Improving the boolean attributes support

lib/dom.js

@@ -143,27 +143,14 @@ const fill = template => {
 const value = (tokens, node, name, template) => {
   const { length } = tokens
 
-  if (!length) {
-    return
-  }
-
-  let value = node.getAttribute(name)
-
-  if (length === 1) {
-    const [{ key, optional }] = tokens
-
-    value = resolve(key, optional, template)
-
-    if (isFilled(value)) {
-      node.setAttribute(name, value)
-    } else {
-      node.removeAttribute(name)
-    }
 
+  if (!length) {
     return
   }
 
   const values = []
+  const initial = node.getAttribute(name)
+  let value = initial
 
   for (const { identifier, key, optional } of tokens) {
     const [prefix] = value.split(identifier)
@@ -173,7 +160,13 @@ const value = (tokens, node, name, template) => {
     value = value.replace(`${prefix}${identifier}`, '')
   }
 
-  node.setAttribute(name, values.join(''))
+  value = values.join('')
+
+  if (length === 1 && value === '' && initial === tokens[0].identifier) {
+    node.removeAttribute(name)
+  } else {
+    node.setAttribute(name, value)
+  }
 }
 
 const content = (tokens, node, template) => {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@lcf.vs/dom-engine",
-  "version": "4.0.1",
+  "version": "4.0.2",
   "description": "A composable DOM based template engine",
   "type": "module",
   "scripts": {