const handler = { get: function(obj, prop) { return prop in obj ? obj[prop] : 37; } }; const p = new Proxy({}, handler); p.a = 1; p.b = undefined; console.log(p.a, p.b); // 1, undefined cons...

// Early JS environments return '[object Object]' for null, so it's best to directly check for it.... Portions of this content are ©1998–2022 by individual mozilla.org contributors. Conten...

return true; } return false; } if (!showViewLiveResultButton()) { function typedArrayToURL(... Portions of this content are ©1998–2023 by individual mozilla.org contributors. Conten...