During my project work, I faced a puzzling issue which can be illustrated with the following example:
Here is the sample CSS code:
*, *::after, *::before {
box-sizing: border-box;
margin: 0;
border: 0;
}
@media only screen and (max-width: 600px) {
div {
background: blue;
}
}
@media only screen and (min-width: 601px) and (max-width: 1000px) {
div {
background: green;
}
}
@media only screen and (min-width: 1001px) {
div {
background: red;
}
}
According to this code, my div should display as follows:
- blue from 0px to 600px
- green from 601px to 1000px
- red from 1001px onwards
However, the actual rendering appears differently:
- blue from 0px to 600px
- white at 601px
- green from 602px to 1000px
- white at 1001 px
- red from 1002px onwards
This discrepancy led me to believe that the (min-width:) condition is not inclusive.
In an attempt to resolve this issue, I modified the code to:
*, *::after, *::before {
box-sizing: border-box;
margin: 0;
border: 0;
}
@media only screen and (max-width: 600px) {
div {
background: blue;
}
}
@media only screen and (min-width: 600px) and (max-width: 1000px) {
div {
background: green;
}
}
@media only screen and (min-width: 1000px) {
div {
background: red;
}
}
With these adjustments, I anticipated the div's appearance to be:
- blue from 0px to 600px
- green from 601px to 1000px
- red from 1001px onwards
Unexpectedly, the outcome was:
- blue from 0px to 599px
- green from 600px to 999px
- red from 1000px onwards
This discovery suggested that the (min-width:) clause became inclusive.
Seeking further clarity, I revised the code once more:
*, *::after, *::before {
box-sizing: border-box;
margin: 0;
border: 0;
}
@media only screen and (max-width: 601px) {
div {
background: blue;
}
}
@media only screen and (min-width: 601px) and (max-width: 1001px) {
div {
background: green;
}
}
@media only screen and (min-width: 1001px) {
div {
background: red;
}
}
Surprisingly, it appeared that the (min-width:) condition was not all-inclusive yet again:
- blue from 0px to 601px
- green from 602px to 1001px
- red from 1002px onwards
These results have left me feeling confused about how the conditions are interpreted.