Install

npm install cascade-helper --save

Class

• subKey (string): key name of represent sub object
• valueKey (string): key name of represent value

const cascadeHelper = new CascadeHelper([(subKey = 'children')], [(valueKey = 'value')])

Instance Methods

deepFlatten

cascadeHelper.deepFlatten(cascades[, options])

- *cascades

Array<Cascade>

- options

KEY	TYPE	DEFAULT
labels	Array<string>	[]
itemSeparator	string	'-'
endLevel	nubmer

const cascades = [
  { name: '0.0', value: '0.0', children: [{ name: '1.0', value: '1.0' }, { name: '1.1', value: '1.1' }] },
  { name: '0.1', value: '0.1', children: [{ name: '1.0', value: '1.0' }, { name: '1.1', value: '1.1' }] },
]

const results = cascadeHelper.deepFlatten(cascades, { labels: ['name'] })

console.log(results)
/****
  [
    { strs: { name: '0.0-1.0' }, cascade: { name: '1.0', value: '1.0' }, path: '[0].children[0]' },
    { strs: { name: '0.0-1.1' }, cascade: { name: '1.1', value: '1.1' }, path: '[0].children[1]' },
    { strs: { name: '0.1-1.0' }, cascade: { name: '1.0', value: '1.0' }, path: '[1].children[0]' },
    { strs: { name: '0.1-1.1' }, cascade: { name: '1.1', value: '1.1' }, path: '[1].children[1]' },
  ]
 ****/

deepForEach

cascadeHelper.deepForEach(cascades, callback[, options])

- *cascades

Array<Cascade>

- *callback

(cascade, level, index) => void

ARG	TYPE
cascade	Cascade
level	number
index	number

- options

KEY	TYPE	DEFAULT
startLevel	number	0
endLevel	number

const cascades = [
  { name: '0.0', value: '0.0', children: [{ name: '1.0', value: '1.0' }, { name: '1.1', value: '1.1' }] },
  { name: '0.1', value: '0.1', children: [{ name: '1.0', value: '1.0' }, { name: '1.1', value: '1.1' }] },
]

cascadeHelper.deepForEach(cascades, (cascade, level, index) => {
  cascade.name = `modify-${level}-${index}`
})

console.log(cascades)
/****
[
  { name: 'modify-0-0', value: '0.0', children: [{ name: 'modify-1-0', value: '1.0' }, { name: 'modify-1-1', value: '1.1'}] },
  { name: 'modify-0-1', value: '0.1', children: [{ name: 'modify-1-0', value: '1.0' }, { name: 'modify-1-1', value: '1.1'}] },
]
 ****/

deepMap

cascadeHelper.deepMap(cascades, callback[, options])

- *cascades

Array<Cascade>

- *callback

(cascade, level, index, path, parent) => void

ARG	TYPE
cascade	Cascade
level	number
index	number
path	string
parent	Cascade

- options

KEY	TYPE	DEFAULT
startLevel	number	0

const cascades = [
  { name: '0.0', value: '0.0', children: [{ name: '1.0', value: '1.0' }, { name: '1.1', value: '1.1' }] },
  { name: '0.1', value: '0.1', children: [{ name: '1.0', value: '1.0' }, { name: '1.1', value: '1.1' }] },
]

const results = cascadeHelper.deepMap(cascades, (cascade, level, index, path) => {
  return { ...cascade, name: `modify-${currentLevel}-${currentIndex}`, path }
})

console.log(results)
/****
[
  { name: 'modify-0-0', value: '0.0', path: '[0]', children: [{ name: 'modify-1-0', value: '1.0', path: '[0].children[0]' }, { name: 'modify-1-1', value: '1.1', path: '[0].children[1]'}] },
  { name: 'modify-0-1', value: '0.1', path: '[1]', children: [{ name: 'modify-1-0', value: '1.0', path: '[1].children[0]' }, { name: 'modify-1-1', value: '1.1', path: '[1].children[1]'}] },
]
 ****/

getLevelCascades

cascadeHelper.getLevelCascades(cascades, values, level)

- *cascades

Array<Cascade>

- *values

- *level

const cascades = [
  { name: '0.0', value: '0.0', children: [{ name: '1.0', value: '1.0' }, { name: '1.1', value: '1.1' }] },
  { name: '0.1', value: '0.1', children: [{ name: '1.0', value: '1.0' }, { name: '1.1', value: '1.1' }] },
]

const current = cascadeHelper.getLevelCascades(cascades, { level0: '0.0', level1: '1.1' }, 1)

console.log(current)
/****
{
  cascades: [{ name: '1.0', value: '1.0' }, { name: '1.1', value: '1.1' }],
  path: '[0].children',
  parent: {
    cascade: cascades[0],
    index: 0,
    level: 0,
  },
}
 ****/

initValues

cascadeHelper.initValues(cascades, level[, index])

deepFill

cascadeHelper.deepFill(cascades[, options])

parse

cascadeHelper.parse(str, callback[, options])

- *str

string

- *callback

(key, valueKey, level, index) => Cascade

ARG	TYPE
key	string
valueKey	string
level	number
index	number

- options

KEY	TYPE	DEFAULT
itemSeparator	string	'-'
levelSeparator	string	'\n'

const str = '1-1\n1-2\n2-1\n1-1-1'

const results = cascadeHelper.parse(str, (key, valueKey, level, index) => {
  return { name: key, [valueKey]: `${level}.${index}`, other: 'other' }
})

console.log(results)
/****
[
  {
    name: '1',
    value: '0.0',
    other: 'other',
    children: [
      { name: '1', value: '1.0', other: 'other', children: [{ name: '1', value: '2.0', other: 'other' }] },
      { name: '2', value: '1.1', other: 'other' },
    ],
  },
  { name: '2', value: '0.1', other: 'other', children: [{ name: '1', value: '1.0', other: 'other' }] },
]
 ****/

stringify

cascadeHelper.stringify(cascades, label[, options])

Examples

• CascadeDropdown