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client/.nuxt/components/nuxt.js

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+import Vue from 'vue'
+import { compile } from '../utils'
+
+import NuxtError from './nuxt-error.vue'
+
+import NuxtChild from './nuxt-child'
+
+export default {
+  name: 'Nuxt',
+  components: {
+    NuxtChild,
+    NuxtError
+  },
+  props: {
+    nuxtChildKey: {
+      type: String,
+      default: undefined
+    },
+    keepAlive: Boolean,
+    keepAliveProps: {
+      type: Object,
+      default: undefined
+    },
+    name: {
+      type: String,
+      default: 'default'
+    }
+  },
+  errorCaptured (error) {
+    // if we receive and error while showing the NuxtError component
+    // capture the error and force an immediate update so we re-render
+    // without the NuxtError component
+    if (this.displayingNuxtError) {
+      this.errorFromNuxtError = error
+      this.$forceUpdate()
+    }
+  },
+  computed: {
+    routerViewKey () {
+      // If nuxtChildKey prop is given or current route has children
+      if (typeof this.nuxtChildKey !== 'undefined' || this.$route.matched.length > 1) {
+        return this.nuxtChildKey || compile(this.$route.matched[0].path)(this.$route.params)
+      }
+
+      const [matchedRoute] = this.$route.matched
+
+      if (!matchedRoute) {
+        return this.$route.path
+      }
+
+      const Component = matchedRoute.components.default
+
+      if (Component && Component.options) {
+        const { options } = Component
+
+        if (options.key) {
+          return (typeof options.key === 'function' ? options.key(this.$route) : options.key)
+        }
+      }
+
+      const strict = /\/$/.test(matchedRoute.path)
+      return strict ? this.$route.path : this.$route.path.replace(/\/$/, '')
+    }
+  },
+  beforeCreate () {
+    Vue.util.defineReactive(this, 'nuxt', this.$root.$options.nuxt)
+  },
+  render (h) {
+    // if there is no error
+    if (!this.nuxt.err) {
+      // Directly return nuxt child
+      return h('NuxtChild', {
+        key: this.routerViewKey,
+        props: this.$props
+      })
+    }
+
+    // if an error occurred within NuxtError show a simple
+    // error message instead to prevent looping
+    if (this.errorFromNuxtError) {
+      this.$nextTick(() => (this.errorFromNuxtError = false))
+
+      return h('div', {}, [
+        h('h2', 'An error occurred while showing the error page'),
+        h('p', 'Unfortunately an error occurred and while showing the error page another error occurred'),
+        h('p', `Error details: ${this.errorFromNuxtError.toString()}`),
+        h('nuxt-link', { props: { to: '/' } }, 'Go back to home')
+      ])
+    }
+
+    // track if we are showing the NuxtError component
+    this.displayingNuxtError = true
+    this.$nextTick(() => (this.displayingNuxtError = false))
+
+    return h(NuxtError, {
+      props: {
+        error: this.nuxt.err
+      }
+    })
+  }
+}