CODEWITHSUNDEEP
javascriptjqueryhtmlslider
Umer Waheed
Umer Waheed

Reputation: 4574

How to change HTML range slider value with button?

I am using a HTML range slider to zoom in and zoom out an image. I also want to show two buttons with slider like + for zoom and − for zoom out. When a user clicks on either of these buttons, the slider should also be moved. But I am unable to do this. Here is my code.

<div id="slider">
    <input id="slide" type="range" min="330" max="1200" step="30" value="330" onchange="ImageViewer.sliderAction(this.value)" />
</div>

Here is my function:

var sliderAction = function (value) {
    $sliderChosen.html(value);
    $("#img").width(value);
    $("#img").height(value);
};

When I click the button, I tried this:

btnZoomIn.click(function() {
    $("#slide").value();  //Want to change value but value is undefined.
});

Is there any way to change slider value and move it as well on button click?

Upvotes: 6

Views: 19381

Answers (2)

Milind Anantwar
Milind Anantwar

Reputation: 82231

You can use callback function of .val() and then trigger onchange event:

var sliderelement = $( "#slide" );
btnZoomIn.click(function() {
 sliderelement.val(function( index, value ) {
     return parseInt(value,10) + 30;
 });
 sliderelement[0].onchange()
});

Upvotes: 1

madalinivascu
madalinivascu

Reputation: 32354

use val()

 btnZoomIn.click(function() {
               //if value < max
               $("#slide").val(parseInt($("#slide").val())+30);  
               $("#slide").trigger('change');
            });

https://jsfiddle.net/9jfst447/

Upvotes: 11

Related Questions