Support boolean attributes

README.md

@@ -198,12 +198,16 @@ h('a', {props: {href: '/foo'}, 'Go to Foo');
 
 ### The attributes module
 
-Same as props but set attributes instead of properties on DOM elements (i.e. `setAttribute`).
+Same as props but set attributes instead of properties on DOM elements
 
 ```javascript
 h('a', {attrs: {href: '/foo'}, 'Go to Foo');
 ```
 
+Attributes are added and updated using `setAttribute`. In case of an attribute that has been previously added/set is no longer present in the `attrs` object, it is removed from the DOM elemnt's attribute list using `removeAttribute`. 
+
+In the case of boolean attributes (.e.g. `disabled`, `hidden`, `selected` ...). The meaning doesn't depend on the attribute value (`true` of `false`) but depends instead on the presence/absence of the attribute itself in the DOM element. Those attributes are handled differently by the module : if a boolean attribute is set to a [falsy value](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean) (`0`, `-0`, `null`, `false`, `NaN`, `undefined`, or the empty string (`""`)) then the attribute will be removed from the attribute list of the DOM element.
+
 ### The style module
 
 The style module is for making your HTML look slick and animate smoothly. At

modules/attributes.js

@@ -1,5 +1,5 @@
 function isBooleanAttribute(attrName) {
-    return (/^(?:allowfullscreen|async|autofocus|autoplay|checked|compact|controls|declare|default|defaultchecked|defaultmuted|defaultselected|defer|disabled|draggable|enabled|formnovalidate|hidden|indeterminate|inert|ismap|itemscope|loop|multiple|muted|nohref|noresize|noshade|novalidate|nowrap|open|pauseonexit|readonly|required|reversed|scoped|seamless|selected|sortable|spellcheck|translate|truespeed|typemustmatch|visible)$/).test(attrName);
+  return (/^(?:allowfullscreen|async|autofocus|autoplay|checked|compact|controls|declare|default|defaultchecked|defaultmuted|defaultselected|defer|disabled|draggable|enabled|formnovalidate|hidden|indeterminate|inert|ismap|itemscope|loop|multiple|muted|nohref|noresize|noshade|novalidate|nowrap|open|pauseonexit|readonly|required|reversed|scoped|seamless|selected|sortable|spellcheck|translate|truespeed|typemustmatch|visible)$/).test(attrName);
 }
 
 function updateAttrs(oldVnode, vnode) {