Tell us about your environment

• ESLint Version: 4.14.0
• eslint-plugin-vue Version: 4.3.0
• Node Version: 8.9.4

Please show your full configuration:

"vue/attributes-order": [2, {
 order: [
 "DEFINITION",
 "LIST_RENDERING",
 "CONDITIONALS",
 "RENDER_MODIFIERS",
 "GLOBAL",
 "UNIQUE",
 "CONTENT",
 "OTHER_ATTR",
 "BINDING",
 "EVENTS"
 ]
 }]

What did you do? Please include the actual source code causing the issue.

<div v-if="isVisible" v-dom-portal="true" :class="classes"></div>

What did you expect to happen?
v-dom-portal directive should not fail linting, as it should be OTHER_ATTR imo

What actually happened? Please include the actual, raw output from ESLint.
Instead it seems to be recognised as either DEFINITION or LIST_RENDERING, and the following message displays:

Attribute "v-dom-portal" should go before "v-if". (vue/attributes-order)