undoit
v1.1.1
Published
Simple undo, redo system for JavaScript/TypeScript.
Downloads
13
Readme
Undoit
Simple undo, redo system for JavaScript/TypeScript.
How to use
import { Action, UndoRedo } from 'undoit'
const command = new UndoRedo()
let acc = 0
const execute = () => {
acc++
}
const undo = () => {
acc--
}
command.execute(new Action(execute, undo))
acc // 1
command.undo()
acc // 0
command.redo()
acc // 1
Work asynchronously
import { AsyncAction, AsyncUndoRedo } from 'undoit'
const command = new AsyncUndoRedo()
let acc = 0
function delay(interval) {
return new Promise((resolve) => {
setTimeout(resolve, interval)
})
}
const execute = async () => {
await delay(100)
acc++
}
const undo = async () => {
await delay(100)
acc--
}
await command.execute(new AsyncAction(execute, undo))
acc // 1
await command.undo()
acc // 0
await command.redo()
acc // 1
// without a await keyword
command.undo()
command.isBusy // true
Manage easily with state history
import { StateHistory } from 'undoit'
const initialValue = 1
const history = new StateHistory(1)
history.data // 1
history.push(2)
history.data // 2
history.undo()
history.data // 1
history.redo()
history.data // 2
Install
|Site|Link| |---|---| |NPM|View| |Github|View| |jsdelivr|Download|
Node.js (commonjs)
npm i undoit
Browser (esmodule)
<script type="module">
import { Action, UndoRedo } from 'https://cdn.jsdelivr.net/npm/[email protected]/dist/esm/index.min.js'
</script>
License
MIT LICENSE