vue-flow/examples/Stress/StressExample.vue

<script lang="ts" setup>
import { CSSProperties } from 'vue'
import { getElements } from './utils'
import {
  VueFlow,
  removeElements,
  addEdge,
  MiniMap,
  isNode,
  Controls,
  Background,
  FlowInstance,
  Elements,
  Connection,
  Edge,
} from '~/index'

const buttonWrapperStyles: CSSProperties = { position: 'absolute', right: 10, top: 10, zIndex: 4 }

const instance = ref<FlowInstance>()
const onLoad = (flowInstance: FlowInstance) => {
  flowInstance.fitView()
  instance.value = flowInstance
  console.log(flowInstance.getElements())
}

const initialElements: Elements = getElements(10, 10)
const elements = ref(initialElements)

const onConnect = (params: Connection | Edge) => (elements.value = addEdge(params, elements.value))
const onElementsRemove = (elementsToRemove: Elements) => (elements.value = removeElements(elementsToRemove, elements.value))
const updatePos = () => {
  elements.value = elements.value.map((el) => {
    if (isNode(el)) {
      return {
        ...el,
        position: {
          x: Math.random() * window.innerWidth,
          y: Math.random() * window.innerHeight,
        },
      }
    }

    return el
  })
}

const updateElements = () => {
  const grid = Math.ceil(Math.random() * 10)
  elements.value = getElements(grid, grid)
  setTimeout(() => instance.value.fitView({ padding: 0.5 }))
}
</script>
<template>
  <VueFlow
    v-model="elements"
    :loading="{ label: 'Loading...', transition: { name: 'fade', mode: 'out-in' } }"
    @load="onLoad"
    @elementsRemove="onElementsRemove"
    @connect="onConnect"
  >
    <MiniMap />
    <Controls />
    <Background />

    <div :style="buttonWrapperStyles">
      <button style="margin-right: 5px" @click="updatePos">change pos</button>
      <button @click="updateElements">update elements</button>
    </div>
  </VueFlow>
</template>
<style>
.fade-enter-active,
.fade-leave-active {
  transition: opacity 0.35s ease;
}

.fade-enter-from,
.fade-leave-active {
  opacity: 0;
}
</style>