在隐藏字段数组中添加和删除值，而无需提交表单

Question

I'm trying to manipulate the values of a hidden field, without submitting the form. The closest I found is Add and Remove values in a hidden field array

Problem I have with this is that it submits the form. In my project I'm not ready to submit the form yet. There are more questions to be asked. Here's a JSFiddle of my problem .

I feel like I'm missing something like a 'return false'.

Thanks for the help.

jQuery.fn.extend({
addToArray: function(value) {
    return this.filter(":input").val(function(i, v) {
       var arr = v.split(',');
       arr.push(value);
       return arr.join(',');
    }).end();
},
removeFromArray: function(value) {
    return this.filter(":input").val(function(i, v) {
       return $.grep(v.split(','), function(val) {  
                return val != value;
              }).join(',');
    }).end();
}
});

Answer 1

Solution is to preventdefault event.

Here's the solution:

            event.preventDefault();

http://jsfiddle.net/4kbq0veq/

Answer 2

You can add return false; in the onClick code:

<button onclick='$("#myField").addToArray("21"); return false;'>

To prevent submission.

I think you should ask a separate question, but I'm diving into this anyway. I modified the HTML in the jFiddle . Since you're using jQuery I took advantage of the click event handler. Initially I created a single handler to see what code was required. It looked like this initially:

$( "#strength" ).click(function() {
  event.preventDefault();
  if ($( '#goals' ).val().indexOf(',strength') >= 0) {
    $( '#goals' ).val($( '#goals' ).val().replace(',strength', ''));
    $( this ).removeClass('button');
    $( this ).addClass('buttonSelected');
  } else {
    $( '#goals' ).val($( '#goals' ).val() + ',strength');
    $( this ).removeClass('buttonSelected');
    $( this ).addClass('button');
  }
});

That was an okay starting point to figure out the required code. However I didn't want to repeat that code for each of the buttons. So I factored out the code that I knew could be reused for the other buttons. So it looked like this:

$( "#strength" ).click(function() {
  event.preventDefault();
  toggle(',strength', this);
});

function toggle(str, thisObj) {
  if ($( '#goals' ).val().indexOf(str) >= 0) {
    console.log(str + ' is already selected');
    $( '#goals' ).val($( '#goals' ).val().replace(str, ''));
    $( thisObj ).removeClass('buttonSelected');
    $( thisObj ).addClass('button');
  } else {
    console.log(str + ' is about to be selected');
    $( '#goals' ).val($( '#goals' ).val() + str);
    $( thisObj ).removeClass('button');
    $( thisObj ).addClass('buttonSelected');
  }
}

Then it is pretty straightforward to handle the additional buttons with some repetitive code:

$( "#weight" ).click(function() {
    event.preventDefault();
  toggle(',weight', this);
});

$( "#tone" ).click(function() {
    event.preventDefault();
  toggle(',tone', this);
});

You may be able to decrease the repetition, but I'm tired and hungry. Hope this helps you out!