next-operation-history

Operation history for next.

installation

npm install -S @jswork/next-operation-history

structure

{
  max: 100,
  engine: 'local', // session
  prefix:'wbs', // wbs__operation_history@
  index: 0,  // the pointer
  data: [
    { id:'obj_hash1', value: 'json1'},
    { id:'obj_hash2', value: 'json2'},
    { id:'obj_hash3', value: 'json3'},
    { id:'obj_hash4', value: 'json4'},
  ]
}

configuration

{
  max: 10,
  engine: 'local', // session
  prefix: 'nx'
}

methods

| api | params | description | | ------- | ------- | ---------------------------------------- | | reset | - | Set index/data to default options value. | | last | - | Get last index. | | at | -/index | Get current(index) item at index. | | get | (id) | Get data by id. | | gets | - | Get all storage data. | | forward | - | Move index to next. | | back | - | Move index to previous. | | go | index | Move to the index. | | push | data | Push data to items. | | replace | data | Replace the last item. | | add | data | Add to the store without judgement. | | del | id | Remove all the equal id elements. |

properties

| api | description | | ------ | --------------------------- | | next | Property: can forward? | | prev | Property: can back? | | length | Property: data size | | index | Property: Pointer | | data | Property: the original data |

usage

import NxOperationHistory from '@feizheng/next-operation-history';

// code goes here:
const noh = new NxOperationHistory({ prefix: 'abc', max: 20, engine:'local' });

// save:
noh.push();
noh.at():

// undo
noh.back();
noh.at();

// redo
noh.forward();
noh.at();

// can next?
noh.next

// can previous?
noh.prev

license

Code released under the MIT license.