For educational purposes only

medium_follow_unfollow.js

//Follow all the users in the current Medium page
function filterNodeListByAttribute(nodeList, attributeName) {
	let foundAttributeValues = []
	return Array.prototype.slice.call(nodeList).filter(function(node) {
		let attributeValue = node.getAttribute(attributeName)
		return foundAttributeValues.indexOf(attributeValue) == -1 && foundAttributeValues.push(attributeValue)
	})
}

filterNodeListByAttribute(document.querySelectorAll('*[data-action="toggle-subscribe-user"]:not(.is-active)'), 'data-action-value').forEach(subscribeButton => subscribeButton.click())





//Unfollow all the users in the current Medium page
function filterNodeListByAttribute(nodeList, attributeName) {
	let foundAttributeValues = []
	return Array.prototype.slice.call(nodeList).filter(function(node) {
		let attributeValue = node.getAttribute(attributeName)
		return foundAttributeValues.indexOf(attributeValue) == -1 && foundAttributeValues.push(attributeValue)
	})
}

filterNodeListByAttribute(document.querySelectorAll('*[data-action="toggle-subscribe-user"].is-active'), 'data-action-value').forEach(subscribeButton => subscribeButton.click())