next
Version:
The React Framework
41 lines (40 loc) • 1.46 kB
JavaScript
// This regex will have fast negatives meaning valid identifiers may not pass
// this test. However this is only used during static generation to provide hints
// about why a page bailed out of some or all prerendering and we can use bracket notation
// for example while `ಠ_ಠ` is a valid identifier it's ok to print `searchParams['ಠ_ಠ']`
// even if this would have been fine too `searchParams.ಠ_ಠ`
const isDefinitelyAValidIdentifier = /^[A-Za-z_$][A-Za-z0-9_$]*$/;
export function describeStringPropertyAccess(target, prop) {
if (isDefinitelyAValidIdentifier.test(prop)) {
return "`" + target + "." + prop + "`";
}
return "`" + target + "[" + JSON.stringify(prop) + "]`";
}
export function describeHasCheckingStringProperty(target, prop) {
const stringifiedProp = JSON.stringify(prop);
return "`Reflect.has(" + target + ", " + stringifiedProp + ")`, `" + stringifiedProp + " in " + target + "`, or similar";
}
export const wellKnownProperties = new Set([
'hasOwnProperty',
'isPrototypeOf',
'propertyIsEnumerable',
'toString',
'valueOf',
'toLocaleString',
// Promise prototype
// fallthrough
'then',
'catch',
'finally',
// React Promise extension
// fallthrough
'status',
// React introspection
'displayName',
// Common tested properties
// fallthrough
'toJSON',
'$$typeof',
'__esModule'
]);
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