Next JS Gravity Forms Component

A plug and play component for parsing GraphQL Gravity Form data. Outputs a component using BEM classes, meaning all you need to do is style it.

To be used alongside wp-graphql-gravity-forms (version 0.12.0 up).

Uses React Hook Forms under the hood for all that good state management.

Installation

either:

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``shell
yarn add next-gravity-forms
`

or

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`shell
npm i next-gravity-forms
`

How To Use

Add the env variable to your project: NEXT_PUBLIC_WORDPRESS_API_URL. Add your domain to it. i.e.
NEXT_PUBLIC_WORDPRESS_API_URL=https://www.YOURWPSITE.com/graphql.

This variable is called internally by the getGravityForm function.

Import the component and use it with the API function. Select the required form using its databaseId.

`js
import GravityFormForm from "next-gravity-forms";
import { getGravityForm } from "next-gravity-forms/server";

const data = await getGravityForm(1);

return ;
`

The GraphQL endpoint can also be passed using the baseUrl prop, which if set is used instead of the NEXT_PUBLIC_WORDPRESS_API_URL env variable.

`js
const baseUrl = process.env.NEXT_PUBLIC_WORDPRESS_API_URL;

return ;
`

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This package can be used with any React project. We just named it Next, because we use it with Next projects.

To allow it to be flexible, we have added a number of arguments to the main component.

`js
const GravityFormForm = ({
data,
presetValues = () => {},
successCallback = () => {},
errorCallback = {},
navigate,
helperText = {}
customFormFields = {}
})

`

- data: The form data needed to create the form. Got via getGravityForm query.
- presetValues: Any preset values needed to pass in - see below.
- successCallback: Function that is called when form is successul.
- errorCallback: Function that is called when the form errors.
- navigate: Function that is called with URL for redirecting the user.
- helperText: Object with values to override strings - see the Translation section.
- customFormFields: Object that allows you to override form fields. See the Custom Form Fields section.

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If you are wanting to use a provider like Stellate to cache your form queries, pass the Stellate URL to NEXT_PUBLIC_WORDPRESS_API_URL.

You will then need to pass in a clean URL for the form to submit. This can be passed in with NEXT_PUBLIC_WORDPRESS_FORM_SUBMIT_URL.

Note: If NEXT_PUBLIC_WORDPRESS_FORM_SUBMIT_URL is not passed in, it will fall back to NEXT_PUBLIC_WORDPRESS_API_URL.

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Sometimes you will want to conditionally set default values, or pass in data to hidden fields. This could be values for a user ID, or a current page.

This is handled by the presetValues prop.
In addition, you need to pass your query parameters within this prop to make dynamically populating field work. Good to know that the query string takes priority over the field name parameter.

`js
data={form}
presetValues={{ ...queryParams, input_2: "My preset value" }}
/>
`

In the above example input_2 corresponds to the 2nd field added in the WordPress Gravity Forms edit page. This value can be found by clicking on the field and looking at the top right just under Field Settings.

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Since package uses some hardcoded strings, we implemented the way how to translate them to your preferable text.
helperText prop should be used to override it. You can find all possible strings here. You can handle your own translations by passing in different strings depending on what is needed, and they will be merged with the existing ones. Alternatively, you can pass an entire object with translations for all strings. See the example below:

`js
data={form}
helperText={{
errors: {
general: "There was a problem with your submission. Check errors",
leastOneField: "At least one field must be filled out.",
required: "Field is required.",
pattern: {
email: "The email address is invalid",
phone: "This is an invalid phone",
},
},
radio: {
otherChoice: "Other", // alternatively you can override only specific field, .i.e. otherChoice_3
},
}}
/>
`

WordPress Backend Not Allowing Submission

Having CORS issues?

Add the following snippet of code to your WordPress functions.php file.

Make sure to update the 'https://yourfrontendurl.com' to your actual frontend. With no trailing slash.

`
add_filter( 'graphql_response_headers_to_send', function( $headers ) {
return array_merge( $headers, [
'Access-Control-Allow-Origin' => 'https://yourfrontendurl.com',
'Access-Control-Allow-Methods' => 'POST, GET, OPTIONS, PUT, DELETE',
'Access-Control-Allow-Credentials' => 'true'
] );
} );
`

Implementing Google reCAPTCHA

On your WordPress backend within the Gravity Forms settings set up reCaptcha. Follow the instructions provided by Gravity Forms.

File Upload

To enable file uploading functionality, your GraphQL server must support the Upload scalar type. In WordPress, this can be easily achieved by installing the WP GraphQL Upload plugin.

If you attempt to add a file upload field to your form without support for the Upload scalar type, your API will return an error. Ensure that your GraphQL server is properly configured to handle file uploads by integrating the WP GraphQL Upload plugin or another equivalent solution that provides support for the Upload type.

If using the WP GraphQL Upload plugin, the following filter also needs to be added to allow the multipart/form-data content type.

`
add_filter( 'graphql_is_valid_http_content_type', function( $is_valid, $content_type ) {

if ( 0 === stripos( $content_type, 'multipart/form-data' ) ) {
return true;
}

return $is_valid;

}, 10, 2 );
`

When enabling the Enable Multi-File Upload option, it's important to note that files are not uploaded immediately upon being dropped into the upload area. Instead, all files are uploaded together during the form submission process. However, be aware that this can introduce a delay, particularly when users upload large files. Might be good to show spinner while uploading.

Date field

The Date Picker functionality in our form utilizes the react-datepicker package. Please note that this package does not include default styles. To ensure proper styling of the date picker, you must either provide your own custom styles or import the default styles from the package. To use the default styles, include the following import statement in your code:

`javascript
import "react-datepicker/dist/react-datepicker.css";
`

Additionally, our component allows you to customize the settings of the DatePicker through the helperFieldsSettings prop. This is particularly useful for setting constraints like the maximum year. For instance, to set the maximum year to 2024, you would configure the prop as follows:

`
data={form}
helperFieldsSettings={{
date: {
dateMaxYear: 2024
},
}}
/>
`

For a complete list of customizable options for the DatePicker, refer to the fieldsSettings.js file available in our repository: fieldsSettings.js.

Number field

As you probably know, the Number field has an option to set the currency format. By default, we support only EUR, USD, and GBP currencies. If you would like to add a custom currency, other than set it by gform_currency filter, you also need to pass it as a prop using the helperFieldsSettings prop, as follows:

`
data={form}
helperFieldsSettings={{
number: {
currencies: {
HKD: {
symbol_left: "HK$",
symbol_right: "",
symbol_padding: "",
thousand_separator: ",",
decimal_separator: ".",
decimals: 2,
}
}
},
}}
/>
`

🔧 Exposed Methods

This component exposes several react-hook-form methods via a ref to allow advanced and flexible form management:

- setError(name, error) — Set an error for a specific field.
- reset() — Reset the form to its initial state.
- getValues(name?) — Get the current value of a specific field or all form values.
- setValue(name, value) — Programmatically set the value of a field.
- watch(name?) — Get the current value of a specific field or all values.
- resetField(name) — Reset field value.
⚠️ Note: watch() is not reactive when used via ref. See subscriptions below to react to changes.

`jsx
const GravityForm = ({ data }) => {
const formRef = useRef();

const handleReset = () => formRef.current.reset();
const handleSetValue = () =>
formRef.current.setValue("exampleField", "new value");

return (



);
};
export default GravityForm;
`

---

📡 Subscriptions

To reactively track field changes, we provide subscription methods that allow parent components to listen for updates.

> 🧠 Why use subscriptions?
> Calling watch() via a ref only gives you the current value once and does not update when the form changes.
> To react to value changes, you need to subscribe using the form's internal observer.

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Subscribes to changes of a specific field and calls the callback when that field's value changes.

`jsx
useEffect(() => {
const unsubscribe = formRef.current.subscribeToField(
"input_1",
(newValue) => {
console.log(newValue);
}
);
return unsubscribe;
}, []);
`

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Subscribes to changes in any form field. The provided callback is called with the latest form values whenever any field changes.

`jsx
const unsubscribe = ref.current.subscribeToAllValues((values) => {
console.log("Form values changed:", values);
});
`

Custom Form Fields

You can override the markup of specific fields by passing custom components via the customFormFields prop. This is necessary because the gform_field_content hook does not apply when using this package.

`jsx
data={form}
customFormFields={{
1: CustomInputComponent,
2: IbanComponent,
}}
/>
`

Each key corresponds to the field ID you want to override.

---

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`jsx
const CustomInputComponent = ({ value, onChange, onBlur, ...rest }) => {
return (
type="text"
value={value}
onChange={onChange}
onBlur={onBlur}
{...rest}
/>
);
};
`

Your component must behave like a controlled field and return values in the same format as the default input.

---

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You can optionally define validation rules using a static validation property on your component.

#### Static Validation

`jsx
CustomInputComponent.validation = {
rules: {
required: "This field is required.",
maxLength: { value: 20, message: "Max 20 characters." },
},
};
`

#### Dynamic Validation

`jsx
IbanComponent.validation = ({ fieldData }) => ({
rules: {
required: fieldData?.required ? "IBAN is required." : false,
validate: (value) => {
const stripped = value.replace(/[\s_]/g, "");
if (!stripped) return true;
return IBANValidator.isValid(stripped) || "Invalid IBAN";
},
},
defaultValue: "",
});
`

If validation is a function, it will be called with field-related props such as fieldData.

Testing & Developing

Firstly, yes please! Any help would be great.

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There are a few steps to get a dev enviroment set up.

- Clone repo
- Clone https://github.com/robmarshall/next-gravity-forms-example to a different location
- Remove the next-gravity-forms package from the above example repo package.json
- Install packages on example repo
- Navigate into your local "next-gravity-forms" root.
- Install packages
- Build it using "yarn build"
- Navigate into the /dist folder and run yarn link
- Navigate back to the example repo root and run yarn link "next-gravity-forms"

You should now be able to run the example repo and see the dev form package running.

Currently whenever you make a change you will need to re-run yarn build. A hot-reload is yet to be added.

To Do

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- [x] Input
- [x] Textarea
- [x] Select
- [x] Multiselect
- [x] Number
- [x] Checkbox
- [x] Radio
- [x] Hidden
- [x] HTML
- [x] Captcha
- [x] Add masking to inputs
- [x] Section
- [x] Name
- [ ] Page (half done, need to save values so that when the user refreshes the page, they are preserved)
- [x] Date
- [x] File upload
- [ ] Post Fields
- [ ] Pricing Fields
- [x] Phone (doesn't support custom phone type)
- [x] Email
- [x] Consent
- [x] Website
- [x] Password
- [x] Time
- [ ] Address
- [ ] Configure error message (currently just 'An Unknown Error Occurred')
- [ ] Integrate Success/Failure Handler from previous plugin

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- [x] Honeypot
- [ ] Save and Continue
- [x] Add submit/error callback for custom use

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- [x] Input
- [x] Textarea
- [x] Select (half done, need to add default values)
- [x] Multiselect
- [x] Number
- [x] Checkbox (half done, need to add default values)
- [x] Radio (half done, need to add default values)
- [ ] Hidden
- [x] HTML
- [ ] Captcha
- [x] Consent
- [x] Website
- [x] Phone
- [x] Page
- [x] Date
- [] Password (almost done, test can be tweaked)

Confirmations

- [x] Text Confirmation ({all_fields} is not supported)
- [ ] Page Change
- [x] Redirect
- [x] Redirect query strings support only form fields (excluding file uploads) and do not support user/entry-related fields (e.g., User IP, entry ID)
- [x] Conditional Logic

Known Issues

- [ ] Invalid phone number results in failed submission w/ non-descript general error message.
- [ ] Setting the Submit Button Location to 'End of the Last Row' causes a fetch API error, as GraphQL doesn't support it yet.
- [ ] Password confirmation doesn't work with wp-graphql-gravity-forms version 0.13.0.1 and earlier. To fix this, add a copy of the general password value as the input_2 value in the $\_POST submission.
- [ ] Address field with a configured Default State or Default Province cause GraphQL error or incorrect values.

`

``