Displaying an Input Element in the Editor Component

Environment

Product

Progress® Kendo UI® for Angular Editor

Description

How to render an input element in the Editor component?

Solution

The Kendo UI for Angular Editor component delivers a set of tools for creating, editing, and formatting headers, paragraphs, lists, tables, and other HTML elements. But it is not intended to display buttons, inputs, dropdowns, and any other interactive components.

To display an input inside the Editor's value, you need to modify the default ProseMirror Schema.

1. Create an input node following the NodeSpec.

   ts

   // Define the specification for the custom "input" node
   const input: NodeSpec = {
       // Define attributes with their default values
       attrs: {
       src: { default: null }, // Default source attribute
       style: { default: null }, // Default style attribute
   },
   // Indicate that the node belongs to the "block" group
   group: 'block',
   // Define the allowed content within the node (in this case, other block nodes)
   content: 'block*',
   // Make the node not selectable
   selectable: false,
   // Define parsing rules for the DOM representation
   parseDOM: [
       {
       tag: 'input', // Parse <input> tags
           getAttrs: (
               dom: HTMLElement | string
           ): Record<string, any> | false | null => {
               if (typeof dom === 'string') {
               // Handle style rule case here if needed
               return null; // Return null for style rule
           } else {
         // Extract attributes from the DOM element
               return {
                   src: dom.getAttribute('src'),
                   style: dom.getAttribute('style'),
               };
           }
       },
       },
   ],
   // Define how to serialize the node to a DOM representation
   toDOM: (node): [string, ...any[]] => ['input', node.attrs],
   };
   
   // Get the existing node definitions
   let nodes = schema.spec.nodes;
   
   // Add the custom "input" node to the existing nodes
   nodes = nodes.addToEnd('input', input);
   
   // Create the schema with the updated nodes and existing marks
   export const mySchema: Schema = new Schema({ nodes, marks: schema.spec.marks });

2. Add the created input node to the schema.

   ts

   let nodes = schema.spec.nodes;
   nodes = nodes.addToEnd('input', input);
   export const mySchema: Schema = new Schema({ nodes, marks: schema.spec.marks });

3. Provide the custom schema to the built-in schema input property of the Editor.

   html

   <kendo-editor ... [schema]="mySchema" ></kendo-editor>

   ts

   public mySchema: Schema = mySchema;

The following example demonstrates how to display an input element inside the Editor.

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