camille
85 lines
2.1 KiB
JavaScript
85 lines
2.1 KiB
JavaScript
import { EVENT_ATTRIBUTE_RE } from './constants.js'
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/**
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* Quick type checking
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* @param {*} element - anything
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* @param {string} type - type definition
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* @returns {boolean} true if the type corresponds
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*/
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export function checkType(element, type) {
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return typeof element === type
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}
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/**
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* Check if an element is part of an svg
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* @param {HTMLElement} el - element to check
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* @returns {boolean} true if we are in an svg context
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*/
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export function isSvg(el) {
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const owner = el.ownerSVGElement
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return !!owner || owner === null
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}
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/**
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* Check if an element is a template tag
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* @param {HTMLElement} el - element to check
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* @returns {boolean} true if it's a <template>
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*/
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export function isTemplate(el) {
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return el.tagName.toLowerCase() === 'template'
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}
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/**
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* Check that will be passed if its argument is a function
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* @param {*} value - value to check
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* @returns {boolean} - true if the value is a function
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*/
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export function isFunction(value) {
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return checkType(value, 'function')
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}
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/**
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* Check if a value is a Boolean
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* @param {*} value - anything
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* @returns {boolean} true only for the value is a boolean
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*/
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export function isBoolean(value) {
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return checkType(value, 'boolean')
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}
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/**
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* Check if a value is an Object
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* @param {*} value - anything
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* @returns {boolean} true only for the value is an object
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*/
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export function isObject(value) {
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return !isNil(value) && value.constructor === Object
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}
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/**
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* Check if a value is null or undefined
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* @param {*} value - anything
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* @returns {boolean} true only for the 'undefined' and 'null' types
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*/
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export function isNil(value) {
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return value === null || value === undefined
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}
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/**
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* Detect node js environment
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* @returns {boolean} true if the runtime is node
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*/
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export function isNode() {
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return typeof globalThis.process !== 'undefined'
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}
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/**
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* Check if an attribute is a DOM handler
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* @param {string} attribute - attribute string
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* @returns {boolean} true only for dom listener attribute nodes
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*/
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export function isEventAttribute(attribute) {
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return EVENT_ATTRIBUTE_RE.test(attribute)
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}
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