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How To

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Quick start

SEO optimizing content

Creating custom models

Using custom fields

Enable on-site previewing and editing

Dynamic URLs and advanced data fetching

Adding Custom Code

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Getting started

Using Next.js

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Using your React components in Builder


Components-only mode

Triggering custom actions


Ruby on rails



Using your react components in Builder

Using your own React components in Builder is one of our most powerful features! Learn how below.

👉Tip: for a lot of examples of using custom components with, see our React style guide example repo!

Install the SDK

To begin, use npm or yarn to install

npm install --save

Builder-Enabling a Component

Below is the actual source for a component we use heavily within our docs. This component takes two props, "code" and "language" and uses react-syntax-highlighter to syntax highlight the code.

This is a normal react component that can be used as you typically would, e.g. <CodeBlock code="..." />, but we want to be able to use this in the Builder drag and drop editor.

To do this, we simply import the withBuilder function from the package in npm. We then add it to our component and specify the name of our component (this is case sensitive and must be unique), and the inputs.

import * as React from 'react';
import SyntaxHighlighter from 'react-syntax-highlighter';
import { Builder } from '';

class CodeBlockComponent extends React.Component {
  render() {
    return (
      <SyntaxHighlighter language={this.props.language}>

Builder.registerComponent(CodeBlockComponent, {
  name: 'Code Block',
  inputs: [
      name: 'code',
      type: 'string',
      defaultValue: 'const incr = num => num + 1',
      name: 'language',
      type: 'string',
      defaultValue: 'javascript',

Including the Component

Next, on any page we want to use this component, we need to be sure to import it. For example, in Builder's docs pages, we simply add one import statemement as shown below:

import './code-block'

For our Builder docs, the full file for this looks like:

import './code-block'
import { BuilderComponent } from '';

export const DocsPage = () => (
  <BuilderComponent modelName="docs-page" />

And in our react router, we simply add:

<Route path="/c/docs" exact={false} component={DocsPage} />

Using the React BuilderComponent

👉Tip: want to limit visual editing to only your custom components? Try components only mode

You may have noticed that above we import { BuilderComponent } from '', but some of our code snippets we use BuilderSimpleComponent. This is intentional - the BuilderSimpleComponent is the simplest option, but for more advanced use cases like including your components you want the BuilderComponent.

Initializing with your api key

One quick note - in all of the below examples we don't include the apiKey attribute on every BuilderComponent. You may do this, but for most react apps it's easier to initialize with your API key one time instead. E.g. in you index.js:

import { builder } from '';

You can find your public client API key over in your organization settings

Input types

Here is a more lengthy example demonstrating more input types

export const CodeBlock = withBuilder(CodeBlockComponent, {
  name: 'Input Examples',
  inputs: [
    { name: 'text',  type: 'string' },
    { name: 'switch',  type: 'boolean' },
    { name: 'image', type: 'file', allowedFileTypes: ['jpeg', 'png'] },
    { name: 'exampleList',  type: 'list', subFields: [
        { name: 'text', type: 'string' }

The schema of inputs is as follows:




A unique name for this input that should match the equivalent prop name on your react component



Types correlate to what editing UI should be used to edit this field. Common types include

'longText' // String type but with a multiline text field editor
'richText' // Displays a rich text editor and provides the value as html
'file' // Uploads a file and provides the value as a url string

You can also add custom types here via plugins



An optional default value for this prop. This is useful for showing an example value in the input form when creating a new instance of this component, to better help people using it understand it's purpose



If the input type is "list" you need to include the "subFields" property that is a list of inputs (with this same schema) for each list item



For the "file" input type you typically want to specify what types of files can be uploaded. This is an array that takes content-type files such as:

['jpeg', 'png', 'mp4', 'gif', 'pdf', 'svg']



For any text-based field type, can set a specific set of options taht can be used

['option 1', 'option 2']

Using your components in the editor

To use your components in the editor, make sure you first follow this guide to allow editing and previewing directly on your site

Then, when editing a page in Builder that imports components with the withBuilder function, they will display in your "insert" tab in a "code components" section.

Developing and testing locally

When developing locally, you'll want to update the preview URL in the top right corner of the preview from your production URL to your local development URL.

Note that when developing locally you are mostly likely developing on a non-ssl http:// url within Builder, which is an https:// site. Browsers don't allow https:// sites to make insecure http:// requests unless you explicitly allow it

On chrome, to allow access to your local http URL choose the shield icon on the right side of your URL bar, and then choose "load unsafe scripts". The page will reload and you may have to enter your local URL a second time, but this time chrome will allow it's content to load

Children in custom components

You can also have children within your components (limited to specific child options or any type of child). Note the use of withChildren() below - this will allow this component to have children dropped into it

import { Builder, withChildren } from '';

export const Hero = props =>
  <div className={heroStyles}>{div}</div>

const HeroWithBuilderChildren = withChildren(Hero)

Builder.registerElement(HeroWithBuilderChildren, {
  name: 'Hero',
  // Adding defaults is important for easy usability
  defaultChildren: [
      '@type': '',
      component: { name: 'Text', options: { text: 'I am child text block!' } }

If you want to be fancy and only allow certain types of children, you can do this with childRequirements like in this example

  childRequirements: {
    message: 'You can only put Buttons, Text, or Headings in a Hero',
    query: {
      '': { $in: ['Button', 'Text', 'Heading'] },

Advanced child sub-component use cases

For use-cases where you need multiple sets of children rendered - e.g. making your own custom tabs components, see our built-in tabs component source code here. More examples of component source code with multiple children

▶ Expand code example

👉Tip: You can see a detailed answer to advanced React children use cases with code examples over in our forum!


By default Builder wraps your components in a dom element (by default a div but can be changed) with a few needed attributes and classes for the editor to work as expected.

You can opt out of this wrapping by using the noWrap option. You can see a full code example of this with our built-in form input component here

For sake of example here, if you say wanted to use a Material UI TextField in with noWrap

import { TextField } from '@material-ui/core'

export const BuilderTextField = props => (
  // Important! must add a couple classes and attributes via props.attributes
  // Important! If you add your own classes do it after ...props.attributes 
    className={`my-class ${props.attributes.className}`}

Builder.registerComponent(BuilderTextField, {
  name: 'TextField',
  noWrap: true, // Important!
  inputs: [{ name: 'variant', type: 'string' }]

Components-only mode

Want to limit page building to only your custom code components? Try out components-only mode

Don't use React?

Try using symbols for the same level of functionality and symbols support any framework!

Questions or comments?

Give us a chat, we respond quickly and are here to help!