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karpolan/getMetaTagContent.ts

Last active May 19, 2021 09:11
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TypeScript - testing <head> meta tags
Raw
getMetaTagContent.ts
function getMetaTagContent(metaTagName: string): string | null {
const metaTags: HTMLCollectionOf<HTMLMetaElement> = document.getElementsByTagName('meta');
const nameToFind = metaTagName.toLowerCase();
for (const current of metaTags) {
if (current.getAttribute('name')?.toLowerCase() === nameToFind) {
return current.getAttribute('content');
}
}
return '';
}
/*
How to use:
// Check Real DOM elements
waitFor(() => {
expect(document.title).toEqual('title...');
expect(getMetaTagContent('description')).toEqual('description...');
});
*/
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