要創(chuàng)建HTML單選按鈕組，需使用type="radio"並共享name屬性。 1. 每個單選按鈕是獨立的<input>元素，通常配<label>以提升可用性；2. 確保同一組按鈕具有相同name值但不同id和value；3. 可通過隱藏默認(rèn)樣式並自定義標(biāo)籤外觀來美化按鈕；4. 添加checked屬性可設(shè)置默認(rèn)選項。正確實現(xiàn)後，用戶只能從一組選項中選擇一項，提升表單交互體驗。

To create radio buttons in HTML using the <input> element, you simply use the type="radio" attribute. The key is to ensure they work as a group—meaning only one can be selected at a time—which you do by giving them the same name attribute.

Basic Structure of a Radio Button

Each radio button is an individual <input> element, usually accompanied by a <label></label> for better usability. Here's a simple example:

 <input type="radio" id="option1" name="options" value="Option 1">
<label for="option1">Option 1</label>

You can repeat this pattern for each option. Just make sure all related radio buttons share the same name so they behave like a real group.

How to Make Them Work as a Group

Radio buttons are meant to let users pick only one option from a set. To achieve that:

• Use the same name value across all related inputs.
• Give each a unique id and value .
• Always pair with a <label> using the for attribute matching the id .

Example:

 <input type="radio" id="yes" name="answer" value="yes">
<label for="yes">Yes</label>

<input type="radio" id="no" name="answer" value="no">
<label for="no">No</label>

This way, when someone selects "Yes," "No" will automatically become unselected.

Styling Tips (Optional but Helpful)

While plain radio buttons work fine, sometimes you want them to look a bit different or match your site's style. You can't directly style the actual circle button much with CSS, but you can hide it and create a custom look using labels and some extra markup.

One common trick:

• Hide the default input with opacity: 0 or display: none .
• Style the label to look like a clickable button or custom radio.
• Use the :checked pseudo-class to change appearance when selected.

It takes a little more code, but it gives you full control over how the radio buttons look without breaking functionality.

Setting a Default Selection

If you want one of the options to already be selected when the page loads, just add the checked attribute to that input:

 <input type="radio" id="default" name="choice" value="Default" checked>
<label for="default">Default Option</label>

This is useful when you have a common or recommended choice and want to reduce unnecessary clicks.

That's basically how you create and manage radio buttons in HTML. It's not complicated, but getting the grouping right and making them user-friendly can make a big difference in forms and surveys.

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