当数据分配给输入文本框时,输入文本框onchange不会触发 [英] Input textbox onchange is not firing when data is assigned to input textbox
问题描述
这是我的HTML网页
< script>
函数set()
{
document.getElementById(txt)。value ++;
}
< / script>
< input id =txttype =textonchange =javascript:alert('txt changed');值= 0 >
< br />
< input type =buttononclick =set()value =设置数据/>
当我按下按钮时,文本框的值正在改变,onchange事件不会触发,
,但是当我在文本框中手动输入值时,它会触发onchange。
我只需要在数据更改时调用JavaScript函数点击一个按钮的文本框。
您能帮忙吗?
通过代码更改值后,您可以使用 document.getElementById(txt)。onchange();
从代码中触发onchange
UPDATE
更改您的设置功能以获取文本框的ID
函数集(textboxid)
{
var tb = document.getElementById(textboxid);
tb.value ++;
tb.onchange();
}
This is my HTML page
<script>
function set()
{
document.getElementById("txt").value++;
}
</script>
<input id="txt" type="text" onchange="javascript:alert('txt changed');" value="0">
<br/>
<input type="button" onclick="set()" value="Set Data"/>
When I press the button, the text box value is changing, and the onchange event is not firing, but when I enter value manually in the textbox, it is firing the onchange.
All I want is to call a JavaScript function when data is changed in the textbox when a button is clicked.
Can you help?
you can fire onchange from code using document.getElementById("txt").onchange();
after the changing the value through code
UPDATE
change your set function to take the id of the text box
function set(textboxid)
{
var tb = document.getElementById(textboxid);
tb.value++;
tb.onchange();
}
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