Algoritmler (animasiýa)Brauzeriňizde işleýärBarlanan sene: 1 oktýabr 2026

Undo / Redo Stack: animasiýa

Undo / Redo Stack: animasiýa. Frontend üçin animasiýaly algoritmler: tertipleme, gözleg, debounce we throttle, event loop, wirtual DOM, keş, trie we ýol gözlegi. Brauzeriňizde çalt, gizlin we ýönekeý.

Ýerliadaty ýagdaýda gizlinÇaltagza bolmak gerek däl

Aşakdaky guralyň düwmeleri we tekstleri heniz iňlis dilinde.

Data structuresTime: O(1) per actionSpace: O(history)

Actions (type x / undo / redo)

Undo stack (top is on the right)

Redo stack (top is on the right)

Current text

∅

Step 1 / 16

Undo/redo uses two stacks. The undo stack remembers earlier states; the redo stack remembers states you undid.

checking
found / in view
ruled out

JavaScript

1class History {
2  constructor() { this.undoStack = []; this.redoStack = []; this.text = ""; }
3  type(ch) {
4    this.undoStack.push(this.text);
5    this.text += ch;
6    this.redoStack = [];
7  }
8  undo() {
9    if (!this.undoStack.length) return;
10    this.redoStack.push(this.text);
11    this.text = this.undoStack.pop();
12  }
13  redo() {
14    if (!this.redoStack.length) return;
15    this.undoStack.push(this.text);
16    this.text = this.redoStack.pop();
17  }
18}

Tip: use the arrow keys to step and the space bar to play or pause.

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