⚡ v3.1
ThreEva Editor
Math · Image layouts · Table editing · Dark/Light mode
🌙 Toggle page dark
Live Demo —
id="threeva_editor"
is all you need
<h2>ThreEva Editor v3.1</h2> <p>Try the <strong>Math Editor</strong> — click the ∑ button in the toolbar. You'll see all 7 categories with visual cards. Click multiple cards to <strong>append</strong> — they never replace each other.</p> <p>Example: click <em>Vector</em>, then <em>Fraction</em>, then <em>Integral</em> — they all combine in one expression.</p> <ul> <li>🌙 Click the <strong>moon icon</strong> in toolbar to toggle dark mode</li> <li>Right-click any table cell → add/remove rows & columns</li> <li>Right-click any image → edit, resize, delete</li> <li>Double-click any math formula to edit it</li> </ul>
📤 Submit & Get HTML
📋 JS API
💡 Math Editor tips
Append, never replace:
Every card click adds to your expression at the cursor position
Build complex expressions:
e.g. click Vector → then Fraction → then Integral → all combine
Undo button
removes the last appended template
{ } button
wraps selected text in curly braces
Inline vs Block:
Inline renders inside text; Block renders centered on its own line
Live Preview
updates instantly as you type or click cards
Double-click
any rendered equation to re-open the editor
Right-click
any equation for Edit / Copy LaTeX / Delete