Feature/#250 wait style (#255)

* Added support for parsed styles

* Added stdlib function.

* Added e2e tests

* Added e2e tests for STYLE_* functions

pkg/stdlib/html/attr_remove.go

@@ -0,0 +1,41 @@
+package html
+
+import (
+	"context"
+
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
+	"github.com/MontFerret/ferret/pkg/runtime/values/types"
+)
+
+// AttributeRemove removes single or more attribute(s) of a given element.
+// @param el (HTMLElement) - Target element.
+// @param names (...String) - Attribute name(s).
+func AttributeRemove(ctx context.Context, args ...core.Value) (core.Value, error) {
+	err := core.ValidateArgs(args, 2, core.MaxArgs)
+
+	if err != nil {
+		return values.None, err
+	}
+
+	el, err := resolveElement(args[0])
+
+	if err != nil {
+		return values.None, err
+	}
+
+	attrs := args[1:]
+	attrsStr := make([]values.String, 0, len(attrs))
+
+	for _, attr := range attrs {
+		str, ok := attr.(values.String)
+
+		if !ok {
+			return values.None, core.TypeError(attr.Type(), types.String)
+		}
+
+		attrsStr = append(attrsStr, str)
+	}
+
+	return values.None, el.RemoveAttribute(ctx, attrsStr...)
+}