tsurih
v3.0.6
Published
Svelte form validation library
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1,756
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Tsurih
Svelte form validation library
- Minimalistic 🚐
- Type safe 🛟
- Small size 📦
- Ability to use custom validators ☘️
- Strategies 🎖️
- Helper functions 💪
- Focused on DX ❤️
Example 👇
<script lang="ts">
import { get } from "svelte/store";
import { tsurih, debounce, validators } from "tsurih";
import type { TConfig, TContext } from "tsurih";
const debounced = debounce(() => {
return new Promise<boolean>((res) =>
setTimeout(() => {
console.log("🚂");
res(true);
})
);
}, 2000);
const customValidators = {
debounce: (message?: string) => {
return async (ctx: TContext<any, any, TConfig<any, any>>) => {
const result = await debounced();
const values = get(ctx.config.values);
if (!result) {
// ❌ Error
return message || "Field is not valid";
}
// ✅ Success
return "";
};
},
};
const form = tsurih({
field1: true,
field2: "",
})
.setSchema({
field1: [validators.required()],
field2: [
validators.required(),
(ctx) => {
const values = get(ctx.config.values);
if (!values.field1) {
// ❌ Error
return "Field is not valid";
}
// ✅ Success
return "";
},
customValidators.debounce(),
],
})
.setStrategy("blur");
$: watchOnlyField1 = $values.field1;
$: {
watchOnlyField1;
form.revalidate("field2");
}
const { errors, isSubmitting, values } = form;
</script>
<form
use:form.reg
on:submit="{form.onSubmit((values) => {
console.log(values);
})}"
>
<input
type="checkbox"
bind:checked="{$values.field1}"
name="{form.fields.field1}"
/>
{#if $errors.field1}
<span>{$errors.field1}</span>
{/if}
<input bind:value="{$values.field2}" name="{form.fields.field2}" />
{#if $errors.field2}
<span>{$errors.field2}</span>
{/if}
{#if $isSubmitting}
Submitting...
{/if}
<button type="submit">Submit</button>
</form>
☘️ tsurih also provides validators, isString, isNumber, isArray, isObject, debounce utilities
☘️ "validators" utility which has standard min, max, required, regexp, optionalMin, optionalRegexp.
☘️ An additional validator "optional" is not needed as all default fields are optional. But if you, for example, want min or regexp to be checked only if a value is present, use optionMin or optionalRegexp . If you are writing your own validator which should be optional, then it should have an if(!ctx.value) return "" condition
Author
Released under the MIT License.