SolidJS•16mo ago

How to create a generic Input when passing prop `class` to override styles?

Hi, I'm trying to create a generic input. I'm using Tailwindcss for the styling with cva (class-variance-authority) which allows me to create variants. I want to allow users to pass class to override the input. I have this component:

import { JSX, mergeProps } from 'solid-js';
import { VariantProps } from 'class-variance-authority';
import { inputStyles } from './inputStyles';

export type InputProps = JSX.InputHTMLAttributes<HTMLInputElement> &
  JSX.InputHTMLAttributes<HTMLLabelElement> &
  VariantProps<typeof inputStyles>;

export const Input = (props: InputProps) => {
  const merged = mergeProps({ type: 'text' }, props);
  const { size = 'md', ...inputProps } = merged;
  return (
    <div class="flex flex-col">
      <label class="text-gray-400" for={props.id}>
        {props.placeholder}
      </label>
      <input class={`${inputStyles({ size })} ${props.class}`} {...inputProps} />
    </div>
  );
};

import { JSX, mergeProps } from 'solid-js';
import { VariantProps } from 'class-variance-authority';
import { inputStyles } from './inputStyles';

export type InputProps = JSX.InputHTMLAttributes<HTMLInputElement> &
  JSX.InputHTMLAttributes<HTMLLabelElement> &
  VariantProps<typeof inputStyles>;

export const Input = (props: InputProps) => {
  const merged = mergeProps({ type: 'text' }, props);
  const { size = 'md', ...inputProps } = merged;
  return (
    <div class="flex flex-col">
      <label class="text-gray-400" for={props.id}>
        {props.placeholder}
      </label>
      <input class={`${inputStyles({ size })} ${props.class}`} {...inputProps} />
    </div>
  );
};

Ant then I call the component like so

<Input placeholder="Password" size="md" class="text-pink-300" type="password" />

<Input placeholder="Password" size="md" class="text-pink-300" type="password" />

The problem here is that if I try to extract class from props const { size, class, ...inputProps } = merged; I get an error: Unexpected keyword 'class'. I know that class is a reserved word in JavaScript. However, if I try to use className then I get this error: Property 'className' does not exist on type { ... }; Is there a way to pass a class or should I rename the prop as something else?

3 Replies

Max•16mo ago

Hi you can extract class by renaming it

  const { size = "md", class: userClass, ...inputProps } = merged;

  const { size = "md", class: userClass, ...inputProps } = merged;

then pass it like normal

<input class={`${inputStyles({ size })} ${userClass}`} {...inputProps} />

<input class={`${inputStyles({ size })} ${userClass}`} {...inputProps} />

But you still will have problem with reactivity if you destructure props like that, same with size=md should be in mergeProps. You can use built in solid helper something like this

  const merged = mergeProps({ type: "text", size: "md" }, props);
  const [selectedProps, restInputProps] = splitProps(merged, ["class", "size"]);

  const merged = mergeProps({ type: "text", size: "md" }, props);
  const [selectedProps, restInputProps] = splitProps(merged, ["class", "size"]);

then when rendering

      <input
        class={`${inputStyles({ size: selectedProps.size })} ${
          selectedProps.class
        }`}
        {...restInputProps}
      />

      <input
        class={`${inputStyles({ size: selectedProps.size })} ${
          selectedProps.class
        }`}
        {...restInputProps}
      />

hel.io•16mo ago

Hi @maxoucsgo, Thank you very much for your reply. I didn't know about splitProps , this solved my problem.

Max•16mo ago

Nice! np

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How to create a generic Input when passing prop `class` to override styles?