vanillajs-browser-helpers
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Collection of convenience code snippets (helpers) that aims to make it a little easier to work with vanilla JS in the browser
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text/typescript
import { appendFrame, createDetachedDocument } from './assets/helpers';
import isDOMContainer from '../isDOMContainer';
describe('"isDOMContainer"', () => {
describe('Returns `true` for', () => {
describe.each([
['<html> element', (doc: Document) => doc.documentElement],
['<body> element', (doc: Document) => doc.body],
['<p> element', (doc: Document) => doc.createElement('p')],
['Fragment', (doc: Document) => doc.createDocumentFragment()]
])('%s', (_, getElm) => {
it('In the current document', () => {
expect(isDOMContainer(getElm(document))).toBe(true);
});
it('In a Frame', () => {
const frame = appendFrame();
expect(isDOMContainer(getElm((frame.contentDocument as Document)))).toBe(true);
frame.remove();
});
it('A DOM Node in a detached Document', () => {
const doc = createDetachedDocument();
expect(isDOMContainer(getElm(doc))).toBe(true);
});
});
});
describe('Returns `false` for', () => {
it.each([
['Document', document],
['Comment Node', document.createComment('')],
['Text Node', document.createTextNode('')],
['Window', window],
['NULL', null],
['Object', {}]
])('%s', (_, elm) => {
expect(isDOMContainer(elm)).toBe(false);
});
});
});