I have had this issue for years and I've seen similar questions before, but none of them have addressed the fact that when setting width: 100%
on an element - paddings, margins and borders will increase the width.
Have a look at this Fiddle.
The white topmost text box is a standard text box with it's width set to 100%
. As you can see it overflows it's parent because of the margin, padding and border settings.
The green text box is styled like a div using position: absolute
. This works like a dream in webkit browsers but nowhere else.
The red div is the control - I want the input to act just like that.
Are there any hacks/tricks I can employ to have my text inputs act just like the red div in all modern browsers, in other words, fit inside the padding of the parent? Please edit my Fiddle or create your own to accompany your answer. Thanks!
Set width with JavaScript With JavaScript, you can use the setAttribute() method to set the value of the size attribute on the input text box. You can also dynamically change the width of a text box to match the length of the input. We can easily do this by setting the size attribute on key events.
Use the span. text to fit width of text, and let the input have same size with it by position: absolute to the container.
You can:
input#classic { width: 100%; padding: 5px; margin: 0; -webkit-box-sizing: border-box; -moz-box-sizing: border-box; -o-box-sizing: border-box; -ms-box-sizing: border-box; box-sizing: border-box; }
JS Fiddle demo.
Note I removed the margin
, since that was causing an overflow, and set the box-sizing
to determine the width of the element including the width of the borders and padding.
Using calc
to compensate for the margin and box-sizing
for the padding
input#classic { padding: 5px; margin: 5px; width: -webkit-calc(100% - 10px); width: -moz-calc(100% - 10px); -webkit-box-sizing: border-box; -moz-box-sizing: border-box; -o-box-sizing: border-box; -ms-box-sizing: border-box; box-sizing: border-box; }
FIDDLE
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