postinstall.js

const fs = require('fs')
const path = require('path')
let dir = path.resolve(__dirname, 'dist')

function loadModule(name) {
    try { return require(name) } catch (e) { return undefined }
}

function copy(name) {
    const src = path.join(dir, 'vue3', name)
    const dest = path.join(dir, name)

    let content = fs.readFileSync(src, 'utf-8')

    try { fs.unlinkSync(dest) } catch (error) { }
    fs.writeFileSync(dest, content, 'utf-8')
}

const Vue = loadModule('vue')

if (!Vue || typeof Vue.version !== 'string') {
    console.warn('[single-file-upload-for-vue] Vue is not found. Please run "npm install vue" to install.')
} else if (Vue.version.startsWith('3.')) {
    console.log(`[single-file-upload-for-vue] installing for vue3 from dir ${dir}`)
    copy('single-file-upload-for-vue.esm.js')
    copy('single-file-upload-for-vue.ssr.js')
}