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      2. 使用 javascript 检查单选按钮

        时间:2023-10-21

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                  本文介绍了使用 javascript 检查单选按钮的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  由于某种原因,我似乎无法弄清楚这一点.

                  For some reason, I can't seem to figure this out.

                  我的 html 中有一些单选按钮可以切换类别:

                  I have some radio buttons in my html which toggles categories:

                  <input type="radio" name="main-categories" id="_1234" value="1234" /> // All
                  <input type="radio" name="main-categories" id="_2345" value="2345" /> // Certain category
                  <input type="radio" name="main-categories" id="_3456" value="3456" /> // Certain category
                  <input type="radio" name="main-categories" id="_4567" value="4567" /> // Certain category
                  

                  用户可以选择任何他/她想要的,但是当某个事件触发时,我想设置 1234 设置为选中单选按钮,因为这是默认选中单选按钮.

                  The user can select whichever he/she wants, but when an certain event triggers, I want to set 1234 to be set checked radio button, because this is the default checked radio button.

                  我已经尝试过这个版本(有和没有 jQuery):

                  I have tried versions of this (with and without jQuery):

                  document.getElementById('#_1234').checked = true;

                  但它似乎没有更新.我需要它明显更新,以便用户可以看到它.有人可以帮忙吗?

                  But it doesn't seem to update. I need it to visibly update so the user can see it. Can anybody help?

                  我只是累了,忽略了 #,感谢您指出它和 $.prop().

                  I'm just tired and overlooked the #, thanks for pointing it out, that and $.prop().

                  推荐答案

                  不要将 CSS/JQuery 语法(# 表示标识符)与原生 JS 混合.

                  Do not mix CSS/JQuery syntax (# for identifier) with native JS.

                  原生 JS 解决方案:

                  document.getElementById("_1234").checked = true;

                  jQuery 解决方案:

                  $("#_1234").prop("checked", true);

                  这篇关于使用 javascript 检查单选按钮的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

                  上一篇:为选中的单选按钮分配一个初始值 下一篇:为什么单选按钮不能“只读"?

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