What is the best way to allow the user to select other images?

Part 1: what is the commonly accepted practice to include images in web pages? The insertion/img tag is still the accepted practice, or it makes more use divs with background images?

Part 2: I want to offer the user the option of images display normally, with inverted colours (as edited by Photoshop) images or no images at all? Here's my idea please tell me if there is a better way. The scenario is a simple tutorial with screenshots, in most cases it will take only one page. The reason is I often follow tutorials like this one, but due to vision problems, I use a Windows high contrast theme. The screenshots seem to be like BLOBs all very bright, white. I would like to create tutorials for others who also use high contrast.

  1. Have the options at the top of the unique links page or a drop down
  2. This defines a variable
  3. In IF statements, wrapping the tag img or divs.

Seems simple enough. But for the value of the variable is taken into account, that it requires a reload of the page? It seems that the page loads first using the default setting. If so, is there anyway to do this without a reload?

If it happens that the tutorial extend to more than one page, it would be preferable to write the variable as a variable session, the database entry, a cookie or text file?

Is it possible to invert the colors of the image without using a separate image? Most of the browsers detect the Windows theme and follow along. They have used to also reverse the images, but pixel-by-pixel - made what appeared to be the mathematical inverse of each pixel. Now, browsers just leave images alone (as well they should). And now that think, they can also ignore any element background and just make the black color instead of any background color or image.

Thank you!

1. it depends on what you do, generally with the help of the tag is still a common practice ( and srcset are also available, which gives much more control who sees what, but does not have 100% support yet). Place an image into a background css is typically used if you are going to place the text or other content on the image or make some kind of special effects using css.

2. you can use some relatively simple css to change all images on your site in versions reversed using filter:invert ()...

https://davidwalsh.name/invert-colors-CSS

It does not work in any version of Internet Explorer, but Edge is supported. IE uses a css filter called owner snip: xray that before setting the other setting in your css should take care of the issue, however.

https://davidwalsh.name/CSS-image-filters-Internet-Explorer

Tags: Dreamweaver

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