substance/util/ArrayTree.js

Substance is a JavaScript library for web-based content editing. It provides building blocks for realizing custom text editors and web-based publishing systems.

import deleteFromArray from './deleteFromArray'

// simplified version of TreeIndex for arrays
class ArrayTree {
  add(path, val) {
    if (!this[path]) {
      this[path] = []
    }
    this[path].push(val)
  }
  remove(path, val) {
    if (this[path]) {
      deleteFromArray(this[path], val)
    }
  }
  get(path) {
    return this[path] || []
  }
}

export default ArrayTree