@usepack/vue-bem
v1.4.1
Published
Vue plugin for BEM parameterization
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Table of Contents
Installation
npm i @usepack/vue-bem
/ yarn add @usepack/vue-bem
And install in your entry file (e.g. main.js
):
import { createBem } from '@usepack/vue-bem';
createApp(App).use(createBem({ /* your config here */ })).mount('#app');
API
Available functions:
createBem (options: BemOptions)
:
interface BemOptions {
hyphenate?: boolean;
modifierSeparator?: string;
transformComponentName?: (name: string) => string;
}
Vue instance properties and methods:
$bem ({ b, e, m }: BemItem): string[]
:
interface BemItem {
b?: string;
e?: string;
m?: string | string[] | Record<string, string | number | boolean>;
}
Examples
Using component name by default:
<template>
<div :class="$bem()"> <!-- $bem() will return 'hello-world' -->
Hello world!
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
export default defineComponent({
name: 'hello-world'
});
</script>
<style lang="scss">
.hello-world {
// some styles here
}
</style>
Using hyphenated component name:
If you use PascalCase naming convence you should init library with hyphenate
option:
import { createBem } from '@usepack/vue-bem';
createApp(App).use(createBem({
hyphenate: true
})).mount('#app');
and then:
<template>
<div :class="$bem()"> <!-- returns ['hello-world'] -->
Hello world!
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
export default defineComponent({
name: 'HelloWorld'
});
</script>
<style lang="scss">
.hello-world {
// some styles here
}
</style>
Transforming component name before use in css class names:
If your components have name with prefix (i.e VHelloWorld
) you can init library with transformComponentName
option to remove prefix:
import { createBem } from '@usepack/vue-bem';
createApp(App).use(createBem({
transformComponentName (name: string): string {
return name.replace(/^V/, '');
}
})).mount('#app');
and then:
<template>
<div :class="$bem()"> <!-- returns ['hello-world'] -->
Hello world!
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
export default defineComponent({
name: 'VHelloWorld'
});
</script>
<style lang="scss">
.hello-world {
// some styles here
}
</style>
Custom block name:
<template>
<div :class="$bem({b: 'custom-block'})"> <!-- returns ['custom-block'] -->
Hello world!
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
export default defineComponent({
name: 'HelloWorld'
});
</script>
<style lang="scss">
.custom-block {
// some styles here
}
</style>
Element name:
<template>
<div :class="$bem()"> <!-- (or $bem({b: 'hello-world'})) - return ['hello-world'] -->
<h1 :class="$bem({e: 'title'})"> <!-- (or $bem({b: 'hello-world', e: 'title'})) - returns ['hello-world__title'] -->
Hello world!
</h1>
<p :class="$bem({e: 'description'})"> <!-- (or $bem({b: 'hello-world', e: 'description'})) - returns ['hello-world__description'] -->
This is a description
</p>
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
export default defineComponent({
name: 'HelloWorld'
});
</script>
<style lang="scss">
.hello-world {
// some styles here
&__title {
// some styles here
}
&__description {
// some styles here
}
}
</style>
Inline modfiers:
<template>
<div :class="$bem()"> <!-- returns ['hello-world'] -->
<p :class="$bem({e: 'text', m: ['underlined']})"> <!-- returns ['hello-world__text', 'hello-world__text--underlined'] -->
This is a description
</p>
<p :class="$bem({e: 'text', m: ['underlined', 'highlighted']})"> <!-- returns ['hello-world__text', 'hello-world__text--underlined', 'hello-world__text--highlighted'] -->
This is a description
</p>
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
export default defineComponent({
name: 'HelloWorld'
});
</script>
<style lang="scss">
.hello-world {
// some styles here
&__text {
// some styles here
&--underlined {
// some styles here
}
&--highlighted {
// some styles here
}
}
}
</style>
Conditional modifiers:
<template>
<div :class="$bem()"> <!-- returns ['hello-world'] -->
<p :class="$bem({e: 'description', m: {underlined: true, highlighted: isHighlighted, 'font-weight': 'bold'}})"> <!-- returns ['hello-world__description', 'hello-world__description--underlined', 'hello-world__description--font-weight--bold'] -->
This is a description
</p>
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
export default defineComponent({
name: 'HelloWorld',
data () {
return {
isHighlighted: false
};
}
});
</script>
<style lang="scss">
.hello-world {
// some styles here
&__description {
// some styles here
&--underlined {
// some styles here
}
&--highlighted {
// some styles here
}
&--font-weight {
&--bold {
// some styles here
}
}
}
}
</style>
Using different modifier separator:
If you use _
instead of --
or another separator, you should init library with modifierSeparator
option:
import { createBem } from '@usepack/vue-bem';
createApp(App).use(createBem({
modifierSeparator: '_'
})).mount('#app');
and then:
<template>
<div :class="$bem()"> <!-- returns ['hello-world'] -->
<p :class="$bem({e: 'description', m: {'font-weight': 'bold'}})"> <!-- returns ['hello-world__description', 'hello-world__description_font-weight_bold'] -->
This is a description
</p>
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
export default defineComponent({
name: 'HelloWorld',
});
</script>
<style lang="scss">
.hello-world {
// some styles here
&__description {
// some styles here
&_underlined {
// some styles here
}
&_font-weight {
&_bold {
// some styles here
}
}
}
}
</style>