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CSS

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Align Self

The align-self property allows you to override the align-items property for a single flex item. It controls the alignment of an individual item along the cross axis of the flex container.

Example 1: align-self: center

.flex-container {
  display: flex;
  height: 200px;
  align-items: flex-start; /* All items are aligned to the top by default */
  border: 1px solid #000;
}

.flex-item {
  width: 100px;
  background-color: moccasin;
  border: 1px solid #000;
}

.center-me {
  align-self: center; /* This item is centered on the cross-axis */
}

Explanation

While the container has align-items: flex-start, the .center-me item is vertically centered because align-self: center overrides the container's alignment property.

Example 2: align-self: flex-end

.flex-container {
  display: flex;
  height: 200px;
  align-items: center; /* All items are centered by default */
  border: 1px solid #000;
}

.flex-item {
  width: 100px;
  background-color: navajowhite;
  border: 1px solid #000;
}

.end-me {
  align-self: flex-end; /* This item is aligned to the bottom */
}

Explanation

In this case, the .end-me item is aligned to the end of the cross axis (the bottom), even though the other items are centered according to the align-items property of the container.

Example 3: align-self: flex-start

.flex-container {
  display: flex;
  height: 200px;
  align-items: center;
  border: 1px solid #000;
}

.flex-item {
  width: 100px;
  background-color: peachpuff;
  border: 1px solid #000;
}

.start-me {
  align-self: flex-start; /* This item is aligned to the top */
}

Explanation

The .start-me item is aligned to the start of the cross axis (the top), overriding the align-items: center set on the flex container.

Example 4: align-self: stretch

.flex-container {
  display: flex;
  height: 200px;
  align-items: flex-start; /* Items don't stretch by default */
  border: 1px solid #000;
}

.flex-item {
  width: 100px;
  background-color: papayawhip;
  border: 1px solid #000;
}

.stretch-me {
  align-self: stretch; /* This item stretches to fill the container's height */
}

Explanation

align-self: stretch causes the .stretch-me item to stretch to fill the height of the flex container, ignoring the align-items: flex-start property. This is the default align-items behavior if no height is set on the item.

Example 5: align-self: baseline

.flex-container {
  display: flex;
  height: 200px;
  align-items: flex-start;
  border: 1px solid #000;
}

.flex-item {
  width: 100px;
  background-color: mistyrose;
  border: 1px solid #000;
}

.baseline-me {
  font-size: 2em;
  align-self: baseline; /* Aligns based on the text baseline */
}

Explanation

The .baseline-me item is aligned with the other items based on their text's baseline. This is useful for aligning items that have different font sizes.

Example 6: auto value

.flex-container {
  display: flex;
  height: 200px;
  align-items: center;
  border: 1px solid #000;
}

.flex-item {
  width: 100px;
  background-color: oldlace;
  border: 1px solid #000;
  align-self: auto; /* Inherits the align-items value from the container */
}

Explanation

The auto value for align-self is the default, and it simply inherits the align-items value from the parent flex container. In this case, the item will be centered.

Example 7: Using with different flex-direction

.flex-container {
  display: flex;
  height: 200px;
  flex-direction: column; /* Main axis is now vertical */
  align-items: center; /* Aligns items horizontally */
  border: 1px solid #000;
}

.flex-item {
  height: 50px;
  background-color: linen;
  border: 1px solid #000;
}

.align-me {
  align-self: flex-end; /* Aligns the item to the right edge */
}

Explanation

When flex-direction is column, the cross axis becomes horizontal. align-self: flex-end will therefore align the .align-me item to the right edge of the container.