Omit the value attribute from select options with no value #3773
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In HTML, if you omit the `value` attribute from an `<option>`the value defaults to the text contained inside the element [1]. However if you omit the value from an option when using the `govukSelect` macro, we currently include an empty value attribute on the `<option>` element. This would mean that when submitting a form using a select with options with no value set, the value submitted would be the empty string. Instead, omit the `value` attribute if no `value` option has been provided. We then mimic the default HTML behaviour, as the option value will then naturally fall back to the text content. We still need to ensure that the `value` attribute is included when the value option is passed but has a falsey value (like an empty string, 0, or boolean false). Fixes #3440. [1]: https://html.spec.whatwg.org/multipage/form-elements.html#the-option-element:~:text=The%20value%20attribute%20provides%20a%20value%20for%20element.%20The%20value%20of%20an%20option%20element%20is%20the%20value%20of%20the%20value%20content%20attribute%2C%20if%20there%20is%20one%2C%20or%2C%20if%20there%20is%20not%2C%20the%20value%20of%20the%20element%27s%20text%20IDL%20attribute.
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| const $firstItem = $('.govuk-select option:first-child') | ||
| // Ideally we'd test for $firstItem.attr('value') == undefined but it's | ||
| // broken in Cheerio – https://github.com/cheeriojs/cheerio/issues/3237 |
| it('selects options with implicit value using selected value', () => { | ||
| const $ = render('select', examples['without values with selected value']) | ||
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| const $selectedItem = $('option:contains(\'Green\')') |
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ESLint should be happy with double quotes when they're intentionally nesting single quotes if you like
Suggested change
| const $selectedItem = $('option:contains(\'Green\')') | |
| const $selectedItem = $("option:contains('Green')") |
colinrotherham
approved these changes
Jun 9, 2023
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@36degrees Do we need a CHANGELOG entry for this should anyone rely on the old behaviour? |
Allow the top-level `value` option on a `govukSelect` to work with options that have no explicit value set. The value of an option element when there is no `value` attribute is the text content of the element, so use that instead.
36degrees
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D'oh! I'd added it but not pushed. Have applied your suggestion and updated. |
colinrotherham
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Jun 9, 2023
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Omit the value attribute from select options with no value
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In HTML, if you omit the
valueattribute from an<option>the value defaults to the text contained inside the element.However if you omit the value from an option when using the
govukSelectmacro, we currently include an emptyvalueattribute on the<option>element. This would mean that when submitting a form using a select with options with no value set, the value submitted would be the empty string.Instead, omit the
valueattribute if no value option has been provided. We then mimic the default HTML behaviour, as the option value will then naturally fall back to the text content.We still need to ensure that the
valueattribute is included when the value option is passed but has a falsey value (like an empty string, 0, or boolean false).Also allow the top-level
valueoption on agovukSelectto work with options that have no explicit value set by comparing it to the text content instead.Fixes #3440.