How do I correctly render a ternary expression in a Kendo UI checkbox with Vue.js?

When using Kendo UI templating, you need to use the proper delimiters and avoid escaping characters that interfere with the template syntax. For example, instead of writing:

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<input type="checkbox" class="checkbox" "\# (myVar)  ? ('checked') : '' #">

use the Kendo UI expression syntax as follows:

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<input type="checkbox" class="checkbox" #= myVar ? "checked" : "" #>

Explanation

• Kendo UI Template Syntax:
  The Kendo UI templating uses #= to output an expression. In our case, the ternary operator checks if myVar is true, then outputs checked, otherwise outputs an empty string.

• Avoid Escaping Characters:
  Avoid adding extra escaping characters (like the backslash). They can break the templating engine's ability to recognize the template expression.

• Self-closing the Input:
  If you need a self-closing tag (and your HTML doctype requires it), you can write it as:

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  <input type="checkbox" class="checkbox" #= myVar ? "checked" : "" # />

Vue and Kendo UI Templating

Since you mentioned using Vue as well, note that Vue also uses its own template syntax with double curly braces ({{ }}). If both frameworks are applied to the same markup, you might run into conflicts.

To avoid such conflicts, consider one of these approaches:

• Separate Templating:
  Keep the Vue-managed parts separate from the Kendo UI templated parts.

• Change Vue Delimiters:
  You can change Vue's template delimiters to something other than {{ }} by using the delimiters option:

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  var app = new Vue({
    el: '#app',
    delimiters: ['${', '}'],
    data: {
      myVar: true
    }
  });

This way, you avoid conflicts between Vue and Kendo UI template syntax.

By using the correct syntax and avoiding conflicting escapes, you should be able to render the ternary operator inside your html input checkbox without errors.