How to define a default value for "input type=text" without using attribute 'value'?
I need to give a default va开发者_Python百科lue for input type=text
field as follows:
<input type="text" size="32" value="" name="fee" />
There is one way to give this default value as I know:
<input type="text" size="32" value="1000" name="fee" />
Here is the question: Is it possible that I can set the default value without using attribute value
?
As I know, if I set the enter the value 1000 manually, and then view the source through web browser the value is still empty. So I think there may be a method that I can use.
You should rather use the attribute placeholder to give the default value to the text input field.
e.g.
<input type="text" size="32" placeholder="1000" name="fee" />
You can change the name
attribute by id
, and set the value property using client script after the element is created:
<input type="text" id="fee" />
<script type="text/javascript">
document.getElementById('fee').value = '1000';
</script>
Here is the question: Is it possible that I can set the default value without using attribute 'value'?
Nope: value
is the only way to set the default attribute.
Why don't you want to use it?
You can use Javascript.
For example, using jQuery:
$(':text').val('1000');
However, this won't be any different from using the value
attribute.
this is working for me
<input defaultValue="1000" type="text" />
or
let x = document.getElementById("myText").defaultValue;
A non-jQuery way would be setting the value after the document is loaded:
<input type="text" id="foo" />
<script>
document.addEventListener('DOMContentLoaded', function(event) {
document.getElementById('foo').value = 'bar';
});
</script>
The value is there. The source is not updated as the values on the form change. The source is from when the page initially loaded.
Use defaultValue
:
<input defaultValue="1000" type="text" />
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