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Cedar + Vue

Cedar components are built using Vue (opens new window) and can only be used in Vue projects.

All components are available using an NPM package (opens new window).

Terminal

npm install --save @rei/cedar

Once installed, you can import individual Cedar components from the main package into your project:

Main.vue

<script>
// import packages from Cedar
import { CdrText, CdrButton, CdrLink } from '@rei/cedar'

export default {
  name: 'ExampleComponent',
  // register your Cedar components
  components: {
    CdrText,
    CdrButton,
    CdrLink
  }
};
</script>

<template>
  // use the registered Cedar components in your template
  <cdr-text>Foo</cdr-text>
  <cdr-button>Bar</cdr-button>
  <cdr-link>Baz</cdr-link>
</template>

<style>
  // no need to import any Cedar related CSS here
</style>

index.scss

/* import the Cedar CSS reset and fonts first,
  these files only needs to be loaded once on each page,
  components should expect that the micro-site consuming them will load the fonts and reset */
@import url('@rei/cedar/dist/cdr-fonts.css');
@import url('@rei/cedar/dist/style/reset.css');
/* import each component used in your project  */
@import url('@rei/cedar/dist/style/cdr-text.css');
@import url('@rei/cedar/dist/style/cdr-button.css');
@import url('@rei/cedar/dist/style/cdr-link.css');

---

Setting Up Projects

All components depend upon core reset and font assets. Without these assets included, components will not render correctly. These files are distributed as part of the Cedar NPM package.

Install Vue Components Package

Terminal

npm install --save @rei/cedar

Install Required Core Styles

Cedar requires a core reset stylesheet to render properly. This file should be loaded once per micro-site, and it should be the first CSS file loaded.

To include the stylesheet, import the reset.css file:

main.scss

@import url('@rei/cedar/dist/style/reset.css');

Install Required Fonts

Cedar uses specific fonts – Stuart and Graphik – that are required for your project. These fonts are available in the Cedar NPM package and mapped using the cdr-fonts.css file.

To include these fonts, import cdr-fonts.css:

main.scss

@import url('@rei/cedar/dist/cdr-fonts.css');

---

Include Component CSS

How you include CSS depends on your tech stack and varies from project to project. We recommend using postcss with the postcss-import plugin to allow Cedar CSS assets to be de-duped. If you are using FEBS^6 then this is set up for you by default.

1. Create an SCSS file that imports the CSS for any Cedar components used in your project.

index.scss

/* import each component used in your project  */
@import url('@rei/cedar/dist/style/cdr-text.css');
@import url('@rei/cedar/dist/style/cdr-button.css');
@import url('@rei/cedar/dist/style/cdr-link.css');

2. Load that file in your main JavaScript entry:

index.js

import './index.scss';
/* rest of your component/app */

Cedar CSS assets can all be found inside node_modules/@rei/cedar/dist/style/. Filenames for component CSS match the kebab-case name of the component.

Include Full CSS

For public facing production micro-sites you should always optimize your Cedar CSS imports by only loading the assets you need. However, for some projects it may make sense to skip that process and just load all of the Cedar assets. To support this we provide both compiled and un-compiled versions of the full Cedar CSS. If your project is loading shared components then you should use the un-compiled version (@rei/cedar/dist/style/cedar-full.css) along with postcss and postcss-import to ensure that duplicate Cedar assets are not loaded. If your project is not using any shared components or has no build system at all it may make more sense to use the compiled version (@rei/cedar/dist/cedar-compiled.css).

---

Using Components

The examples in our documentation demonstrate usage in a Single File Component (opens new window). If you aren’t using SFCs, read the Vue.js documentation for registering components (opens new window).

Examples below demonstrate the CdrButton component. Refer to each component’s documentation for a complete component API and advanced examples.

Loading a component in Vue

1. Import the component within the script block.

local.vue

import { CdrButton } from '@rei/cedar';

2. Register the component in the components: object.

local.vue

components: {
  CdrButton
}

3. Add the component element, such as <cdr-button> into the template.

local.vue

<cdr-button>I'm a button</cdr-button>

4. Load Cedar CSS assets in your main CSS file:

index.scss

/* import the button CSS file */
@import url('@rei/cedar/dist/style/cdr-button.css');

Final file:

local.vue

<template>
    <cdr-button>I'm a button</cdr-button>
</template>

<script>
import { CdrButton } from '@rei/cedar';
export default {
  ...
  components: {
      CdrButton
  }
}
</script>

index.scss

@import url('@rei/cedar/dist/style/cdr-button.css');

Configure Component Props

Props are custom attributes registered on a component. For more information about props, read Vue's Props documentation (opens new window).

Most Cedar components provide props to configure component data, display, and logic. For example, the CdrButton component provides a size prop to configure the button’s size.

<cdr-button size="large">I'm a large button</cdr-button>

Refer to each component’s API documentation for a full list of available properties.

Bind Dynamic Data to Components

Props can be static or dynamic (opens new window). To provide dynamic data (or non-string data) add a colon (:) before the prop name.

Prop names are also documented and referenced in JavaScript as camel case, but used in the template as kebab-case (opens new window).

In this example, the size prop accepts a string denoting size at different breakpoints.

<cdr-button size="small@xs large@sm">I'm a responsive button</cdr-button>

Add Content Using Slots

Some components use slots for content distribution. Most components will have a single default slot; others will have named slots or scoped slots. Slots are listed as part of the API for all components. For more information about slots, read Vue's Slots documentation (opens new window).

Adding content to a component that has a default slot

<cdr-button>I'm content in the default slot</cdr-button>

Adding content to a component that has named slots

<my-component>
  <template #header>I'm content in the header slot</template>

  <template #footer>I'm content in the footer slot</template>
</my-component>

Adding content to a scoped slot

<my-component>
  <template #name-of-the-slot="scopeObject">
    {{scopeObject.content}} {{scopeObject.someAttribute}}
  </template>
</my-component>

---

CSS Modules and Custom Class Names

Component CSS class names use CSS Modules (opens new window) that reflect the package version. For example, @rei/cedar@42.1.3 will have classes that end in _42.1.3. This allows for multiple versions of Cedar to be used together on the same page.

Never use Cedar class names within your own CSS or target them in JavaScript; they will change as you upgrade the package and break any functionality or styling you attach to them.

To target CSS, create custom selectors such as my-wrapper and my-selector in the following example…

<template>
  <div class="my-wrapper">
    <cdr-button class="my-selector">I'm a button</cdr-button>
  </div>
</template>

...

<style>
.my-wrapper > .my-selector {
 /* override button styles here */
}
</style>

Some components are more complex and have templates with multiple areas where you may wish to add your own selectors. We try to be mindful of this and add props that will allow you to target your own classes to various elements.

For example with checkbox you may want to target both the label and the content areas.

<template>
  <cdr-checkbox label-class="my-label" content-class="my-content">My checkbox</cdr-checkbox>
</template>

...

<style>
.my-label {

}

.my-content {

}
</style>

If you find that a component needs to have a targeted prop class added, please create an issue (opens new window) and let us know.

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Using Token Variables

Cedar provides a robust collection of design tokens (opens new window) corresponding to Cedar's foundations. Standard colors, typography, space, size and other properties are available in the cdr-tokens package. Outputs support web, iOS, and Android consumers.

As you create your own components, work with your designer to take advantage of this inventory in your custom classes. Using them this way will ensure your custom styles remain consistent with design guidelines.

Install Tokens Package

Resources are available within the CdrToken package (opens new window):

• SCSS variables at dist/scss/cdr-tokens.scss
• LESS variables at dist/less/cdr-tokens.less
• JS as both commonJS and ES module at dist/js. Also noted in package.json as main and module respectively
  • dist/js/cdr-tokens.common.js
  • dist/js/cdr-tokens.esm.js

To incorporate the required assets, use the following steps:

1. Install the CdrToken package using npm in your terminal:

Terminal

npm install --save @rei/cdr-tokens

Using Cedar Design Tokens

The package contains files for using tokens in both CSS (as SCSS and LESS variables) and JavaScript (as commonJS and ES modules).

Here we’re using a typography mixin and a color token to style .myClass from the SCSS tokens file.

local.vue

<template>
  <p class="myClass">I'm styled with tokens!</p>
</template>

<script>
export default {
  ...
}
</script>

<style lang="scss">
@import '~@rei/cdr-tokens/dist/scss/cdr-tokens.scss';

.myClass {
  @include cdr-text-default-body();
  color: $cdr-color-text-primary;
}
</style>