@vaadin/hilla-models/Model.js

Generative form models for Hilla

export const nothing = Symbol('nothing');
const detachedTarget = Object.create({
    toString: () => ':detached:',
}, {
    model: { value: undefined },
    value: { value: nothing },
});
export const $key = Symbol('key');
export const $name = Symbol('name');
export const $owner = Symbol('owner');
export const $meta = Symbol('meta');
export const $optional = Symbol('optional');
export const $defaultValue = Symbol('defaultValue');
export const $constraints = Symbol('constraints');
export const $members = Symbol('members');
export const $assertSupportedModel = Symbol('assertSupportedModel');
export const Model = Object.create(null, {
    [$key]: {
        value: 'model',
    },
    [$name]: {
        value: 'unknown',
    },
    [$owner]: {
        value: detachedTarget,
    },
    [$meta]: {},
    [$optional]: {
        value: false,
    },
    [$defaultValue]: {},
    [$constraints]: {
        value: [],
    },
    [Symbol.toStringTag]: {
        get() {
            return this[$name];
        },
    },
    [Symbol.hasInstance]: {
        value(o) {
            return typeof o === 'object' && o != null && (this === o || Object.prototype.isPrototypeOf.call(this, o));
        },
    },
    toString: {
        value() {
            return `[${String(this[$owner])} / ${String(this[$key])}${this[$optional] ? '?' : ''}] ${this[$name]}`;
        },
    },
});
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