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feat(v-b-toggle): check for target ID via href if a link (#5398)
* feat(v-b-toggle): check for target ID via `href` if a link * Update toggle.js * Update toggle.js * Update toggle.js * Update toggle.js * Update toggle.js * Update toggle.spec.js * Update toggle.js * Update README.md Co-authored-by: Jacob Müller <jacob.mueller.elz@gmail.com>
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‎src/directives/toggle/README.md‎

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## Directive syntax and usage
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The directive is applied to the element or component that triggers the visibility of hte target. The
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The directive is applied to the element or component that triggers the visibility of the target. The
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target component can be specified (via its ID) as either a directive modifier(s), the directive
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argument, or as a string/array passed to as the directive value:
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Modifiers, argument, and the value can be used at the same time when targeting multiple components.
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### Example usage
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**Example usage:**
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```html
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<template>
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<!-- v-b-toggle-directive.vue -->
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```
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## Usage on links
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<span class="badge badge-info small">2.15.0+</span>
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If placing the directive on a link (or a component that renders a link), the target ID can
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alternatively be specified via the `href` attribute.
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Note that the browser URL will change and the page may scroll the target into view. To prevent the
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URL from changing and the page from scrolling, add `@click.prevent` to the link.
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**Example usage:**
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```html
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<template>
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<div>
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<div class="mb-3">
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<a v-b-toggle href="#example-collapse" @click.prevent>Toggle Collapse</a>
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<b-button v-b-toggle href="#example-sidebar" @click.prevent>Toggle Sidebar</b-button>
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</div>
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<b-collapse id="example-collapse">
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<b-card title="Collapsible card">
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Hello world!
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</b-card>
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</b-collapse>
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<b-sidebar id="example-sidebar" title="Sidebar" shadow>
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<div class="px-3 py-2">
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Cras mattis consectetur purus sit amet fermentum. Cras justo odio, dapibus ac facilisis
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in, egestas eget quam. Morbi leo risus, porta ac consectetur ac, vestibulum at eros.
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</div>
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</b-sidebar>
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</div>
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</template>
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<!-- v-b-toggle-links.vue -->
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```
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## Hiding and showing content in the toggle trigger element
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When using the `v-b-toggle` directive, the class `collapsed` will automatically be placed on the

‎src/directives/toggle/toggle.js‎

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import KeyCodes from '../../utils/key-codes'
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import looseEqual from '../../utils/loose-equal'
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import { arrayIncludes, concat } from '../../utils/array'
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import { addClass, hasAttr, isDisabled, removeAttr, removeClass, setAttr } from '../../utils/dom'
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import {
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addClass,
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getAttr,
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hasAttr,
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isDisabled,
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isTag,
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removeAttr,
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removeClass,
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setAttr
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} from '../../utils/dom'
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import { isBrowser } from '../../utils/env'
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import { eventOn, eventOff } from '../../utils/events'
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import { isString } from '../../utils/inspect'
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const KEYDOWN_KEY_CODES = [ENTER, SPACE]
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const RX_HASH = /^#/
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const RX_HASH_ID = /^#[A-Za-z]+[\w\-:.]*$/
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const RX_SPLIT_SEPARATOR = /\s+/
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// --- Helper methods ---
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const isNonStandardTag = el => !arrayIncludes(['BUTTON', 'A'], el.tagName)
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const isNonStandardTag = el => !arrayIncludes(['button', 'a'], el.tagName.toLowerCase())
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const getTargets = ({ modifiers, arg, value }) => {
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const getTargets = ({ modifiers, arg, value }, el) => {
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// Any modifiers are considered target IDs
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const targets = keys(modifiers || {})
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// If value is a string, split out individual targets (if space delimited)
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value = isString(value) ? value.split(RX_SPLIT_SEPARATOR) : value
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// Support target ID as link href (`href="#id"`)
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if (isTag(el.tagName, 'a')) {
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const href = getAttr(el, 'href') || ''
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if (RX_HASH_ID.test(href)) {
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targets.push(href.replace(RX_HASH, ''))
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}
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}
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// Add ID from `arg` (if provided), and support value
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// as a single string ID or an array of string IDs
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// If `value` is not an array or string, then it gets filtered out
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setToggleState(el, el[BV_TOGGLE_STATE])
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// Parse list of target IDs
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const targets = getTargets(binding)
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const targets = getTargets(binding, el)
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/* istanbul ignore else */
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// Ensure the `aria-controls` hasn't been overwritten

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