Load a file automatically without using a click button

Question

I am new to javascript and want to load the file without having to click on the load file button

I am using the following script and I want the text to be loaded aut

Answer 1

Respond to the document's ready event:

$(document).ready( loadFileAsText );

If you don't want to use jQuery for simple compatibility with multiple browsers, then see this answer: pure JavaScript equivalent to jQuery's $.ready() how to call a function when the page/dom is ready for it

Answer 2

You can just call the function on it's own like this:

loadFileAsText();

Answer 3

Try adding the onchange attribute, this will call functions when changes have been made to that input.

<input type="file" id="fileToLoad" onchange="loadFileAsText()">

Demo

function loadFileAsText(){
var fileToLoad = document.getElementById("fileToLoad").files[0];
var fileReader = new FileReader();
    fileReader.onload = function(fileLoadedEvent){ 
        document.getElementById("inputTextToSave").value = fileLoadedEvent.target.result;
    };
fileReader.readAsText(fileToLoad, "UTF-8");
}

<table><tr>
<td>Select a File to Load:</td>
<td><input type="file" id="fileToLoad" onchange="loadFileAsText()"></td>
                                 <!-- ^^ onchange attribute added ^^ -->
</tr><tr>
<td colspan="2"><textarea id="inputTextToSave" style="width:512px;height:256px"></textarea></td>
</tr></table>

If you have any questions about the above source code please leave a comment below and I will get back to you as soon as possible.

I hope this helps. Happy coding!

Answer 4

You can do it using Javascript events. for ex: you can call like below:

<input type="file" id="fileToLoad" onblur="loadFileAsText()">