# Changelog

## March 23, 2025 20.0.1
* Fix `select()` styles.

## January 29, 2025 20.0.0
* Fix `input-group()` layout.

## November 5, 2024 19.0.5
* Fix `input-group()` layout.

## October 23, 2024 19.0.4
* Reduce the level of detail of the inter-element margins in `set-between-content-level()`.

## September 14, 2024 19.0.3
* Fix `input-group()` layout.

## August 9, 2024 19.0.2
* `_container-padding()` to `core.container-padding()`.

## July 31, 2024 19.0.1
* Update form control styles.

## July 31, 2024 19.0.0
* node-sass to sass. More details: https://github.com/sass-basis/basis/issues/123

## July 19, 2024 18.2.4
* Update form controls.

## May 24, 2023 18.2.2
* Fixed a bug that the screen width set to the maximum value in `_media-only()` would not be displayed as intended.

## May 16, 2023 18.2.1
* Update packages.
* Remove html5shiv.

## February 24, 2023 18.2.0
* Apply fluid typography.
* Add `--_min-harmonic-sequence-base`.
* Add `--_max-harmonic-sequence-base`.
* Add `--_fluid-font-size`.

## February 20, 2023 18.1.7
* Add `data-submenu-visibility` to `.c-navbar__item`.

## February 16, 2023 18.1.5
* Fix `.c-container` max-width.

## February 16, 2023 18.1.4
* Fixed a bug that `.c-container` could be wider than the screen width on iOS and Safari.

## February 15, 2023 18.1.3
* Some fixes for `_fluid-container()`.

## February 15, 2023 18.1.2
* Remove `$use-safe-area` argment of `_container-padding()` and `_container()`.

## February 13, 2023 18.1.1
* Add `--_global--container-margin`.
* Add `--_global--container-max-width`.
* Changed the font size so that it does not get larger in landscape mode on iOS.

## February 8, 2023 18.0.3
* Fixed a bug that caused the container width to exceed the screen width in landscape mode on the iPhone.

## February 7, 2023 18.0.2
* CSS vars for `font-size` and `line-height`, move to `settings.scss` from `base.scss`.

## February 2, 2023 18.0.1
* `_set-content-level()` add `margin-top` only. Remove `margin-bottom`.

## January 13, 2023 18.0.0-beta6
* Add `--_list-item-indent`.

## December 20, 2022 18.0.0-beta5
* Refactoring `_media-min()`、`_media-max()` and `_media-only()`.
* Fixed a bug that `.c-row__col` sometimes didn't get the intended size.

## December 19, 2022 18.0.0-beta4
* Refactoring width of `.c-row` and `.c-row__col` CSS.
* Deprecated: `_lattice()`.
* Deprecated: `_lattice__col()`.
* Deprecated: `_lattice__col--width()`.
* Deprecated: `_lattice__col--width()`.
* Deprecated: `_row__col()`.
* Deprecated: `_row__col--width()`.

## December 19, 2022 18.0.0-beta3
* Add `--_global--line-height`.
* Deprecated: `--_base-font-size-px`.
* Add `--_global--font-size-px`.
* Add `--_global--transition-duration`.
* Add `--_global--transition-function-timing`.
* Add `--_global--transition-delay`.
* Add `--_global--border-radius`.
* Add `--_global--background-color`.
* Remove `--_background-color` in `:root`.
* Change gap of `.c-row` to CSS vars.

## December 14, 2022 18.0.0-beta2
* `_set-between-content-level()` permits only `-2` to `-7`.
* `_set-content-level()` permits only `-2` to `-7`.

## December 13, 2022 18.0.0-beta
* Remove normalize.css
* Remove: `$_base-margin-bottom`.
* Deprecated: `var-xxx()`.
* Deprecated: `$_xxx`.
* Change `$_container-max-width` `1200px` to `1280px`.
* Add `_set-font-size-level()`.
* Remove: `$_h1-font-size-scale` 〜 `$_h6-font-size-scale`.
* Deprecated: `_between-content()`.
* Deprecated: `_content()`.
* Add: `_set-between-content-level()`.
* Add: `_set-content-level()`.
* Deprecated: `_margin-top()`, `_margin-right()`, `_margin-bottom()`, `_margin-left()`, `_margin()`.
* Deprecated: `_font-size()`.
* Deprecated: `_line-height()`.
* Deprecated: `_font-size-line-height()`.
* Add: `--_space-unitless`.
* Deprecated: `_top()`, `_right()`, `_bottom()`, `_left()`, `_position()`.
* Remove: `--_container-margin-sm`.
* Deprecated: `_space()`.
* Deprecated: `_row--margin()`.
* Deprecated: `_row__col--margin()`.
* Add: `--_color-red`.

## November 7, 2022 17.1.1
* Fix a bug that c-page-effect does not disappear when page back.

## November 1, 2022 17.1.0
* Add `_var-transition-delay()`.
* Add new CSS custom property: `--_transition-delay`.

## March 8, 2022 17.0.1
* Fixed a bug that `.c-form-control > input[type=text]` ruled lines were missing on iPhone 8.
* Update `_line-height()`.

## February 28, 2022 17.0.0
* Change `_hover()`. Judge not by screen size, by whether hover is supported and whether the pointer device is supported.
* Update `_line-height()`.

## December 25, 2021 16.0.4
* Some fixes.

## December 25, 2021 16.0.2
* Using CSS function, `min()` and `max()`.
* Change breakpoints unit, `em` to `px`.

## December 20, 2021 16.0.1
* Add new CSS custom property: `--_base-font-family`.

## December 17, 2021 16.0.0
* Drop IE support.
* Add new function: `_font-size()`.
* Add new function: `_line-height()`.
* Add new CSS custom property: `--_form-control-border-color`.
* Add new CSS custom property: `--_form-control-border-color-hover`.
* Add new CSS custom property: `--_form-control-border-color-focus`.
* Add new CSS custom property: `--_transition-duration`.
* Add new CSS custom property: `--_transition-function-timing`.
* Add new CSS custom property: `--_base-font-size-px`.

## November 8, 2021 15.0.3
* Support sub navigation hover effect on mobile device.

## August 28, 2021 15.0.2
* Refactoring drawer / dropdown / navbar CSS.

## July 20, 2021 14.0.3
* Fix bug that submenus of navbar is not opened on IE 11.

## July 19, 2021 14.0.2
* Fixes html grammar violations.

## June 29, 2021 14.0.1
* Fixed a bug with raw CSS in the `_drawer()`.

## May 19, 2021 14.0.0
* Refactoring JavaScript code.
* `.c-drawer-close-zone` is generated automatically.
* Remove event `clickDrawerCloseZone`.
* Add event `closeDrawerCloseZone`.
* Remove all static methods of `BasisDrawerCloseZone`.
* Remove all static methods of `BasisDrawer`.

## April 29, 2021 13.0.2
* Update calculating line-height.

## April 22, 2021 13.0.1
* Add `_var-margin-scale()` to `.c-row`, `_row()` and `_lattice()`.

## April 22, 2021 13.0.0
* Abandon `$_base-font-size`.
* Abandon `$_between-lines`.
* Avandon `_vertical-rhythm()`.
* `$_base-line-height` cannot be overwritten.
* Add `$_half-leading`.
* Add `_var-half-leading()`.
* Add `_container-padding()`.
* Support safe area at `.c-container` and `_container()`.

## March 12, 2021 12.4.0
* Add `$apply-space-scale` arg and `$apply-margin-scale` arg to `_space()`

## March 9, 2021 12.3.1
* Some fixes

## March 9, 2021 12.3.0
* Add `$apply-margin-scale` arg to `_margin-top()`
* Add `$apply-margin-scale` arg to `_margin-right()`
* Add `$apply-margin-scale` arg to `_margin-bottom()`
* Add `$apply-margin-scale` arg to `_margin-left()`
* Add `$apply-margin-scale` arg to `_margin()`
* Add `$apply-margin-scale` arg to `_padding()`

## March 5, 2021 12.2.2
* Fix page header layout broken bug for IE11.

## February 18, 2021 12.2.1
* Add margins to elements in blockquote.
* Add typography page.

## December 4, 2020 12.2.0
* Add `.c-drawer__focus-point`

## November 13, 2020 12.1.1
* When clicked on an anchor link in the same page, the fade-out loading screen appears and does not disappear.

## October 16, 2020 12.1.0
* Add `.c-drawer--inverse`.

## August 28, 2020 12.0.1
* Add `--_dark-color-gray`.
* Add `--_darker-color-gray`.
* Add `--_darkest-color-gray`.
* Add `--_light-color-gray`.
* Add `--_lighter-color-gray`.
* Add `--_lightest-color-gray`.
* Add `--_dark-color-text`.
* Add `--_darker-color-text`.
* Add `--_darkest-color-text`.
* Add `--_light-color-text`.
* Add `--_lighter-color-text`.
* Add `--_lightest-color-text`.

## August 28, 2020 12.0.0
* Add `$_color-white`.
* Add `--_color-white`.
* Add `--_color-black`.
* Add `--_color-gray`.
* Add `--_form-control-border-color`.
* Add `--_form-control-border-color-hover`.
* Add `--_form-control-border-color-focus`.
* Add `_var-color-white()`.
* Add `_var-color-black()`.
* Add `_var-color-gray()`.
* Add `_var-dark-color-gray()`.
* Add `_var-darker-color-gray()`.
* Add `_var-darkest-color-gray()`.
* Add `_var-light-color-gray()`.
* Add `_var-lighter-color-gray()`.
* Add `_var-lightest-color-gray()`.
* Add `_var-dark-color-text()`.
* Add `_var-darker-color-text()`.
* Add `_var-darkest-color-text()`.
* Add `_var-light-color-text()`.
* Add `_var-lighter-color-text()`.
* Add `_var-lightest-color-text()`.
* Add `_var-form-control-border-color()`.
* Add `_var-form-control-border-color-hover()`.
* Add `_var-form-control-border-color-focus()`.
* `_hamburger-btn()` color now supports list.
* `_page-effect()` background-color now supports list.
* `_circle-spinner()` color now supports list.
* Add accent-color to `_circle-spinner()`.
* `_dots-spinner()` color now supports list.
* `_pulse-spinner()` color now supports list.
* `_balloon()` border-color, background-color now supports list.
* `_ghost()` color now supports list.

## July 20, 2020 11.1.0
* Add `_invisible()`.
* Add `u-invisible`, `u-invisible-xxx`, `u-invisible-xxx-up` and `u-invisible-xxx-down`.

## June 29, 2020 11.0.3
* Remove node-normalize-scss and install normalize.css

## June 26, 2020 11.0.2
* Remove `speak` from `.u-hidden-xxx` and `.u-visible-xxx`.
* Add `visibility: hidden` to `.u-hidden-xxx`.
* Add `visibility: visible` to `.u-visible-xxx`.

## June 3, 2020 11.0.1
* Fixed design collapse of `.c-select--block`.

## May 21, 2020 11.0.0
* Fixed a bug that `_drawer` and `.c-drawer` does not scroll correctly on iOS Safari.
* Fixed a bug that `_dropdown` and `.c-dropdown` does not scroll correctly on iOS Safari.
* Remove Basis font. The following components are affected: `.c-ic-*`, `.c-breadcrumbs`, `.c-drawer`, `.c-dropdown` and `.c-navbar[data-popup-mode="click"]`.

## April 3, 2020 10.1.1
* Hover effect apply only lg size.

## March 25, 2020 10.1.0
* Add CSS custom property: `--_container-margin-sm`
* Add function: `_var-container-margin-sm()`

## March 24, 2020 10.0.1
* Add function: `_var-background-color()`

## March 23, 2020 10.0.0
* Add CSS custom property: `--_container-margin`
* Add CSS custom property: `--_container-max-width`
* Add CSS custom property: `--_border-radius`
* Add CSS custom property: `--_color-text`
* Add CSS custom property: `--_background-color`
* Add CSS custom property: `--_space`
* Add CSS custom property: `--_margin-scale`
* Add function: `_var-container-margin()`
* Add function: `_var-container-max-width()`
* Add function: `_var-border-radius()`
* Add function: `_var-color-text()`
* Add function: `_var-space()`
* Add function: `_var-margin-scale()`
* Add mixin `_between-content()`
* Redesigned form controls. See more https://github.com/sass-basis/basis/issues/122

## March 4, 2020 9.6.1
* Update expand direction the submenu of c-navbar

## February 5, 2020 v9.6.0
* Add `_lattice()` abstract.
* Review the balance of vertical-rhythm when the font size is small.

## February 4, 2020 v9.5.10
* Review the balance of vertical-rhythm when the font size is small.
* Fixed a bug that `hidden-xx` and `visible-xx` were not linked with `$_sizes`.

## December 28, 2019 v9.5.9
* Fixed a drawer not closing when clicking a link in the drawer.

## December 28, 2019 v9.5.8
* Fix IE11 JS error.

## December 28, 2019 v9.5.7
* Update npm packages.

## December 13, 2019 v9.5.6
* Fix navbar js error.

## November 3, 2019 v9.5.5
* Fix `.c-navbar--center` bug.
* Fix `.u-hidden` bug.

## September 13, 2019 v9.5.4
* Refactoring drawer script.
* Refactoring navbar script.

## August 29, 2019 v9.5.3
* Some fixes for drawer.

## August 17, 2019 v9.5.2
* Fix a bug that c-page-effect does not disappear when page back on iOS Safari.

## August 10, 2019 v9.5.1
* Prevent body scrolling when open the `.c-drawer--fixed` and `.c-dropdown--fixed`.
* Fix bug that focus not move when drawer opening.

## August 9, 2019 v9.5.0
* Add `_dropdown()`;
* Add `.c-dropdown`;
* Add `.u-noscroll`;
* Prevent body scroll when `.c-drawer--fixed` and `.c-dropdown--fixed` just below the body is opened.

## July 30, 2019 v9.4.0
* Support multi property at `_transition()`.
* Change default transition duration .1s to .2s.
* Fix bug that animation not apply when closing drawer.
+ Drawer animation abstract to component.

## June 24, 2019 v9.3.2
* Fixed the bug that input group button might be hidden.

## June 11, 2019 v9.3.0
* Add `.c-navbar[data-popup-mode="click"]`

## May 23, 2019 v9.2.14
* Fix `_balloon()` bug.

## April 11, 2019 v9.2.13
* Corrected focus to return to correct position when the drawer is closed

## April 10, 2019 v9.2.12
* Update checkbox accesible
* Update radio accesible
* Update textarea default style

## April 8, 2019 v9.2.11
* Update drawer accesible
* Update checkbox styles

## March 6, 2019 v9.2.10
* Refactoring JavaScript codes

## March 1, 2019 v9.2.9
* Fixed a bug that `.c-select` not working on IE11
* Remove jQuery code

## December 5, 2018 v9.2.7
* Add `.c-form-control--has-icon`

## November 27, 2018 v9.2.6
* Refactoring drawer and hamburger button.

## November 27, 2018 v9.2.5
* Fix hamburger button bug on FireFox.

## November 22, 2018 v9.2.4
* Refactoring `.c-drawer-close-zone`

## November 22, 2018 v9.2.3
* Refactoring `.c-hamburger-btn` and `.c-drawer`

## November 12, 2018 v9.2.2
* Update `.c-input-group` for iOS Safari.

## October 31, 2018 v9.2.1
* Update npm-scripts
* Change if `$_font-path` is null, `@font-face` is not output

## September 28, 2018 v9.2.0
* Add `_responsive-container()`
* Add `.c-responsive-container-16-9`
* Add `.c-responsive-container-4-3`

## September 14, 2018 v9.1.4
* Add `_pre()`

## August 31, 2018 v9.1.3
* Close drawer when link clicked.

## August 30, 2018 v9.1.2
* Update manual
* Update babel and rolup-babel
* Close drawer when link clicked.

## July 27, 2018 v9.1.1
* Remove gulp and yarn

## July 27, 2018 v9.1.0
* Add `.c-navbar--center`
* Upgrade gulp #110

## June 14, 2018 v9.0.0
* Add `_responsive-talbe()`
* Add `.c-responsive-table`
* Remove `.c-row__col--offset-*`
* Remove `.c-copyright`
* Remove `_flex-media()`
* Remove `.c-flex-media`
* Remove `_card()`
* Remove `.c-card`
* Refactoring `_hamburger-button()`
* Refactoring `.c-hamburger-button`
* Accessibility fix for `.c-navbar`

## February 21, 2018 v8.0.5
* Fix drawer bug.
* Fix `_content()` bug.

## February 1, 2018 v8.0.4
* `max-width` of `_c-container` changed unit rem to px.

## December 27, 2017 v8.0.3
* Keyboad support for `.c-navbar`.

## December 5, 2017 v8.0.2
* Change code element color
* Fix page-effetct js bug

## October 25, 2017 v8.0.1
* Fix container width bug over lg.
* Fix background fixed hero bug over lg.

## October 24, 2017 v8.0.0
* Add function `_px2em()`
* Add `size` argument to `_hover()`
* Add `xl` break point.
* Add `.u-hidden-lg-up`
* Add `.u-hidden-xl`
* Add `.u-hidden-xl-up`
* Add `.u-visible-lg-up`
* Add `.u-visible-xl`
* Add `.u-visible-xl-up`

## October 7, 2017 v7.0.3
* Fix typo aria-labelledby

## October 6, 2017 v7.0.2
* Remove margin of `.c-entry__content > *` from `_content()`

## June 18, 2017 v7.0.0
* Change default prefix. `_` to blank.
* Remove class `.u-animate-size` and `.u-animate-opacity`
* Remove mixin `_transition-all()`, `_transition-size()` and `_transition-opacity()`
* Remove mixin `_media-{size}-only()`
* Add mixin `_media-only($size)`
* Remove variable `$_sizes-max`
* Add function `_min($size)`, `_max($size)`, `_prev-size-key($size)` and `_next-size-key($size)`
* Media query mixin use `calc()`
* Remove function `_has-search()`
* Remove class `.c-row__col--shrink`
* Remove class `.c-navbar--auto`
* Add class `.c-navbar--left` and `.c-navbar--right`
* Remove class `.c-content`
* Add class `.u-content`
* Add abstract `_page-header()`
* Add abstract `_section()`
* Add abstract `_breadcrumbs()`
* Add abstract `_entries()`
* Add abstract `_entry()`
* Add abstract `_meta()`
* Add abstract `_site-branding()`
* Add mixin `_hidden()`
* Add mixin `_visible()`
* Remove classes `.u-visible-{size}-{display}`
* Add classes `.u-visible-{size}`, `.u-visible` and `.u-hidden`
* Remove class `.c-drawer__body`
* Change abstract `_container-fluid()` to `_fluid-container()`
* Change class `.c-container-fluid` to `.c-fluid-container`
* Change abstract `_spinner-circle()` to `_circle-spinner()`
* Change class `.c-spinner-circle` to `.c-circle-spinner`
* Change abstract `_spinner-dots()` to `_circle-dots()`
* Change class `.c-spinner-dots` to `.c-circle-dots`
* Change abstract `_spinner-pulse()` to `_circle-pulse()`
* Change class `.c-spinner-pulse` to `.c-circle-pulse`
* Change abstract `_balloon-top()` to `_top-balloon()`
* Change class `.c-balloon-top` to `.c-top-balloon`
* Change abstract `_balloon-right()` to `_right-balloon()`
* Change class `.c-balloon-right` to `.c-right-balloon`
* Change abstract `_balloon-bottom()` to `_bottom-balloon()`
* Change class `.c-balloon-bottom` to `.c-bottom-balloon`
* Change abstract `_balloon-left()` to `_left-balloon()`
* Change class `.c-balloon-left` to `.c-left-balloon`
* Change class `.u-animate` to `.u-transition`
* Change class `.u-animate-shake-vertical` to `.u-shake-vertical`
* Change class `.u-animate-vibrate-vertical` to `.u-vibrate-vertical`
* Change class `.u-animate-shake-horizontal` to `.u-shake-horizontal`
* Change class `.u-animate-vibrate-horizontal` to `.u-vibrate-horizontal`
* Change class `.u-animate-shake-scale` to `.u-shake-scale`
* Change class `.u-animate-vibrate-scale` to `.u-vibrate-scale`
* Change class `.u-animate-extend-underline` to `.u-extend-underline`
* Remove `data-c` attribute

## June 9, 2017 v6.5.0
* Added `_content()`
* Added `._c-content`
* Added `_is-number()`
* Added `._u-hidden-md-up`
* Added `._u-visible-md-up-*`
* Fix `._c-select` bug
* Fix `_is-int()` bug
* Fix `._c-btn--block` bug
* `_space()` is able to use `calc`

## March 30, 2017 v6.4.0
* Added `_pagination()`
* Added `._c-pagination`

## March 29, 2017 v6.3.2
* Update README

## March 3, 2017 v6.3.1
* Fix typo

## March 3, 2017 v6.3.0
* Update btn, alert, balloon and card padding.
* Added `_ib-row()`. This is inline-block base abstract.

## February 25, 2017 v6.2.1
* Bug fix for npm publish

## February 25, 2017 v6.2.0
* Update for npm publish
* Update `$_font-path`

## February 22, 2017 v6.1.3
* Fix `._u-text-left` bug.
* Fix `._u-text-right` bug.
* Fix `._u-pull-left` bug.

## February 22, 2017 v6.1.2
* Fix bug that `._c-select--block` is not reflected.

## February 20, 2017 v6.1.1
* Update `._c-checkbox`
* Update `._c-radio`
* Fix bug that background-color of `_page-effect()` is not reflected.

## February 20, 2017 v6.1.0
* Added styleguide.
* Update `._c-checkbox` and `_checkbox()`
* Update `._c-radio` and `_radio()`
* Update `._c-form-control` and `_form-control()`
* Update `._c-input-group` and `_input-group()`
* Update `._c-select` and `_select()`

## February 14, 2017 v6.0.2
* Fix line-height of Form elements for normalize.css.
* Refactoring grid margin calculation.
* Fix zip task bug.
* Fix normalize.css importing bug.

## February 12, 2017 v6.0.1
* Refactoring normalize.scss importing.

## February 7, 2017 v6.0.0
* Refactoring
* Using yarn

## September 29, 2016 v5.5.2
* Refactoring `._c-flex-media` for IE9.
* Refactoring `._c-media` for IE9.

## September 28, 2016 v5.5.1
* Refactoring `._c-flex-media` for IE9.
* Refactoring `._c-row__col--fit` for IE9.

## July 26, 2016 v5.5.0
* Add `._c-row__col--fit` #96
* Fixed `._c-flex-media__figure` margin #95

## July 26, 2016 v5.4.1
* Fixed bug that double definition of `._c-row__col--auto`

## July 26, 2016 v5.4.0
* Add `._c-row__col--shrink` #94

## July 26, 2016 v5.3.0
* Add the flex-media component #92
* `._c-media`: background-image figure support #93

## July 16, 2016 v5.2.1
* Fixed column offset bug #90

## July 16, 2016 v5.2.0
* Fixed pre overflow #84
* Fixed a bug `bs-bp-md-max()` #89
* `aria-hidden="true"` should not be `display: none;` fix #85
* Refactoring `._c-row` component
* Added mixin `_space()` #86
* Added mixin `bs-padding()` #86
* Added `._c-row__col--justify` #87
* Added `._u-visible-[size]-flex` #88
* Added mixin `bs-col-width()`
* Added variables for the headings margin

## June 23, 2016 v5.1.0
* Refactoring the auto column size class.
* Added mixin `bs-ghost()`
* Added mixin `bs-background-image-cover()`
* Added mixin `bs-background-image-fixed()`
* Added mixin `bs-overlay()`
* Refactoring mixin `bs-c-form-control()`

## May 25, 2016 v5.0.0
* The document to another repository #58
* Removed `html{ font-size: 62.5% }` #79
* `bs-font-size()`, `bs-line-height()` and `bs-font-size-line-height()` support px #79
* Refactoring `$bs-between-lines` #79
* Changed `$bs-font-size` to `$bs-base-font-size`
* Added a variable `$bs-base-font-size-px`
* Removed auto build on npm install #81
* Fixed opacity transition bug #82
* Added CHANGELOG.md
* Added .editorconfig
* Changed indent style
* Refactoring gulpfile.js

## May 10, 2016 v4.3.2
* Update README

## May 8, 2016 v4.3.1
* Fixed a bug that the Basis set incorrect breakpoint when `$bs-font-size` isn't 1.6rem.

## May 8, 2016 v4.3.0
* Added extending underline animation mixin `bs-extend-underline()`
* Added extending underline animation class `._u-animate-extend-underline`
* Added padding helper mixins.
* Added `._c-row--reverse`

## May 5, 2016 v4.2.7
* Refactoring `._c-hero--cover`
* Refactoring `bs-vertical-rhythm()`
* Changed container margin on smartphone.
* Fixed a image position of media object bug when `$bs-between-lines` changed.

## May 3, 2016 v4.2.6
* Fixed error when npm install
* Fixed media object bug on IE

## May 3, 2016 v4.2.0
* Change comments format.
* Added mixin `bs-bp-md-min`, `bs-bp-md-max`
* Refactoring around media query.

## April 24, 2016 v4.1.0
* Changed GitHub repository.
* Changed license.
* Move imports out of if statement.

## April 21, 2016 v4.0.2
* Fixed a `._c-container` bug.

## April 18, 2016 v4.0.0
* Refactoring directory structure.
* Refactoring input-group style.
* Added variable `$bs-use-mixin-only`. If you don't need classes of the Basis, set to true.
* Added mixins to make the Basis components.
* Added variables for the components of style.

## April 12, 2016 v3.2.0
* Fixed a grid margin bug.
* Added `._c-row--nowrap` class.
* Changed color settings.
* Added the coefficient variable for margin.
* Added the heading element scale variable.
* Added mixin `bs-font-size-line-height`

## April 6, 2016 v3.1.0
* Fixed hidden and visible classes bug.
* Added styles of readonly, disabled and aria-hidden.
* Changed blockquote and form-control styles.

## April 6, 2016 v3.0.1
* Fixed grid margin.

## April 6, 2016 v3.0.0
* Added the hero component.
* Added transition and animation utility classes.
* Updated normalize.css
* Changed base margin.
* Changed breakpoint unit px to em.

## March 10, 2016 v2.2.0
* Fixed a bug that characters aren't displayed on IE8
* Fixed bugs bs-bp-md-only and bs-bp-lg-only
* Added visible classes.
* Added how to contribute section in readme.md

## February 28, 2016 v2.1.2
* Fire Travis CI only master and develop.

## February 28, 2016 v2.1.1
* Added release branch from Travis CI
* Added viewport at the doc.

## February 27, 2016 v2.0.0
* Refactoring gulpfile.js
* Refactoring the grid gutter.
* Fixed grid system bugs.
* Changed directories and files name.
* Changed the col class name.
* Changed to use normalize.css of npm.
* Added vertical mode for the media module.
* Added FLOCSS object type prefix.
* Added IE9 Support ( optional )
* Added some utility classes.
* Removed `._c-row__col--flex` and added `._c-row--fill`
* Removed `._c-row--row`, `._c-row--column`

## January 14, 2016 v1.4.0
* Changed prefix of class name.
* Changed grid system classes name.
* Changed break points.
* Changed form control classes.
* Changed heading elements margin.
* Removed table classes.
* Removed button size classes.
* Removed colors classes.
* Added media object class.

## December 27, 2015 v1.3.0
* Remove text alignment classes.
* Changed directory structure.

## December 16, 2015 v1.2.4
* Remove .bs-item--full
* Refactoring grid system.
* Added hidden classes.
* Changed font size unit. px to rem.
* Changed base font size.

## November 28, 2015 v1.2.3
* Changed wrapper styles.
* Added .bs-container--size-no-gutter
* Removed xs prefix.
* Added button styles.
* Updated alert style.
* Updated wrapper style.

## November 27, 2015 v1.2.2
* Added default flags.

## November 25, 2015 v1.2.0
* Changed heading elements font size.
* Added styles: heading secondary text, tables.
* Added text alignment classes.
* Updated code element style.

## November 21, 2015 v1.1.0
* Added normalize.css
* Added styles: Lists, Blockquote, Forms.
* Added container-gutter style.
* Fixed button style.

## November 20, 2015 v1.0.0
* Release