lib/js/src/dom/data.js

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v5.1.3): dom/data.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
 * --------------------------------------------------------------------------
 */

/**
 * ------------------------------------------------------------------------
 * Constants
 * ------------------------------------------------------------------------
 */

const elementMap = new Map()

export default {
    set(element, key, instance) {
        if (!elementMap.has(element)) {
            elementMap.set(element, new Map())
        }

        const instanceMap = elementMap.get(element)

        // make it clear we only want one instance per element
        // can be removed later when multiple key/instances are fine to be used
        if (!instanceMap.has(key) && instanceMap.size !== 0) {
            // eslint-disable-next-line no-console
            console.error(`Bootstrap doesn't allow more than one instance per element. Bound instance: ${Array.from(instanceMap.keys())[0]}.`)
            return
        }

        instanceMap.set(key, instance)
    },

    get(element, key) {
        if (elementMap.has(element)) {
            return elementMap.get(element).get(key) || null
        }

        return null
    },

    remove(element, key) {
        if (!elementMap.has(element)) {
            return
        }

        const instanceMap = elementMap.get(element)

        instanceMap.delete(key)

        // free up element references if there are no instances left for an element
        if (instanceMap.size === 0) {
            elementMap.delete(element)
        }
    }
}