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[Breaking Change] Make 'is' type-safe.

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This commit is contained in:
Bjorn Stromberg 2020-06-21 01:08:36 +09:00
parent 1ffe2fb6a7
commit b0b33a07d6
2 changed files with 23 additions and 14 deletions
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15
source/index.ts
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@ -66,6 +66,10 @@ const objectTypeNames = [
type ObjectTypeName = typeof objectTypeNames[number];
function isObjectTypeName(name: unknown): name is ObjectTypeName {
return objectTypeNames.includes(name as ObjectTypeName);
}
const primitiveTypeNames = [
'null',
'undefined',
@ -100,9 +104,14 @@ function isOfType<T extends Primitive | Function>(type: PrimitiveTypeName | 'fun
const {toString} = Object.prototype;
const getObjectType = (value: unknown): ObjectTypeName | undefined => {
const objectName = toString.call(value).slice(8, -1);
if (objectName) {
return objectName as ObjectTypeName;
const objectTypeName = toString.call(value).slice(8, -1);
if (/HTML\w+Element/.test(objectTypeName) && is.domElement(value)) {
return 'HTMLElement';
}
if (isObjectTypeName(objectTypeName)) {
return objectTypeName;
}
return undefined;