Implementation of getElementsByAttributes API for HTML DOM

getElementsByAttributes.js

document.getElementsByAttribute =
  Element.prototype.getElementsByAttribute = (attr, value) => {
    const nodeList = document.getElementsByTagName('*'),
          matchedNodes = []
  
    for(let node of nodeList) {
      if(node.hasAttribute(attr)) {
        if(value === '*')
          matchedNodes.push(node)
        else 
          if(node.getAttribute(attr) === value)
            matchedNodes.push(node)
      }
    }
    
    return matchedNodes
  }