I'm painting HTML%% of PHP and I need to handle it with JavaScript.
html.php
<p id="elem" value=" <?php echo $_SESSION['variable']; ?> "></p>
The result of this operation is:
<p id="elem" value="0"></p>
For the time being, it is the expected result.
The problem is that when wanting to handle the new $_SESSION['variable'] with JavaScript, it returns an error value="0" .
javascript.js
console.log(elem.value);
>> undefined
If your intention is to call that attribute, do it: elem.getAttribute ("value");
But under when you create control, if you do it before the control is rendered it will still give undefined
EDIT: I keep my answer, for either of the two cases.
First of all, remember that PHP runs On server and Javascript On client . Taking this into account and the natural process of a 'rendering of the pages' we can see that (in a very very shallow way) PHP - > HTML - > Javascript
Therefore, every time you prepare your <?php echo $_SESSION['variable']; , this already comes to the ready and ready browser, so that you can now execute your Javascript code.
Following your example, I have <p id="elem" value="0"></p> , so, to capture that use value (using Jquery)
$(function () {
var valueQueNecesito = $('#elem').val();
console.log(valueQueNecesito);
});
Javascript (pretty basic)
var value = document.getElementById(elem).value;
greetings