public/subjects/pick-and-click/README.md

Pick & click

Instructions

Today, you're gonna create your own color picker.

Write the function pick which turns the screen into a hsl color picker, varying the hue and luminosity of according to the position of the mouse, which:

• changes the background color of the body, so the hsl value is different on each mouse position on the screen:
  • on the axis X, the hue value has to vary between 0 and 360
  • on the axis Y, the luminosity value has to vary between 0 and 100
• displays those 3 values using the text class:
  • the full hsl value in a div with the class hsl in the middle of the screen
  • the hue value in a div with the class hue in the top right corner of the screen
  • the luminosity value in a div with the class luminosity in the bottom left corner of the screen
• copies that value in the clipboard on click
• displays two SVG lines, with respective ids axisX and axisY, following the cursor like so:
  • the axisX has to set the attributes x1 and x2 to the mouse X position
  • the axisY has to set the attributes y1 and y2 to the mouse Y position

Here is how a hsl value is formatted: hsl(45, 50%, 35%)

Use Math.round() to round the values

Notions

• Copy event
• Mouse move event
• SVG: createElementNS, setAttribute
• Take a look at the HSL section

Provided files

You have at your disposal the following file that you can download to test locally:

• the HTML file index.html to open in the browser, which includes:

  • the JS script which will allow to run your code
  • some CSS pre-styled classes: feel free to use those as they are, or modify them

Expected result

You can see an example of the expected result: