Process a Form Submit with Multiple Submit Buttons in Javascript

Question

I have a form with multiple submit buttons, and I'd like to capture when any of them are pressed, and perform different JS code for each one.

<form id="my-form">
    <input type="email" name="email" placeholder="(Your email)" />
    <button type="submit" value="button-one">Go - One</button>
    <button type="submit" value="button-two">Go - Two</button>
    <button type="submit" value="button-three">Go - Three</button>
</form>

Looking at an older answer, I can process all of the submit buttons in JS:

function processForm(e) {
    if (e.preventDefault) e.preventDefault();

    /* do what you want with the form */

    // You must return false to prevent the default form behavior
    return false;
}

var form = document.getElementById('my-form');
if (form.attachEvent) {
    form.attachEvent("submit", processForm);
} else {
    form.addEventListener("submit", processForm);
}

But how can I discriminate amongst the different submit buttons? Is there a way to get the value and perform logic from there?

I don't need to have three submit buttons, per se... I just need three different buttons in a form to perform three different actions.

Thanks!

Answer 1

use this

function processForm(e) {
if (e.preventDefault) e.preventDefault();
/* do what you want with the form */
var submit_type = document.getElementById('my-form').getAttribute("value");
if(submit_type=="button-one"){

}//and so on
// You must return false to prevent the default form behavior
return false;
}

Answer 2

HTML:

<form id = "form" onSubmit = {handleSubmit}>
<input type="email" name="email" placeholder="(Your email)" />
<button type="submit" value="button-one">Go - One</button>
<button type="submit" value="button-two">Go - Two</button>
<button type="submit" value="button-three">Go - Three</button>
</form>

JS:

const handleSubmit = e => {
    e.preventDefault();

    var ans = document.activeElement['value'];
    console.log(ans);
};

Answer 3

you can attach a custom click handler to all buttons, and that way you can check which button is clicked before submitting the form:

Live Example

$("#my-form button").click(function(ev){
    ev.preventDefault()// cancel form submission
    if($(this).attr("value")=="button-one"){
        //do button 1 thing
    }
    // $("#my-form").submit(); if you want to submit the form
});