CSS parser skips selectors before commas (e.g. .hello, .ivan → .ivan only) #127
Description
When parsing CSS with comma-separated selectors, only the last selector is kept.
This issue was found using the example code from the official documentation on pkg.go.dev/github.com/tdewolff/parse/v2/css.
Here’s the exact example (taken and slightly modified from the official docs):
package main
import (
"bytes"
"fmt"
"github.com/tdewolff/parse/v2"
"github.com/tdewolff/parse/v2/css"
)
func main() {
r := bytes.NewBufferString(".hello, .x, .ivan {color: red;} .ivan {color: blue;} @keframes x {from {color:blue}}")
// false because this is not inline style content
p := css.NewParser(parse.NewInput(r), false)
out := ""
for {
gt, _, data := p.Next()
if gt == css.ErrorGrammar {
break
} else if gt == css.AtRuleGrammar || gt == css.BeginAtRuleGrammar || gt == css.BeginRulesetGrammar || gt == css.DeclarationGrammar {
out += string(data)
if gt == css.DeclarationGrammar {
out += ":"
}
for _, val := range p.Values() {
out += string(val.Data)
}
if gt == css.BeginAtRuleGrammar || gt == css.BeginRulesetGrammar {
out += "{"
} else if gt == css.AtRuleGrammar || gt == css.DeclarationGrammar {
out += ";"
}
} else {
out += string(data)
}
}
fmt.Println(out)
}
Output:
.ivan{color:red;}.ivan{color:blue;}@keframes x{from {color:blue}}
Expected output:
.hello, .x, .ivan{color:red;}.ivan{color:blue;}@keframes x{from {color:blue}}
It seems that the parser skips selectors before commas, as if comma-separated selector lists are not properly recognized by the grammar.