What is the best way to access the background-position-y property in Firefox utilizing jQuery?

Question

What is the best way to access the background-position-y property in Firefox utilizing jQuery?

$(elem).css('backgroundPositionY')

Works on Chrome, IE, and Safari, but not on Firefox (or Opera, if I'm not mistaken). It's surprising that jQuery doesn't have a polyfill for this as of version 1.5. How can I easily obtain the background Y position for use in animations like parallax scrolling?

UPDATE: Let Mozilla know that you would like to see support for background-position-[x,y]. Use the "vote" feature instead of commenting unless you have valuable insights to add. The bug has been open since 2010 (3 years now), so don't expect a quick solution. :)

javascript jquery css firefox

Answer 1

Answer №1

let backgroundPosition = $(elem).css('backgroundPosition').split(" ");
// The array now holds values like ["0%", "50px"]

let xPosition = backgroundPosition[0],
    yPosition = backgroundPosition[1];

Answer 2

let backgroundPosition = $(elem).css('backgroundPosition').split(" ");
// The array now holds values like ["0%", "50px"]

let xPosition = backgroundPosition[0],
    yPosition = backgroundPosition[1];

Answer 3

Answer №2

Here is a simple way to extract background position value using JavaScript:

const $bgElement = document.querySelector('#bgElement');
const bgPosition = getComputedStyle($bgElement).backgroundPosition;
// Example: bgPosition = "50% 75%"
const values = bgPosition.split(' '); // ["50%", "75%"]
const yValue = parseInt(values[1]); 

// Alternatively, you can get the float value:
const yFloatValue = parseFloat(values[1]);

In this code snippet, yValue will give you the number representing the vertical offset in pixels or percentage based on your needs. By using a simple regex method, we removed any non-numeric characters from the extracted value.

Answer 4

Here is a simple way to extract background position value using JavaScript:

const $bgElement = document.querySelector('#bgElement');
const bgPosition = getComputedStyle($bgElement).backgroundPosition;
// Example: bgPosition = "50% 75%"
const values = bgPosition.split(' '); // ["50%", "75%"]
const yValue = parseInt(values[1]); 

// Alternatively, you can get the float value:
const yFloatValue = parseFloat(values[1]);

In this code snippet, yValue will give you the number representing the vertical offset in pixels or percentage based on your needs. By using a simple regex method, we removed any non-numeric characters from the extracted value.

Answer 5

Answer №3

Some browsers like Chrome display css('background-position') or css('backgroundPosition') in the format of left <x> top <y>, while others such as Internet Explorer, Firefox, and Opera show it as <x> <y>. Here's a solution that worked for me:

var x, y, pos = $(elem).css('background-position').split(' ');

if(pos[0] === 'left') {
  x = pos[1];
  y = pos[3];
} else {
  x = pos[0];
  y = pos[1];     
}

Answer 6

Some browsers like Chrome display css('background-position') or css('backgroundPosition') in the format of left <x> top <y>, while others such as Internet Explorer, Firefox, and Opera show it as <x> <y>. Here's a solution that worked for me:

var x, y, pos = $(elem).css('background-position').split(' ');

if(pos[0] === 'left') {
  x = pos[1];
  y = pos[3];
} else {
  x = pos[0];
  y = pos[1];     
}

Answer 7

Answer №4

Expanding on the idea presented by sequoia mcdowell, another option is to use the following code snippet:

let yPos = $(elem).css('backgroundPositionY');

Answer 8

Expanding on the idea presented by sequoia mcdowell, another option is to use the following code snippet:

let yPos = $(elem).css('backgroundPositionY');

What is the best way to access the background-position-y property in Firefox utilizing jQuery?

Answer №1

Answer №2

Answer №3

Answer №4

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