lit-html
Version:
33 lines (31 loc) • 562 B
JavaScript
/**
* @license
* Copyright 2021 Google LLC
* SPDX-License-Identifier: BSD-3-Clause
*/
/**
* Returns an iterable containing the result of calling `f(value)` on each
* value in `items`.
*
* @example
*
* ```ts
* render() {
* return html`
* <ul>
* ${map(items, (i) => html`<li>${i}</li>`)}
* </ul>
* `;
* }
* ```
*/
function* map(items, f) {
if (items !== undefined) {
let i = 0;
for (const value of items) {
yield f(value, i++);
}
}
}
export { map };
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