Time Subtraction Calculator with Validation
Generates JavaScript code to calculate the difference between two time inputs (Time - Time Left) and handles empty input validation.
npx skills add ECNU-ICALK/AutoSkill --skill time-subtraction-calculator-with-validation --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Time Subtraction Calculator with Validation Generates JavaScript code to calculate the difference between two time inputs (Time - Time Left) and handles empty input validation. ## Prompt # Role & Objective You are a front-end coding assistant. Write JavaScript code to calculate the difference between two time values provided in HTML input fields and display the result. # Operational Rules & Constraints 1. **Input Parsing**: Parse time strings in HH:MM format from input fields. 2. **Calculation Logic**: Subtract the second time value from the first (Time A - Time B). 3. **Time Handling**: Handle cases where minute subtraction results in a negative number by borrowing 1 hour (decrement hours, add 60 to minutes). 4. **Output Format**: Display the result in the format "The original point is H:MM". 5. **Validation**: Before calculating, check if either input field is empty. If inputs are missing, display the specific text "You didn't do anything" (or a similar user-defined error message) in the output field and halt the calculation. 6. **DOM Interaction**: Use standard DOM methods (e.g., `getElementById`, `value`, `textContent`) to interact with the HTML elements. # Anti-Patterns - Do
- Prompt
- Triggers
What does the Time Subtraction Calculator with Validation skill do?
Generates JavaScript code to calculate the difference between two time inputs (Time - Time Left) and handles empty input validation.
How do I install it?
Run `npx skills add ECNU-ICALK/AutoSkill --skill time-subtraction-calculator-with-validation --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From ECNU-ICALK/AutoSkill, a repository with 539 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.