Customizing SharePoint Forms using JSLink

Lets explore customizing SharePoint Forms using JSLink.
Lets say we want to customize the New Form of a custom list.

Since I am using a SharePoint online environment, I will create a SharePoint Hosted App. This step is not necessary. Lets add a Custom List called Demo to the solution. Add two fields Available and YTD of type single line of text to the list.

Now, open the schema.xml search for the <Forms> section and update the NewForm element as:

<Form Type="NewForm" Url="NewForm.aspx" SetupPath="pages\form.aspx" WebPartZoneID="Main" JSLink="~site/Scripts/jquery-1.9.1.min.js|~site/Scripts/NewFormScript.js" />

Notice that we are loading two scripts one is the JQuery library and the other is our custom script. We can do this by separating the script pats with a ‘|’ character.

Now, right click on the Scripts module and add a JavaScript file NewFormScript.js

Add the following code to this file

(function () {
  var ctx = {};
  ctx.OnPostRender = updateDOM;

function updateDOM(ctx) {
  (function ($) {
    $(document).ready(function () {
      var current = 1;

      //create a new table element which is same as current table element we want to replace
      var newTable ='<table class="ms-formtable" style="margin-top: 8px;" border="0" cellpadding="0" cellspacing="0" width="100%"><tr>';

      //loop through each td in the table
      $(".ms-formtable td").each(function (i) {
        //in the first row, I wanted only one column
        // each field is a set of 2 columns one label and other input control
        // if current column is 2, we want to start a new row similarly if it is 6(next 2 fields)
        if (current == 2 || current == 6) {
          newTable = newTable + $('<div>').append($(this).clone()).remove().html() + '</tr><tr>';
        else {

          newTable = newTable + $('<div>').append($(this).clone()).remove().html();
        current = current + 1;
      newTable = newTable + '</tr></table>';

      // replace the html of existing table with the one we created.

Here we are creating a new object and adding a property OnPostRender with the function we want to execute. Then, we call the SPClientTemplates.TemplateManager.RegisterTemplateOverrides(ctx); method which registers this object. This will execute our function on post render i.e when the DOM is ready.

Within this function, we modify the rendered DOM to look the way we want it. Here we are grabbing td elements in the table which has our columns. Then, we build a new table similar to the existing one. when we reach the specific td when we want to start a new row, we are creating a new tr.

Here I have hard coded 2 and 6 columns. But you can put some logic like current%4 to start a new row every 2 columns.

Deploy the solution. Navigate to the Demo list. In the case of the SharePoint hosted app, you need to specify the url, /Lists/Demo after the app name. Now, when you create a new item, the form should look like
JSLink Output

I have uploaded the solution to github at JSLinkDemo

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