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Fiverr Pro
English
$
USD
I will build a custom javascript calculator or interactive web tool
KHANZADII
About this gig
Need a premium interactive tool or custom JavaScript calculator built from scratch? You are in the right place!
A static website can only take your business so far. Dynamic widgets keep users engaged longer and drastically improve conversion rates. I specialize in programming highly efficient, semantic, and modular client-side components using Pure JavaScript (Vanilla JS), HTML5, and CSS3.
What I Can Build For You:
Custom Pricing & ROI Calculators
Academic Systems (Grade, GPA, or Result Card Calculators)
Dynamic Multi-Step Forms & Data Filters
Premium Dark-Mode / Neon Layouts
Why My Code Stands Out:
Scoped Architecture: Implementations structured under managed object namespaces to guarantee absolute zero global scope pollution.
Floating-Point Precision Fixed: Deterministic math correction loops using exponential shifts to eliminate native JS IEEE 754 precision bugs (like 0.1+0.2 rendering errors).
Full Keyboard Interception: Smooth event listener mappings allowing native physical keyboard input validation.
100% Mobile Fluid Layouts: Advanced explicit box models for fluid responsiveness on all screens.
Message me before placing an order to discuss your logic!
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know KHANZADII
KHANZADII
FrontEnd Developer
- FromPakistan
- Member sinceJun 2026
- Avg. response time1 hour
Languages
English, Urdu
I am a Front-End Developer based in Islamabad, Pakistan, with specialized experience in landing page design. I am passionate about front-end development and leverage my background in Computer Science from Women University Swabi to create engaging user interfaces.
My Portfolio
FAQ
What do you need from me to start the project?
I will need the clear mathematical logic or formulas for your calculator, your preferred color scheme (or branding guidelines), and details about the platform where you want to embed the tool (e.g., WordPress, Wix, Shopify, or a custom HTML site).
Will the calculator work flawlessly on mobile screens?
Yes, absolutely. Every widget or calculator I build is structured using advanced responsive grid layouts and explicit box models. This ensures fluid scalability across mobile, tablet, and desktop panels.
Does your JavaScript code cause global scope pollution?
No. To ensure high production standards, all methods and logical state-machines are strictly encapsulated under a centralized managed object namespace literal. This prevents any global window namespace pollution and eliminates side effects from third-party scripts.
