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Dynamically set value of a file input
I have an input file HTML form and I want to set the initial value for the file path in an HTML form . I try to change tag "value" but it doesn't work anyway. <input type="file" name="testcase" value= "C:\test.txt">
Please give me some advice for this small problem. Thanks.
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The only way to set the value of a file input is by the user to select a file. This is done for security reasons. Otherwise you would be able to create a JavaScript that automatically uploads a specific file from the client's computer.
A file input's value attribute contains a string that represents the path to the selected file(s). If no file is selected yet, the value is an empty string ( "" ). When the user selected multiple files, the value represents the first file in the list of files they selected.
When present, it specifies that the user is allowed to enter more than one value in the <input> element. Note: The multiple attribute works with the following input types: email, and file. Tip: For <input type="file"> : To select multiple files, hold down the CTRL or SHIFT key while selecting.
To reset a file input in React, set the input's value to null in your handleChange function, e.g. event. target. value = null . Setting the element's value property to null resets the file input.
From HTMLHelp.com :
The file input type creates a field through which users can upload files from their local computer or network. The VALUE attribute specifies the name of the initial file, but it is typically ignored by browsers as a security precaution.
Therefore, setting an initial value is not supported.
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