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JavaScript DOM Scripting By Example Improving the Application Code Refactor 1: Create List Items

Posted by sanjeshwari Nand
.a{fill-rule:evenodd;}techdegree
sanjeshwari Nand
Full Stack JavaScript Techdegree Student 4,673 Points

createElement function- help

i have created multiple properties for some elements eg for the edit and remove button, i have both the textContent property and the className property. with the eg in the video ie creating a second function createElement, how do i do that for a) multiple(2) properties and b) do i need to create separate createElement functions for those elements that only have 1 property and those that have multiple ??

1 Answer

Robert Manolis
STAFF
Robert Manolis
Treehouse Guest Teacher
Robert Manolis
Robert Manolis
Treehouse Guest Teacher

Hi Sanjeshwari, it's totally possible to do all that in a single function with the use of conditionals and loops. That's beauty of code. I wrote up a short example of one way to go about this. Check it out.

const createEl = (el, parent, attras = {}, text) => {

      // Create new element
      const newEl = document.createElement(el);

      // If attras parameter contains attributes and values, loop over them and them to new element
      if (Object.keys(attras).length) {
         for (let key in attras) {
            newEl.setAttribute(key, attras[key]);
         }
      }

      // If text parameter is included, add text to element
      if (text) {
         newEl.textContent = text;
      }

      // append new element to parent
      return parent.appendChild(newEl);
   }

   const body = document.querySelector('body');

   createEl('p', body, {class: "myClass", id: "myId"}, 'Test');

The above code can be dropped into any client side JS file hooked up to some HTML, and it will add the following HTML to the DOM just before the closing body tag: <p class="myClass" id="myId">Test</p>.

Hope that helps! :thumbsup:

sanjeshwari Nand
.a{fill-rule:evenodd;}techdegree
sanjeshwari Nand
Full Stack JavaScript Techdegree Student 4,673 Points

thank you so much Robert! that was very helpful ! :)