stylus/js/script-loader.js
2017-09-01 14:36:13 +08:00

35 lines
859 B
JavaScript

'use strict';
// eslint-disable-next-line no-var
var loadScript = (function () {
const cache = new Map();
return function (path) {
if (!path.includes('://')) {
path = chrome.runtime.getURL(path);
}
return new Promise((resolve, reject) => {
if (cache.has(path)) {
resolve(cache.get(path));
return;
}
const script = document.createElement('script');
script.src = path;
script.onload = () => {
resolve(script);
script.onload = null;
script.onerror = null;
cache.set(path, script);
};
script.onerror = () => {
reject(new Error(`failed to load script: ${path}`));
script.onload = null;
script.onerror = null;
script.parentNode.removeChild(script);
};
document.head.appendChild(script);
});
};
})();