如何将 javascript 变量分配给输入文本字段？
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How to assign a javascript variable to input text field?
提问by ZAD
I've a variable called "numbers" in javascript and this variables holds 10 numbers from 0 to 9 as shown below.
我在 javascript 中有一个名为“numbers”的变量，这个变量包含从 0 到 9 的 10 个数字，如下所示。
var numbers = "0123456789";
Now what I want to be able to do is assigning each of these numbers to an input text field using document.getElementByID("a") = "";, for example:
现在我想要做的是使用 document.getElementByID("a") = ""; 将这些数字中的每一个分配给输入文本字段，例如：
<input type="text" id="a" value="" />
<input type="text" id="b" value="" />
<input type="text" id="c" value="" />
<input type="text" id="d" value="" />
<input type="text" id="e" value="" />
<input type="text" id="f" value="" />
<input type="text" id="g" value="" />
<input type="text" id="h" value="" />
<input type="text" id="i" value="" />
<input type="text" id="j" value="" />
Currently the following text fields above holding no values, but I want to be able to assign each of the numbers in variable "numbers" to each of the text fields above, so it would looks like this when user clicks on a button called click me.
目前上面的以下文本字段没有值，但我希望能够将变量“numbers”中的每个数字分配给上面的每个文本字段，因此当用户单击名为 click me 的按钮时，它看起来像这样.
<input type="text" id="a" value="0" />
<input type="text" id="b" value="1" />
<input type="text" id="c" value="2" />
<input type="text" id="d" value="3" />
<input type="text" id="e" value="4" />
<input type="text" id="f" value="5" />
<input type="text" id="g" value="6" />
<input type="text" id="h" value="7" />
<input type="text" id="i" value="8" />
<input type="text" id="j" value="9" />
Also is there any way to leave a text field empty if a particular number is = 0
如果特定数字 = 0，还有什么方法可以将文本字段留空
Thanks in advance :)
提前致谢 ：）
回答by mellamokb
var numbers = "0123456789";
var ids = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"];
for (var i = 0; i < ids.length; i++)
{
var el = document.getElementById(ids[i]);
var num = numbers[i];
if (num == "0")
el.value = "";
else
el.value = num;
}
Working sample: http://jsfiddle.net/LrJ5S/.
工作示例：http: //jsfiddle.net/LrJ5S/。
回答by rsplak
In addition to mellamokb, another way of accomplishing the same:
除了 mellamokb，还有另一种实现方式：
var numbers = "abc0123abc0123";
var inputs = document.getElementsByTagName('input');
var i = 0;
for(var s = 0; s < inputs.length; s++) {
inputs[s].value = numbers.charAt(i)!=0?numbers.charAt(i):'';
i++;
}
回答by epascarello
Basic example with no checks on data size of inputs and string:
不检查输入和字符串的数据大小的基本示例：
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title></title>
</head>
<body>
<div id="myInputs">
<input type="text" id="a" value="" />
<input type="text" id="b" value="" />
<input type="text" id="c" value="" />
<input type="text" id="d" value="" />
<input type="text" id="e" value="" />
<input type="text" id="f" value="" />
<input type="text" id="g" value="" />
<input type="text" id="h" value="" />
<input type="text" id="i" value="" />
<input type="text" id="j" value="" />
</div>
<button id="run">Run</button>
<script type="text/javascript">
function putNumbers(){
var numbers = "0123456789";
var inputs = document.getElementById("myInputs").getElementsByTagName("input");
for(var i=0;i<inputs.length;i++){
var val = numbers.charAt(i);
inputs[i].value = val==="0"?"":val;
}
}
document.getElementById("run").onclick = putNumbers;
</script>
</body>
</html>
