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CSS left Property

The left property affects the horizontal position of a positioned element. It has no effect on non-positioned elements.

CSS Demo: left

left: 0;
left: 30px;
left: -25px;
left: 5em;
left: 100%;
I am absolutely positioned

The effect of left depends on how the element is positioned (i.e., the value of the position property):

  • if position: absolute; or position: fixed; - the left property specifies the distance between the element's left edge and the left edge of its containing block.
  • if position: relative; - the left property specifies the distance the element's left edge is moved to the right from its normal position.
  • if position: sticky; - the left property behaves like its position is relative when the element is inside the viewport, and like its position is fixed when it is outside.
  • if position: static; - the left property has no effect.

When both left and right are defined, the position of the element is overspecified. When this is the case, the left value has precedence when the container is left-to-right, the right value has precedence when the container is right-to-left.

Technical Details

Default value auto
Applies to positioned elements
Inherited no
Computed value as specified
Animatable yes See animatable properties. Demo
Version CSS2
JavaScript syntax object.style.left = "50vw" Demo

CSS Syntax:

left: auto|length|initial|inherit;


The following example shows how to use left property:

Run code

Browser compatibility

The numbers in the table specify the first browser version that fully supports the left property:

left 1 1 6 1 5

Property Values

The following table describes the values of left property:

Value Description
auto The browser calculates the left edge position (This is default)
length Sets the left edge position in length. Negative values are allowed See length units
initial Sets this property to its default value
inherit Inherits this property from its parent element

See also

CSS Positioned Element tutorial

CSS position property

CSS top property

CSS bottom property

CSS right property