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export {qs, qsa, $on, $delegate, $parent, remove}
// Get element(s) by CSS selector:
function qs(selector, scope) {
return (scope || document).querySelector(selector)
}
function qsa(selector, scope) {
return (scope || document).querySelectorAll(selector)
}
// addEventListener wrapper:
function $on(target, type, callback, useCapture) {
target.addEventListener(type, callback, !!useCapture)
}
// Attach a handler to event for all elements that match the selector,
// now or in the future, based on a root element
function $delegate(target, selector, type, handler) {
// https://developer.mozilla.org/en-US/docs/Web/Events/blur
var useCapture = type === 'blur' || type === 'focus'
$on(target, type, dispatchEvent, useCapture)
function dispatchEvent(event) {
var targetElement = event.target
var potentialElements = qsa(selector, target)
var hasMatch = Array.prototype.indexOf.call(potentialElements, targetElement) >= 0
if (hasMatch) {
handler.call(targetElement, event)
}
}
}
// Find the element's parent with the given tag name:
// $parent(qs('a'), 'div');
function $parent(element, tagName) {
if (!element.parentNode) {
return undefined
}
if (element.parentNode.tagName.toLowerCase() === tagName.toLowerCase()) {
return element.parentNode
}
return $parent(element.parentNode, tagName)
}
// removes an element from an array
// const x = [1,2,3]
// remove(x, 2)
// x ~== [1,3]
function remove(array, thing) {
const index = array.indexOf(thing)
if (index === -1) {
return array
}
array.splice(index, 1)
}
// Allow for looping on nodes by chaining:
// qsa('.foo').forEach(function () {})
NodeList.prototype.forEach = Array.prototype.forEach
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