(input string, n int) (left, right string) {
-	if !utf8.ValidString(input) {
-		if len(input) <= n || n-3 < 0 {
-			return input, ""
-		}
-		return input[:n-3] + asciiEllipsis, asciiEllipsis + input[n-3:]
-	}
-
-	if utf8.RuneCountInString(input) <= n {
-		return input, ""
-	}
-
-	count := 0
-	end := 0
-	for count < n-1 {
-		_, size := utf8.DecodeRuneInString(input[end:])
-		end += size
-		count++
-	}
-
-	return input[:end] + utf8Ellipsis, utf8Ellipsis + input[end:]
-}
diff --git a/modules/util/truncate_test.go b/modules/util/truncate_test.go
index 912bfb3d5f..05e2bc0301 100644
--- a/modules/util/truncate_test.go
+++ b/modules/util/truncate_test.go
@@ -43,18 +43,4 @@ func TestSplitString(t *testing.T) {
 		{"\xef\x03", 1, "\xef\x03", ""},
 	}
 	test(tc, SplitStringAtByteN)
-
-	tc = []*testCase{
-		{"abc123xyz", 0, "", utf8Ellipsis},
-		{"abc123xyz", 1, "", utf8Ellipsis},
-		{"abc123xyz", 4, "abc", utf8Ellipsis},
-		{"啊bc123xyz", 4, "啊bc", utf8Ellipsis},
-		{"啊bc123xyz", 6, "啊bc12", utf8Ellipsis},
-		{"啊bc", 3, "啊bc", ""},
-		{"啊bc", 4, "啊bc", ""},
-		{"abc\xef\x03\xfe", 3, "", asciiEllipsis},
-		{"abc\xef\x03\xfe", 4, "a", asciiEllipsis},
-		{"\xef\x03", 1, "\xef\x03", ""},
-	}
-	test(tc, SplitStringAtRuneN)
 }
diff --git a/modules/util/util.go b/modules/util/util.go
index 9d3a8dcfac..9c7097ad34 100644
--- a/modules/util/util.go
+++ b/modules/util/util.go
@@ -7,8 +7,9 @@ import (
 	"bytes"
 	"crypto/rand"
 	"errors"
+	"fmt"
 	"math/big"
-	"regexp"
+	"os"
 	"strconv"
 	"strings"
 
@@ -200,40 +201,14 @@ func ToTitleCaseNoLower(s string) string {
 	return titleCaserNoLower.String(s)
 }
 
-var (
-	whitespaceOnly    = regexp.MustCompile("(?m)^[ \t]+$")
-	leadingWhitespace = regexp.MustCompile("(?m)(^[ \t]*)(?:[^ \t\n])")
-)
-
-// Dedent removes common indentation of a multi-line string along with whitespace around it
-// Based on https://github.com/lithammer/dedent
-func Dedent(s string) string {
-	var margin string
-
-	s = whitespaceOnly.ReplaceAllString(s, "")
-	indents := leadingWhitespace.FindAllStringSubmatch(s, -1)
-
-	for i, indent := range indents {
-		if i == 0 {
-			margin = indent[1]
-		} else if strings.HasPrefix(indent[1], margin) {
-			continue
-		} else if strings.HasPrefix(margin, indent[1]) {
-			margin = indent[1]
-		} else {
-			margin = ""
-			break
-		}
-	}
-
-	if margin != "" {
-		s = regexp.MustCompile("(?m)^"+margin).ReplaceAllString(s, "")
-	}
-	return strings.TrimSpace(s)
+func logError(msg string, args ...any) {
+	// TODO: the "util" package can not import the "modules/log" package, so we use the "fmt" package here temporarily.
+	// In the future, we should decouple the dependency between them.
+	_, _ = fmt.Fprintf(os.Stderr, msg, args...)
 }
 
-// NumberIntoInt64 transform a given int into int64.
-func NumberIntoInt64(number interface{}) int64 {
+// ToInt64 transform a given int into int64.
+func ToInt64(number interface{}) int64 {
 	var value int64
 	switch v := number.(type) {
 	case int:
@@ -246,6 +221,23 @@ func NumberIntoInt64(number interface{}) int64 {
 		value = int64(v)
 	case int64:
 		value = v
+	case uint:
+		value = int64(v)
+	case uint8:
+		value = int64(v)
+	case uint16:
+		value = int64(v)
+	case uint32:
+		value = int64(v)
+	case uint64:
+		value = int64(v)
+	case string:
+		var err error
+		if value, err = strconv.ParseInt(v, 10, 64); err != nil {
+			logError("strconv.ParseInt failed for %q: %v", v, err)
+		}
+	default:
+		logError("unable to convert %q to int64", v)
 	}
 	return value
 }
diff --git a/modules/util/util_test.go b/modules/util/util_test.go
index 34fe070d22..8cceafa2f6 100644
--- a/modules/util/util_test.go
+++ b/modules/util/util_test.go
@@ -224,10 +224,3 @@ func TestToTitleCase(t *testing.T) {
 	assert.Equal(t, ToTitleCase(`foo bar baz`), `Foo Bar Baz`)
 	assert.Equal(t, ToTitleCase(`FOO BAR BAZ`), `Foo Bar Baz`)
 }
-
-func TestDedent(t *testing.T) {
-	assert.Equal(t, Dedent(`
-		foo
-			bar
-	`), "foo\n\tbar")
-}
diff --git a/templates/projects/list.tmpl b/templates/projects/list.tmpl
index 5062109161..73ae5ab6e4 100644
--- a/templates/projects/list.tmpl
+++ b/templates/projects/list.tmpl
@@ -13,11 +13,11 @@
 		<div class="ui compact tiny menu">
 			<a class="item{{if not .IsShowClosed}} active{{end}}" href="{{$.Link}}?state=open">
 				{{svg "octicon-project-symlink" 16 "gt-mr-3"}}
-				{{JsPrettyNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+				{{LocaleNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 			</a>
 			<a class="item{{if .IsShowClosed}} active{{end}}" href="{{$.Link}}?state=closed">
 				{{svg "octicon-check" 16 "gt-mr-3"}}
-				{{JsPrettyNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+				{{LocaleNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 			</a>
 		</div>
 
@@ -46,9 +46,9 @@
 						{{end}}
 						<span class="issue-stats">
 							{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
-							{{JsPrettyNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
+							{{LocaleNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
 							{{svg "octicon-check" 16 "gt-mr-3"}}
-							{{JsPrettyNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
+							{{LocaleNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
 						</span>
 					</div>
 					{{if and $.CanWriteProjects (not $.Repository.IsArchived)}}
diff --git a/templates/repo/issue/milestones.tmpl b/templates/repo/issue/milestones.tmpl
index 0a113e2484..0336d35c17 100644
--- a/templates/repo/issue/milestones.tmpl
+++ b/templates/repo/issue/milestones.tmpl
@@ -18,11 +18,11 @@
 				<div class="ui compact tiny menu">
 					<a class="item{{if not .IsShowClosed}} active{{end}}" href="{{.RepoLink}}/milestones?state=open&q={{$.Keyword}}">
 						{{svg "octicon-milestone" 16 "gt-mr-3"}}
-						{{JsPrettyNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+						{{LocaleNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 					</a>
 					<a class="item{{if .IsShowClosed}} active{{end}}" href="{{.RepoLink}}/milestones?state=closed&q={{$.Keyword}}">
 						{{svg "octicon-check" 16 "gt-mr-3"}}
-						{{JsPrettyNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+						{{LocaleNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 					</a>
 				</div>
 			</div>
@@ -84,9 +84,9 @@
 						{{end}}
 						<span class="issue-stats">
 							{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
-							{{JsPrettyNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
+							{{LocaleNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
 							{{svg "octicon-check" 16 "gt-mr-3"}}
-							{{JsPrettyNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
+							{{LocaleNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
 							{{if .TotalTrackedTime}}{{svg "octicon-clock"}} {{.TotalTrackedTime|Sec2Time}}{{end}}
 							{{if .UpdatedUnix}}{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.update_ago" (.TimeSinceUpdate|Sec2Time)}}{{end}}
 						</span>
diff --git a/templates/repo/issue/openclose.tmpl b/templates/repo/issue/openclose.tmpl
index e2c13fea18..6eb26b36c5 100644
--- a/templates/repo/issue/openclose.tmpl
+++ b/templates/repo/issue/openclose.tmpl
@@ -5,10 +5,10 @@
 		{{else}}
 			{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
 		{{end}}
-		{{JsPrettyNumber .IssueStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+		{{LocaleNumber .IssueStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 	</a>
 	<a class="{{if .IsShowClosed}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{.ViewType}}&sort={{$.SortType}}&state=closed&labels={{.SelectLabels}}&milestone={{.MilestoneID}}&project={{.ProjectID}}&assignee={{.AssigneeID}}&poster={{.PosterID}}">
 		{{svg "octicon-check" 16 "gt-mr-3"}}
-		{{JsPrettyNumber .IssueStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+		{{LocaleNumber .IssueStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 	</a>
 </div>
diff --git a/templates/repo/projects/list.tmpl b/templates/repo/projects/list.tmpl
index 2350a3af54..227a272705 100644
--- a/templates/repo/projects/list.tmpl
+++ b/templates/repo/projects/list.tmpl
@@ -15,11 +15,11 @@
 		<div class="ui compact tiny menu">
 			<a class="item{{if not .IsShowClosed}} active{{end}}" href="{{.RepoLink}}/projects?state=open">
 				{{svg "octicon-project" 16 "gt-mr-3"}}
-				{{JsPrettyNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+				{{LocaleNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 			</a>
 			<a class="item{{if .IsShowClosed}} active{{end}}" href="{{.RepoLink}}/projects?state=closed">
 				{{svg "octicon-check" 16 "gt-mr-3"}}
-				{{JsPrettyNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+				{{LocaleNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 			</a>
 		</div>
 
@@ -48,9 +48,9 @@
 						{{end}}
 						<span class="issue-stats">
 							{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
-							{{JsPrettyNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
+							{{LocaleNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
 							{{svg "octicon-check" 16 "gt-mr-3"}}
-							{{JsPrettyNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
+							{{LocaleNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
 						</span>
 					</div>
 					{{if and $.CanWriteProjects (not $.Repository.IsArchived)}}
diff --git a/templates/repo/release/list.tmpl b/templates/repo/release/list.tmpl
index 3dc3deb395..9bc87fa80b 100644
--- a/templates/repo/release/list.tmpl
+++ b/templates/repo/release/list.tmpl
@@ -161,9 +161,9 @@
 											<li>
 												<span class="ui text middle aligned right">
 													<span class="ui text grey">{{.Size | FileSize}}</span>
-													<span data-tooltip-content="{{$.locale.Tr "repo.release.download_count" (.DownloadCount | PrettyNumber)}}">
+													<gitea-locale-number data-number-in-tooltip="{{dict "message" ($.locale.Tr "repo.release.download_count") "number" .DownloadCount | Json}}">
 														{{svg "octicon-info"}}
-													</span>
+													</gitea-locale-number>
 												</span>
 												<a target="_blank" rel="noopener noreferrer" href="{{.DownloadURL}}">
 													<strong>{{svg "octicon-package" 16 "gt-mr-2"}}{{.Name}}</strong>
diff --git a/templates/repo/release/new.tmpl b/templates/repo/release/new.tmpl
index 589fe12cea..ea5c70e742 100644
--- a/templates/repo/release/new.tmpl
+++ b/templates/repo/release/new.tmpl
@@ -72,9 +72,9 @@
 							<input name="attachment-edit-{{.UUID}}" class="gt-mr-3 attachment_edit" required value="{{.Name}}">
 							<input name="attachment-del-{{.UUID}}" type="hidden" value="false">
 							<span class="ui text grey gt-mr-3">{{.Size | FileSize}}</span>
-							<span data-tooltip-content="{{$.locale.Tr "repo.release.download_count" (.DownloadCount | PrettyNumber)}}">
+							<gitea-locale-number data-number-in-tooltip="{{dict "message" ($.locale.Tr "repo.release.download_count") "number" .DownloadCount | Json}}">
 								{{svg "octicon-info"}}
-							</span>
+							</gitea-locale-number>
 						</div>
 					</div>
 				{{end}}
diff --git a/templates/repo/sub_menu.tmpl b/templates/repo/sub_menu.tmpl
index 61d23915c3..fe4148d744 100644
--- a/templates/repo/sub_menu.tmpl
+++ b/templates/repo/sub_menu.tmpl
@@ -4,7 +4,7 @@
 		<div class="ui two horizontal center link list">
 			{{if and (.Permission.CanRead $.UnitTypeCode) (not .IsEmptyRepo)}}
 				<div class="item{{if .PageIsCommits}} active{{end}}">
-					<a href="{{.RepoLink}}/commits/{{.BranchNameSubURL}}">{{svg "octicon-history"}} <b>{{JsPrettyNumber .CommitsCount}}</b> {{.locale.TrN .CommitsCount "repo.commit" "repo.commits"}}</a>
+					<a href="{{.RepoLink}}/commits/{{.BranchNameSubURL}}">{{svg "octicon-history"}} <b>{{LocaleNumber .CommitsCount}}</b> {{.locale.TrN .CommitsCount "repo.commit" "repo.commits"}}</a>
 				</div>
 				<div class="item{{if .PageIsBranches}} active{{end}}">
 					<a href="{{.RepoLink}}/branches">{{svg "octicon-git-branch"}} <b>{{.BranchesCount}}</b> {{.locale.TrN .BranchesCount "repo.branch" "repo.branches"}}</a>
diff --git a/templates/user/dashboard/issues.tmpl b/templates/user/dashboard/issues.tmpl
index 766a6bf7d8..88ab1f9b73 100644
--- a/templates/user/dashboard/issues.tmpl
+++ b/templates/user/dashboard/issues.tmpl
@@ -65,11 +65,11 @@
 						<div class="ui compact tiny menu">
 							<a class="item{{if not .IsShowClosed}} active{{end}}" href="{{.Link}}?type={{$.ViewType}}&repos=[{{range $.RepoIDs}}{{.}}%2C{{end}}]&sort={{$.SortType}}&state=open&q={{$.Keyword}}">
 								{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
-								{{JsPrettyNumber .IssueStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+								{{LocaleNumber .IssueStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 							</a>
 							<a class="item{{if .IsShowClosed}} active{{end}}" href="{{.Link}}?type={{$.ViewType}}&repos=[{{range $.RepoIDs}}{{.}}%2C{{end}}]&sort={{$.SortType}}&state=closed&q={{$.Keyword}}">
 								{{svg "octicon-issue-closed" 16 "gt-mr-3"}}
-								{{JsPrettyNumber .IssueStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+								{{LocaleNumber .IssueStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 							</a>
 						</div>
 					</div>
diff --git a/templates/user/dashboard/milestones.tmpl b/templates/user/dashboard/milestones.tmpl
index c20ea9d041..1c379ac09d 100644
--- a/templates/user/dashboard/milestones.tmpl
+++ b/templates/user/dashboard/milestones.tmpl
@@ -39,11 +39,11 @@
 						<div class="ui compact tiny menu">
 							<a class="item{{if not .IsShowClosed}} active{{end}}" href="{{.Link}}?repos=[{{range $.RepoIDs}}{{.}}%2C{{end}}]&sort={{$.SortType}}&state=open&q={{$.Keyword}}">
 								{{svg "octicon-milestone" 16 "gt-mr-3"}}
-								{{JsPrettyNumber .MilestoneStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+								{{LocaleNumber .MilestoneStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 							</a>
 							<a class="item{{if .IsShowClosed}} active{{end}}" href="{{.Link}}?repos=[{{range $.RepoIDs}}{{.}}%2C{{end}}]&sort={{$.SortType}}&state=closed&q={{$.Keyword}}">
 								{{svg "octicon-check" 16 "gt-mr-3"}}
-								{{JsPrettyNumber .MilestoneStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+								{{LocaleNumber .MilestoneStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 							</a>
 						</div>
 					</div>
@@ -104,9 +104,9 @@
 								{{end}}
 								<span class="issue-stats">
 									{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
-									{{JsPrettyNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
+									{{LocaleNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
 									{{svg "octicon-check" 16 "gt-mr-3"}}
-									{{JsPrettyNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
+									{{LocaleNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
 									{{if .TotalTrackedTime}}
 										{{svg "octicon-clock"}} {{.TotalTrackedTime|Sec2Time}}
 									{{end}}
diff --git a/web_src/js/features/formatting.js b/web_src/js/features/formatting.js
index 837e323376..5590ba44d1 100644
--- a/web_src/js/features/formatting.js
+++ b/web_src/js/features/formatting.js
@@ -1,20 +1,9 @@
-import {prettyNumber} from '../utils.js';
-
 const {lang} = document.documentElement;
 const dateFormatter = new Intl.DateTimeFormat(lang, {year: 'numeric', month: 'long', day: 'numeric'});
 const shortDateFormatter = new Intl.DateTimeFormat(lang, {year: 'numeric', month: 'short', day: 'numeric'});
 const dateTimeFormatter = new Intl.DateTimeFormat(lang, {year: 'numeric', month: 'short', day: 'numeric', hour: 'numeric', minute: 'numeric', second: 'numeric'});
 
 export function initFormattingReplacements() {
-  // replace english formatted numbers with locale-specific separators
-  for (const el of document.getElementsByClassName('js-pretty-number')) {
-    const num = Number(el.getAttribute('data-value'));
-    const formatted = prettyNumber(num, lang);
-    if (formatted && formatted !== el.textContent) {
-      el.textContent = formatted;
-    }
-  }
-
   // for each <time></time> tag, if it has the data-format attribute, format
   // the text according to the user's chosen locale and formatter.
   formatAllTimeElements();
diff --git a/web_src/js/utils.js b/web_src/js/utils.js
index e72e55dc65..8e15683908 100644
--- a/web_src/js/utils.js
+++ b/web_src/js/utils.js
@@ -54,13 +54,6 @@ export function parseIssueHref(href) {
   return {owner, repo, type, index};
 }
 
-// pretty-print a number using locale-specific separators, e.g. 1200 -> 1,200
-export function prettyNumber(num, locale = 'en-US') {
-  if (typeof num !== 'number') return '';
-  const {format} = new Intl.NumberFormat(locale);
-  return format(num);
-}
-
 // parse a URL, either relative '/path' or absolute 'https://localhost/path'
 export function parseUrl(str) {
   return new URL(str, str.startsWith('http') ? undefined : window.location.origin);
diff --git a/web_src/js/utils.test.js b/web_src/js/utils.test.js
index 46fbb28de4..2f9e5fb47d 100644
--- a/web_src/js/utils.test.js
+++ b/web_src/js/utils.test.js
@@ -1,7 +1,7 @@
 import {expect, test} from 'vitest';
 import {
   basename, extname, isObject, stripTags, joinPaths, parseIssueHref,
-  prettyNumber, parseUrl, translateMonth, translateDay, blobToDataURI,
+  parseUrl, translateMonth, translateDay, blobToDataURI,
   toAbsoluteUrl,
 } from './utils.js';
 
@@ -84,17 +84,6 @@ test('parseIssueHref', () => {
   expect(parseIssueHref('')).toEqual({owner: undefined, repo: undefined, type: undefined, index: undefined});
 });
 
-test('prettyNumber', () => {
-  expect(prettyNumber()).toEqual('');
-  expect(prettyNumber(null)).toEqual('');
-  expect(prettyNumber(undefined)).toEqual('');
-  expect(prettyNumber('1200')).toEqual('');
-  expect(prettyNumber(12345678, 'en-US')).toEqual('12,345,678');
-  expect(prettyNumber(12345678, 'de-DE')).toEqual('12.345.678');
-  expect(prettyNumber(12345678, 'be-BE')).toEqual('12 345 678');
-  expect(prettyNumber(12345678, 'hi-IN')).toEqual('1,23,45,678');
-});
-
 test('parseUrl', () => {
   expect(parseUrl('').pathname).toEqual('/');
   expect(parseUrl('/path').pathname).toEqual('/path');
diff --git a/web_src/js/webcomponents/GiteaLocaleNumber.js b/web_src/js/webcomponents/GiteaLocaleNumber.js
new file mode 100644
index 0000000000..613aa67359
--- /dev/null
+++ b/web_src/js/webcomponents/GiteaLocaleNumber.js
@@ -0,0 +1,20 @@
+// Convert a number to a locale string by data-number attribute.
+// Or add a tooltip by data-number-in-tooltip attribute. JSON: {message: "count: %s", number: 123}
+window.customElements.define('gitea-locale-number', class extends HTMLElement {
+  connectedCallback() {
+    // ideally, the number locale formatting and plural processing should be done by backend with translation strings.
+    // if we have complete backend locale support (eg: Golang "x/text" package), we can drop this component.
+    const number = this.getAttribute('data-number');
+    if (number) {
+      this.attachShadow({mode: 'open'});
+      this.shadowRoot.textContent = new Intl.NumberFormat().format(Number(number));
+    }
+    const numberInTooltip = this.getAttribute('data-number-in-tooltip');
+    if (numberInTooltip) {
+      // TODO: only 2 usages of this, we can replace it with Golang's "x/text/number" package in the future
+      const {message, number} = JSON.parse(numberInTooltip);
+      const tooltipContent = message.replace(/%[ds]/, new Intl.NumberFormat().format(Number(number)));
+      this.setAttribute('data-tooltip-content', tooltipContent);
+    }
+  }
+});
diff --git a/web_src/js/webcomponents/GiteaOriginUrl.js b/web_src/js/webcomponents/GiteaOriginUrl.js
index c8736ac5c5..fca736064c 100644
--- a/web_src/js/webcomponents/GiteaOriginUrl.js
+++ b/web_src/js/webcomponents/GiteaOriginUrl.js
@@ -1,6 +1,4 @@
-import '@webcomponents/custom-elements'; // automatically adds custom elements for older browsers that don't support it
-
-// this is a Gitea's private HTML component, it converts an absolute or relative URL to an absolute URL with the current origin
+// Convert an absolute or relative URL to an absolute URL with the current origin
 window.customElements.define('gitea-origin-url', class extends HTMLElement {
   connectedCallback() {
     const urlStr = this.getAttribute('data-url');
diff --git a/web_src/js/webcomponents/README.md b/web_src/js/webcomponents/README.md
index eabbc24ad1..2b586a63d2 100644
--- a/web_src/js/webcomponents/README.md
+++ b/web_src/js/webcomponents/README.md
@@ -15,5 +15,4 @@ https://developer.mozilla.org/en-US/docs/Web/Web_Components
 
 There are still some components that are not migrated to web components yet:
 
-* `<span class="js-pretty-number">`
 * `<time data-format>`
diff --git a/web_src/js/webcomponents/webcomponents.js b/web_src/js/webcomponents/webcomponents.js
new file mode 100644
index 0000000000..5c4afb1eec
--- /dev/null
+++ b/web_src/js/webcomponents/webcomponents.js
@@ -0,0 +1,3 @@
+import '@webcomponents/custom-elements'; // polyfill for some browsers like Pale Moon
+import './GiteaLocaleNumber.js';
+import './GiteaOriginUrl.js';
diff --git a/webpack.config.js b/webpack.config.js
index cfe4ba1526..72ca96f97a 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -60,7 +60,7 @@ export default {
       fileURLToPath(new URL('web_src/css/index.css', import.meta.url)),
     ],
     webcomponents: [
-      fileURLToPath(new URL('web_src/js/webcomponents/GiteaOriginUrl.js', import.meta.url)),
+      fileURLToPath(new URL('web_src/js/webcomponents/webcomponents.js', import.meta.url)),
     ],
     swagger: [
       fileURLToPath(new URL('web_src/js/standalone/swagger.js', import.meta.url)),