If width of parent element is less than 500px set children width to auto?

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I have some spans laid out inside of div whose width is set to 100%, each span has styling on it to give it 500px width.

So like this:

<div>
<span style="width=500px">child span</span><span style="width=500px">child span</span><span style="width=500px">child span</span><span style="width=500px">child span</span>
</div>

When the width of the parent div goes below 1000px I'd like the spans to now have their width set to 100%

<div>
<span style="width=parent.Width < 1000px ? auto : 500px">child span</span><span style="width=parent.Width < 1000px ? 100%: 500px">child span</span><span style="width=parent.Width < 1000px ? 100% : 500px">child span</span><span style="width=parent.Width < 1000px ? 100% : 500px">child span</span><span style="width=parent.Width < 1000px ? 100% : 500px">child span</span>
</div>

Try this:

div {
  width: 100%;
  outline: 1px solid red;/*remove this. it is only for visualisation*/
}

div span {
  max-width: 500px;
  width: 100%;
  display: inline-block;
}
<div>
  <span>child span</span><span>child span</span><span>child span</span><span>child span</span></div>

How to make a parent div auto size to the width of its children divs , What type of elements take up the full width available based on the width of their parent element? /* Add responsiveness - on screens less than 500px, make the navigation links appear on top of each other, instead of next to each other */ @media screen and (max-width: 500px) { display: block; text-align: left; /* If you want the text to be left-aligned on small screens */ Try it Yourself » Equal Width Navigation Links with Icons.

You will need to make use of @media(max-width) here. And remember span width by default is auto. So you need to add display styling too.

span {
  display: inline-block;
  width: 500px;
}

@media(max-width:1000px) {
  span {
    display: inline;
    width: 100%;
  }
}
<div>
  <span>child span</span>
  <span>child span</span>
  <span>child span</span>
  <span>child span</span>
</div>

Where is the default size of a div element defined or calculated , (stretches out to the left and right as far as it can). Then I need customize that layout to make all A tags auto fit to the parent width. But the number of children is variable and the parent's width isn't known (it auto fits itself to the window). But the number of children is variable and the parent's width isn't known (it auto fits itself to the window).

Try media queries!

Reference: https://www.w3schools.com/css/css_rwd_mediaqueries.asp

span {
  display: inline-block;
  width: 500px;
}

@media screen and (max-width:1000px) {
  span {
    display: block;
    width: 100%;
  }
}
<div>
  <span>child span</span>
  <span>child span</span>
  <span>child span</span>
  <span>child span</span>
</div>

How can I let a div automatically set it own width?, How do you make a child DIV the same width as a parent? We set the width of the child element to fill the entire viewport width, then we make it meet the edge of the screen by moving it to the left by a distance of half the viewport, minus 50% of the parent element's width. Demo:

value of 8px is expected to be used for the margin. You have a div container and a child element. The child div has a width of 400px but the parent has no width declared. Again, if you add a border, it can happen that the parent div is expanded to 100% while the child div is only 400px. You however may want it to be as wide as the child element – 400px (plus any paddings or margins declared).

The width property in CSS specifies the width of the element's If your parent is set at 480px – as demonstrated by our demo – then the Because the caption is very longer than the image is wide (it doesn't margin-right: auto in behaviour, except it works for unknown widths. :checked · Child · Class. The width property sets the width of an element. The width of an element does not include padding, borders, or margins! Note: The min-width and max-width properties override the width property. yes. Read about animatable Try it. JavaScript syntax: object .style.width="500px" Try it. Browser Support. The numbers in the table specify the first

This image is 100% wide as it's limited-width parent. If we could use absolute positioning, we could set the container to be at Under most other circumstances, we just don't have enough margin: 0 auto; } .full-width { margin-​left: calc(-100vw / 2 + 500px / 2); margin-right: calc(-100vw / 2 + 500px / 2); } }. The element will take up the specified width, and the remaining space will be split equally between the two margins: This <div> element has a width of 500px, and margin set to auto. Note: The problem with the <div> above occurs when the browser window is smaller than the width of the element.

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