Select width auto css

Last updated: May 17, 2023
Reading time · 4 min

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# Table of Contents

# How to set the Width of Select Options in HTML & CSS

Set the width CSS property of the select element and its option elements to set the width of a select dropdown using CSS.

If setting the property has no effect, you might have to use the !important flag.

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DOCTYPE html> html lang="en"> head> meta charset="UTF-8" /> style> select  width: 300px; > select option  width: 300px; > style> head> body> h2>bobbyhadz.comh2> select name="languages" id="language-select"> option value="">--Choose an option--option> option value="javascript">JavaScriptoption> option value="typescript">TypeScriptoption> option value="python">Pythonoption> option value="java">Javaoption> option value="php">PHPoption> option value="php"> A very long select option abc 123 option> select> body> html>

Notice that we set the width of the select element and all of its option elements to the same value — 300px.

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select  width: 300px; > select option  width: 300px; >

If setting the width has no effect in your case, you might have to use the !important flag.

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select  width: 300px !important; > select option  width: 300px !important; >

The !important flag allows you to override styles that have higher precedence.

You will most likely want to set the width of the select and its option elements to the same value.

Here is an example of setting the width of the select element and its option elements to different values.

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select  width: 150px; > select option  width: 300px; >

Setting the width of the select element to a lower value than the width of the option elements is most likely not what you want.

When a wider option is selected, its value is truncated.

Here is an example that sets the width of the select element to 300px and the width of its option elements to 150px .

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select  width: 300px; > select option  width: 150px; >

# The width of your option elements might exceed the width of your select

In some cases, you might have very wide option elements.

You can try to set the max-width CSS property on the select element but this likely won’t work.

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select  width: 300px; max-width: 300px; >

Most browsers will still want to display the entire text of the option element, so setting the width CSS property might not have an effect.

In these cases, it’s best to use JavaScript to trim the text of the option element.

Here is the HTML for the example.

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DOCTYPE html> html lang="en"> head> meta charset="UTF-8" /> style> body  margin: 100px; > select  width: 300px; > style> head> body> h2>bobbyhadz.comh2> select name="languages" id="language-select"> option value="">--Choose an option--option> option value="javascript">JavaScriptoption> option value="typescript">TypeScriptoption> option value="python">Pythonoption> option value="java">Javaoption> option value="php">PHPoption> option value="php"> bobbyhadz.com bobbyhadz.com bobbyhadz.com bobbyhadz.com bobbyhadz.com bobbyhadz.com bobbyhadz.com bobbyhadz.com bobbyhadz.com option> select> script src="index.js"> script> body> html>

And here is the code for the index.js file.

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const optionElements = document.querySelectorAll('option'); Array.from(optionElements).forEach(element =>  if (element.textContent.length > 35)  element.textContent = element.textContent.slice(0, 35) + '. '; > >);

We used the document.querySelectorAll method to select the option elements on the page.

We then converted the collection to an array using Array.from and used the Array.forEach to iterate over the array.

On each iteration, we check if the textContent of the current option element is greater than 35.

If the condition is met, we use the String.slice method to truncate the text to the first 35 characters and add an ellipsis . .

You might have to play around with the width of the select element and how many characters you want to display in your option elements depending on your use case.

# Set the Width of a Select Option in HTML & CSS using inline styles

If you weren’t able to set the width of the select element and its options using external styles, try using inline styles.

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DOCTYPE html> html lang="en"> head> meta charset="UTF-8" /> head> body> h2>bobbyhadz.comh2> select name="languages" id="language-select" style="width: 240px" > option style="width: 240px" value=""> --Choose an option-- option> option style="width: 240px" value="javascript"> JavaScript option> option style="width: 240px" value="typescript"> TypeScript option> option style="width: 240px" value="python">Pythonoption> option style="width: 240px" value="java">Javaoption> option style="width: 240px" value="php">PHPoption> option style="width: 240px" value="php"> A very long select option abc 123 option> select> body> html>

The example sets the width of the select element and its options using inline styles.

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select name="languages" id="language-select" style="width: 240px" > option style="width: 240px" value=""> --Choose an option-- option> select>

The width of both elements is set to 240px.

Inline styles have higher precedence than external stylesheets, so using this approach might work even if the previous approach didn’t work.

If none of the suggestions worked, you can try to use the !important flag which has the highest precedence.

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select  width: 300px !important; > select option  width: 300px !important; >

# Additional Resources

You can learn more about the related topics by checking out the following tutorials:

Set the Value of a Select Element using JavaScript
Set a Radio button to Checked/Unchecked using JavaScript
Get the Value/Text of Select or Dropdown on Change using JS
Show a Div when a Select option is Selected using JavaScript
Show an Element if a Checkbox is checked using JavaScript
Show/Hide an element on Radio button Selection using JS
How to put an Input element on the same line as its Label
How to fetch and display JSON data in HTML using JavaScript
Remove the outline (border) around Inputs & Links in Chrome & Firefox
Change the Background Color on Scroll using JavaScript
How to set the width and height of a Span in CSS

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Источник

Установить ширину выпадающего элемента в вариантах выпадающего списка HTML

Любые советы по этому поводу будут очень признательны.

ОТВЕТЫ

Ответ 1

Вы можете стилизовать (хотя и с некоторыми ограничениями) фактические элементы с помощью селектора option :

Таким образом вы не только сдерживаете раскрывающийся список, но и все его элементы.

Ответ 2

div.dropdown_container < width:10px; >select.my_dropdown < width:auto; >/*IE FIX */ select#my_dropdown < width:100%; >select:focus#my_dropdown

Ответ 3

// Shorten select option text if it stretches beyond max-width of select element $.each($('.shortenedSelect option'), function(key, optionElement) < var curText = $(optionElement).text(); $(this).attr('title', curText); // Tip: parseInt('350px', 10) removes the 'px' by forcing parseInt to use a base ten numbering system. var lengthToShortenTo = Math.round(parseInt($(this).parent('select').css('max-width'), 10) / 7.3); if (curText.length >lengthToShortenTo) < $(this).text('. ' + curText.substring((curText.length - lengthToShortenTo), curText.length)); >>); // Show full name in tooltip after choosing an option $('.shortenedSelect').change(function() < $(this).attr('title', ($(this).find('option:eq('+$(this).get(0).selectedIndex +')').attr('title'))); >);

Работает отлично. У меня была такая же проблема. Проверьте этот JSFiddle http://jsfiddle.net/jNWS6/426/

Ответ 4

Определить максимальную длину строки
Клип строка
(необязательно) добавить горизонтальный эллипс

Ответ 5

Ответ 6

u может просто использовать атрибут width для «style» для изменения длины раскрывающегося окна

Ответ 7

var i = 0; $("#container > option").each(function() < if($(this).val().length >i) < i = $(this).val().length; console.log(i); console.log($(this).val()); >>);

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