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Add is.url

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Itai Steinherz 2018-12-07 07:19:18 +02:00
parent 9df6f4ebe9
commit 1ecd9367b2
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source/index.ts
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@ -189,6 +189,19 @@ namespace is { // tslint:disable-line:no-namespace
export const directInstanceOf = <T>(instance: unknown, klass: Class<T>): instance is T => Object.getPrototypeOf(instance) === klass.prototype;
export const urlInstance = (value: unknown): value is URL => isObjectOfType<URL>(TypeName.URL)(value);
export const url = (value: unknown) => {
if (!string(value)) {
return false;
}
try {
new URL(value); // tslint:disable-line no-unused-expression
return true;
} catch (_) { // tslint:disable-line no-unused
return false;
}
};
export const truthy = (value: unknown) => Boolean(value);
export const falsy = (value: unknown) => !value;