刘宇飞
6e0a1fbcbb
Includes scratch-gui, scratch-vm, scratch-blocks, scratch-render, scratch-l10n, and deployment config. Co-authored-by: Cursor <cursoragent@cursor.com>
21 lines
621 B
JavaScript
21 lines
621 B
JavaScript
/* eslint-disable no-eval */
|
|
|
|
/**
|
|
* @returns {boolean} true if the nullish coalescing operator (x ?? y) is supported.
|
|
* See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing_operator
|
|
*/
|
|
const supportsNullishCoalescing = () => {
|
|
try {
|
|
// eslint-disable-next-line no-unused-vars
|
|
const fn = new Function('undefined ?? 3');
|
|
// if function construction succeeds, the browser understood the syntax.
|
|
return true;
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
};
|
|
|
|
module.exports = {
|
|
supportsNullishCoalescing: supportsNullishCoalescing()
|
|
};
|