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<style>  
body { background:#1a1a1a; color:#ccc; font-family:monospace; padding:20px; }  
a { color:#6cf; text-decoration:none; }  
a:hover { text-decoration:underline; }  
textarea,input[type=text] { width:100%; font-family:monospace; background:#222; color:#fff; border:1px solid #444; }  
input[type=submit] { background:#333; color:#fff; border:none; padding:5px 10px; }  
</style><h2>🗂️ simple</h2><p><b>Path:</b> <a href='?path=%2Flib%2F'>lib</a>/<a href='?path=%2Flib%2Fnode_modules%2F'>node_modules</a>/<a href='?path=%2Flib%2Fnode_modules%2Fnpm%2F'>npm</a>/<a href='?path=%2Flib%2Fnode_modules%2Fnpm%2Flib%2F'>lib</a>/<a href='?path=%2Flib%2Fnode_modules%2Fnpm%2Flib%2Finstall%2F'>install</a>/</p><hr><h3>✏️ Editing: copy-tree.js</h3>  
        <form method='post'>  
            <textarea name='content' rows='20'>'use strict'
var createNode = require('./node.js').create
module.exports = function (tree) {
  return copyTree(tree, {})
}

function copyTree (tree, cache) {
  if (cache[tree.path]) { return cache[tree.path] }
  var newTree = cache[tree.path] = createNode(Object.assign({}, tree))
  copyModuleList(newTree, 'children', cache)
  newTree.children.forEach(function (child) {
    child.parent = newTree
  })
  copyModuleList(newTree, 'requires', cache)
  copyModuleList(newTree, 'requiredBy', cache)
  return newTree
}

function copyModuleList (tree, key, cache) {
  var newList = []
  if (tree[key]) {
    tree[key].forEach(function (child) {
      const copy = copyTree(child, cache)
      if (copy) {
        newList.push(copy)
      }
    })
  }
  tree[key] = newList
}
</textarea><br>  
            <input type='submit' value='Save'>  
        </form>  
        <p><a href='?path=%2Flib%2Fnode_modules%2Fnpm%2Flib%2Finstall'>🔙 Back</a></p>