ReferenceError : "window is not defined" [issue link] code: header.vue: export default { data(){ return { msgShadeHeight: window.innerHeight, // 消息遮罩,点击消息旁边生成的遮罩 //... } }, } could u please tell me whats the correct way to use “window” in data ? thank u very much! This question is available on Nuxt.js community (#c1857)