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Fix some missing JS class collector cases

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Fixes #7216
This commit is contained in:
Bjørn Erik Pedersen 2020-04-27 17:49:51 +02:00
parent fe60b7d9e4
commit c03ea2b660
2 changed files with 18 additions and 17 deletions
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24
publisher/htmlElementsCollector.go
View file

@ -14,9 +14,10 @@
package publisher
import (
"regexp"
"github.com/gohugoio/hugo/helpers"
"golang.org/x/net/html"
yaml "gopkg.in/yaml.v2"
"bytes"
"sort"
@ -196,7 +197,10 @@ func isQuote(b byte) bool {
return b == '"' || b == '\''
}
var htmlJsonFixer = strings.NewReplacer(", ", "\n")
var (
htmlJsonFixer = strings.NewReplacer(", ", "\n")
jsonAttrRe = regexp.MustCompile(`'?(.*?)'?:.*`)
)
func parseHTMLElement(elStr string) (el htmlElement) {
elStr = strings.TrimSpace(elStr)
@ -225,27 +229,15 @@ func parseHTMLElement(elStr string) (el htmlElement) {
val := strings.TrimSpace(a.Val)
if strings.Contains(key, "class") && strings.HasPrefix(val, "{") {
// This looks like a Vue or AlpineJS class binding.
// Try to unmarshal it as YAML and pull the keys.
// This may look odd, as the source is (probably) JS (JSON), but the YAML
// parser is much more lenient with simple JS input, it seems.
m := make(map[string]interface{})
val = htmlJsonFixer.Replace(strings.Trim(val, "{}"))
// Remove leading space to make it look like YAML.
lines := strings.Split(val, "\n")
for i, l := range lines {
lines[i] = strings.TrimSpace(l)
}
val = strings.Join(lines, "\n")
err := yaml.Unmarshal([]byte(val), &m)
if err == nil {
for k := range m {
el.Classes = append(el.Classes, strings.Fields(k)...)
}
} else {
// Just insert the raw values. This is used for CSS class pruning
// so, it's important not to leave out values that may be a CSS class.
val = jsonAttrRe.ReplaceAllString(val, "$1")
el.Classes = append(el.Classes, strings.Fields(val)...)
}
}
}
}

9
publisher/htmlElementsCollector_test.go
View file

@ -70,6 +70,15 @@ func TestClassCollector(t *testing.T) {
{"Alpine bind 4", `<div x-bind:class="{ 'text-gray-800': !checked,
'text-white': checked }"></div>`, f("div", "text-gray-800 text-white", "")},
{"Alpine bind 5", `<a x-bind:class="{
'text-a': a && b,
'text-b': !a && b || c,
'pl-3': a === 1,
pl-2: b == 3,
'text-gray-600': (a > 1)
}" class="block w-36 cursor-pointer pr-3 no-underline capitalize"></a>`, f("a", "block capitalize cursor-pointer no-underline pl-2 pl-3 pr-3 text-a text-b text-gray-600 w-36", "")},
{"Vue bind", `<div v-bind:class="{ active: isActive }"></div>`, f("div", "active", "")},
} {
c.Run(test.name, func(c *qt.C) {