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26 lines
740 B
TypeScript
26 lines
740 B
TypeScript
/**
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* Generates an absolute URL from a passed in relative url. If url is already absolute,
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* same url is returned. An IIFE is used to ensure that multiple invocations of the function
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* do not create multiple anchor elements that will need to be garbage collected
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* @export
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* @type {(url: string) => string}
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*/
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export const getAbsoluteUrl: (url: string) => string = (() => {
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let anchor: HTMLAnchorElement;
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/**
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* Returned closure function extracts the absolute url from the anchor element
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* in the closure.
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* @param {string} url
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* @returns {string}
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*/
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return (url: string): string => {
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if (!anchor) {
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anchor = document.createElement('a');
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}
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anchor.href = url;
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return anchor.href;
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};
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})();
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