英文:
How to change select option text
问题
当我为select标签设置has-empty-data=true属性时，将会添加一个空选项到选项列表中。那么如何为这个空选项标签设置文本呢？
<select name="address[province]" title="{{ 'customer.addresses.province' | t }}" has-empty-data="true" data-default="{{ form.province }}" id="provinceExist"></select>
我尝试了这样做，但仍然不起作用：
document.getElementsByName('provinceExist')[0].options[0].innerHTML = "Water";
请注意，这里使用的是JavaScript代码，用于设置空选项标签的文本。
英文:
When I set the has-empty-data=true attribute for the select tag, an empty option will be added to the list option. so how can I set the text for this empty option tag?
<select name="address[province]" title="{{ 'customer.addresses.province' | t }}" has-empty-data="true" data-default="{{ form.province }}" id="provinceExist"></select>
I tried doing this but it still doesn't work
document.getElementsByName('provinceExist').options[0].innerHTML = "Water";
答案1
得分: 1
你需要使用 getElementById 而不是 getElementByName，因为你的字段具有名为 provinceExist 的 id：
另外，你需要添加 ContentLoaded 事件来更改文本，或者你需要创建一个在事件发生时调用的函数。我已经以内容加载事件为例进行了演示。
window.addEventListener("DOMContentLoaded", () => {
document.getElementById("provinceExist").options[0].text = "Water";
});
以下是示例选择框：
<select name="address[province]" id="provinceExist">
<option>Test</option>
<option>Test1</option>
<option>Test2</option>
</select>
英文:
You need to used getElementById instead of getElementByName as your field have id called provinceExist:
Also, you need to add ContentLoaded event for change text or you need to create function to call on event happen. I have taken Content loaded event as an example.
window.addEventListener("DOMContentLoaded", () => {
document.getElementById("provinceExist").options[0].text = "Water";
});
Here example select box:
<select name="address[province]" id="provinceExist">
<option>Test</option>
<option>Test1</option>
<option>Test2</option>
</select>
答案2
得分: 0
你可以尝试使用Option对象的text属性：
document.getElementsByName('provinceExist').options[0] = new Option('Water', '');
你也可以使用innerHTML属性来设置空白选项标签的文本，就像这样：
document.getElementsByName('provinceExist').options[0].innerHTML = 'Water';
getElementsByName返回一个元素集合，所以你需要访问集合中的第一个元素才能设置innerHTML或text属性。
英文:
You can try using the text property of the Option object:
document.getElementsByName('provinceExist').options[0] = new Option('Water', '');
You can also use the innerHTML property to set the text for the empty option tag, like this:
document.getElementsByName('provinceExist').options[0].innerHTML = 'Water';
getElementsByName returns a collection of elements, so you need to access the first element in the collection to be able to set the innerHTML or text property.
答案3
得分: 0
document.getElementsByName('address[province]').options[0].innerHTML = "Water";
instead of
document.getElementsByName('provinceExist').options[0].innerHTML = "Water";
or if you want to use the id you could use
document.getElementsById('provinceExist').options[0].innerHTML = "Water";
there's also another neatway instead of having to go through all this
<select>
<option hidden disabled selected value> -- select an option -- </option>
<option>Option 1</option>
<option>Option 2</option>
<option>Option 3</option>
</select>
this will show up '-- select an option --' and once you select something this option won't no longer exist and you won't be able to select it back/view it again
英文:
document.getElementsByName('address[province]').options[0].innerHTML = "Water";
instead of
document.getElementsByName('provinceExist').options[0].innerHTML = "Water";
or if you want to use the id you could use
document.getElementsById('provinceExist').options[0].innerHTML = "Water";
there's also another neatway instead of having to go through all this
<select>
<option hidden disabled selected value> -- select an option -- </option>
<option>Option 1</option>
<option>Option 2</option>
<option>Option 3</option>
</select>
this will show up -- select an option -- and once you select something this option won't no longer exist and you won't be able to select it back/view it again
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