Looks like your current code has a selector issue that's preventing the checkboxes from being disabled correctly. Let's break down the problem and fix it with reliable solutions.

What's Wrong with Your Current Code? #

The main issue is this line:

$("table").closest('tbody tr td').find('input:checkbox').prop('disabled', true);

closest() searches upwards for parent elements, but <table> doesn't have a <tbody><tr><td> as a parent—those are child elements of the table. So this selector doesn't actually find any checkboxes at all. Additionally, looping through the raw json.data in initComplete can lead to mismatches if the table's row order doesn't exactly match the raw JSON order.

Solution 1: Use createdRow (Recommended) #

DataTables has a createdRow callback that fires right when a row is added to the DOM. This is the most straightforward way to modify rows as they're created:

this.dtOptions = {
  ajax: 'assets/test.json',
  createdRow: function(row, data, dataIndex) {
    // Check if the row's matchType is "System"
    if (data.matchType === "System") {
      // Disable the checkbox in this row
      $(row).find('input:checkbox').prop('disabled', true);
      // Optional: Add a visual cue that the row is disabled
      $(row).css('opacity', 0.7);
    }
  }
};

Solution 2: Fix the initComplete Approach #

If you prefer to stick with initComplete, use DataTables' API to safely access rows and their DOM elements instead of raw JSON:

this.dtOptions = {
  ajax: 'assets/test.json',
  initComplete: function(settings, json) {
    const table = new DataTable(settings.nTable);
    // Loop through each row using DataTables API
    table.rows().every(function() {
      const rowData = this.data();
      if (rowData.matchType === "System") {
        // Get the row's DOM node and disable its checkbox
        $(this.node()).find('input:checkbox').prop('disabled', true);
      }
    });
  }
};

Key Takeaways #

• Always use DataTables' built-in callbacks or API to interact with table rows—this avoids selector bugs and order mismatches.
• createdRow is ideal for row-specific modifications during table initialization, as it works directly with each row as it's rendered.

内容的提问来源于stack exchange，提问作者Rajasekhar