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- /**
- * Loads a JavaScript file from the given URL and executes it.
- *
- * @param {string} url Address of the .js file to load
- * @param {function} callback Method to invoke when the script
- * has loaded and executed
- */
- export const loadScript = (url: string, callback?: (error?: Error) => void) => {
- const script = document.createElement('script');
- script.type = 'text/javascript';
- script.async = false;
- script.defer = false;
- script.src = url;
- if (typeof callback === 'function') {
- // Success callback
- script.onload = (event: Event) => {
- if (event.type === 'load') {
- // Kill event listeners
- script.onload = script.onerror = null;
- callback();
- }
- };
- // Error callback
- script.onerror = (err: Event | string) => {
- // Kill event listeners
- script.onload = script.onerror = null;
- callback(new Error('Failed loading script: ' + script.src + '\n' + err));
- };
- }
- // Append the script at the end of <head>
- const head = document.querySelector('head');
- if (head) {
- head.insertBefore(script, head.lastChild);
- }
- };
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