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JavaScript drawing - Exercises, Practice, Solution

JavaScript drawing [6 exercises with solution]

[An editor is available at the bottom of the page to write and execute the scripts.]

1. Write a JavaScript program to draw the following rectangular shape. Go to the editor
Expected Output :
rectagular shape
Click me to see the solution

2. Write a JavaScript program to draw a circle. Go to the editor
Expected Output :
draw a circle
Click me to see the solution

3. Write a JavaScript program to draw two intersecting rectangles, one of which has alpha transparency. Go to the editor
Expected Output :
intersecting rectangles
Click me to see the solution

4. Write a JavaScript program to draw the following right-angled triangle. Go to the editor
Expected Output :
right angled triangle
Click me to see the solution

5. Write a JavaScript program to draw the following diagram [use moveto() function]. Go to the editor
Expected Output :
draw fun
Click me to see the solution

6. Write a JavaScript program to draw the following diagram [diagonal, white to black circles]. Go to the editor
Expected Output :
diagonal, white to black circles
Click me to see the solution

More to Come !

* To run the code mouse over on Result panel and click on 'RERUN' button.*

Live Demo:

See the Pen javascript-common-editor by w3resource (@w3resource) on CodePen.


Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.



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JavaScript: Tips of the Day

Checks if the provided argument is array-like (i.e. is iterable)

Example:

const isArrayLike = obj => obj != null && typeof obj[Symbol.iterator] === 'function';
console.log(isArrayLike(document.querySelectorAll('.className'))); // true
console.log(isArrayLike('abc')); // true
console.log(isArrayLike(null)); // false

Output:

true
true
false