Helpful DOM utility functions in venilla JS

dom-utility.js

// Code written by Me and
// doc written by Zafree [http://github.com/zafree] vai :D





// Get Siblings
// It is a simple function to get all child from parent
// Feel free to use it like a Pro
function getSiblings(node) {
    var childNodes, siblings;

    childNodes = node.parentNode.childNodes;
    siblings = [];

    for (var i=0, len=childNodes.length; i<len; i++ ) {
        if (childNodes[i].nodeType == 1 && node != childNodes[i]) {
            siblings.push(childNodes[i]);
        }
    }

    return siblings;
}

function addClassToSiblings(node, className) {
    getSiblings(node).forEach(function(elem) {
        elem.classList.add(className);
    });
}

// Get Children
// It is a simple function to get all child from parent
// Feel free to use it like a Pro
function getChildren(node) {
    var childNodes, children;

    childNodes = node.childNodes;
    children = [];

    for (var i=0, len=childNodes.length; i<len; i++ ) {
        if (childNodes[i].nodeType == 1) {
            children.push(childNodes[i]);
        }
    }

    return children;
}

function addClassToChildren(node, className) {
    getChildren(node).forEach(function(elem) {
        elem.classList.add(className);
    });
}