Javascript HTML 范围:动态设置值属性
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HTML range: set value attribute dynamically
提问by user1639762
Good evening!!
晚上好!!
I'm using HTML input type range to create a slidebar. I would like to dynamically change the attribute "value" (default position of the cursor) before displaying the slidebar.
我正在使用 HTML 输入类型范围来创建滑动条。我想在显示滑动条之前动态更改属性“值”(光标的默认位置)。
I can retrieve the value I need (from localStorage) but I don't manage to set it!!
我可以检索我需要的值(从 localStorage),但我无法设置它!!
Here is the range object:
这是范围对象:
<input type="range" min="0" max="1050" value="0" step="30" onchange="showValue(this.value); changeScrollBar(this.value);"/>
Now it is set to 0 but I would like to use a variable to change it (i.e I'll set a new variable foo=localStorage.getItem("foo2") then I would like to use value=foo in range)!
现在它被设置为 0 但我想使用一个变量来改变它(即我将设置一个新变量 foo=localStorage.getItem("foo2") 然后我想在范围内使用 value=foo)!
Any clue?
有什么线索吗?
Thanks a lot!!!
非常感谢!!!
回答by jfriend00
You get the DOM element for the <input>
tag and then use:
您获取<input>
标签的 DOM 元素,然后使用:
elem.value = foo;
If you add an ID to the input tag like this:
如果您将 ID 添加到输入标签,如下所示:
<input id="mySlider" type="range" min="0" max="1050" value="0" step="30" onchange="showValue(this.value); changeScrollBar(this.value);"/>
Then, you can do the whole thing like this:
然后,你可以像这样完成整个事情:
var input = document.getElementById("mySlider");
input.value = localStorage.getItem("foo2");