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css-flexbox.md

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CSS flexbox
CSS
 
.container {
  display: flex;
}

.container.vertical {
  flex-direction: column;
}

.container > div {
  flex: /* grow, shrink, basis */;
  flex: 0 0 40px; /* fixed width */
  flex: 0 1 auto; /* dynamic width */

  order: 1;
}

Full reference

.container {
  display: flex;
  display: inline-flex;

  flex-direction: row;            /* ltr - default */
  flex-direction: row-reverse;    /* rtl */
  flex-direction: column;         /* top-bottom */
  flex-direction: column-reverse; /* bottom-top */

  flex-wrap: nowrap; /* one-line */
  flex-wrap: wrap;   /* multi-line */

  align-items: flex-start; /* vertical-align to top */
  align-items: flex-end;   /* vertical-align to bottom */
  align-items: center;     /* vertical-align to center */
  align-items: stretch;    /* same height on all (default) */

  justify-content: flex-start; /* horizontal alignment - default */
  justify-content: flex-end;
  justify-content: center;
}

.container > div {
  flex: 1 0 0;
  order: 1;
  flex-grow: 0;

  align-self: flex-start;  /* left */
  margin-left: auto;       /* right */
}

Tricks

Vertical center

.container {
  display: flex;
}

.container > div {
  width: 100px;
  height: 100px;
  margin: auto;
}

Vertical center (2)

.container {
  display: flex;
  align-items: center;     /* vertical */
  justify-content: center; /* horizontal */
}

Reordering

.container > .top {
 order: 1;
}

.container > .bottom {
 order: 2;
}

Mobile layout

A fixed-heighttop bar and a dynamic-height content area.

.container {
  display: flex;
  flex-direction: column;
}

.container > .top {
  flex: 0 0 100px;
}

.container > .content {
  height: 100px;
  flex: 1 0 auto;
}

Table-like

This creates columns that have different widths, but size accordingly according to the circumstances.

.container {
  display: flex;
}

/* the 'px' values here are just suggested percentages */
.container > .checkbox { flex: 1 0 20px; }
.container > .subject  { flex: 1 0 400px; }
.container > .date     { flex: 1 0 120px; }

Vertical

Vertically-center all items.

.container {
  align-items: center;
}

Left and right

.menu > .left  { align-self: flex-start; }
.menu > .right { align-self: flex-end; }

References