67 lines
1.8 KiB
JavaScript
67 lines
1.8 KiB
JavaScript
// MIT License
|
|
// From: https://github.com/uupaa/dynamic-import-polyfill/blob/master/importModule.js
|
|
|
|
function toAbsoluteURL(url) {
|
|
const a = document.createElement("a");
|
|
a.setAttribute("href", url); // <a href="hoge.html">
|
|
return a.cloneNode(false).href; // -> "http://example.com/hoge.html"
|
|
}
|
|
|
|
// My own addition
|
|
export function importScript(url) {
|
|
return new Promise((resolve, reject) => {
|
|
const script = document.createElement("script");
|
|
const destructor = () => {
|
|
script.onerror = null;
|
|
script.onload = null;
|
|
script.remove();
|
|
script.src = "";
|
|
};
|
|
script.defer = "defer";
|
|
script.onerror = () => {
|
|
reject(new Error(`Failed to import: ${url}`));
|
|
destructor();
|
|
};
|
|
script.onload = () => {
|
|
resolve(window[vector]);
|
|
destructor();
|
|
};
|
|
script.src = url;
|
|
|
|
document.head.appendChild(script);
|
|
});
|
|
}
|
|
|
|
export function importModule(url) {
|
|
return new Promise((resolve, reject) => {
|
|
const vector = "$importModule$" + Math.random().toString(32).slice(2);
|
|
const script = document.createElement("script");
|
|
const destructor = () => {
|
|
delete window[vector];
|
|
script.onerror = null;
|
|
script.onload = null;
|
|
script.remove();
|
|
URL.revokeObjectURL(script.src);
|
|
script.src = "";
|
|
};
|
|
script.defer = "defer";
|
|
script.type = "module";
|
|
script.onerror = () => {
|
|
reject(new Error(`Failed to import: ${url}`));
|
|
destructor();
|
|
};
|
|
script.onload = () => {
|
|
resolve(window[vector]);
|
|
destructor();
|
|
};
|
|
const absURL = toAbsoluteURL(url);
|
|
const loader = `import * as m from "${absURL}"; window.${vector} = m;`; // export Module
|
|
const blob = new Blob([loader], { type: "text/javascript" });
|
|
script.src = URL.createObjectURL(blob);
|
|
|
|
document.head.appendChild(script);
|
|
});
|
|
}
|
|
|
|
export default importModule;
|