47 lines
1.1 KiB
TypeScript
47 lines
1.1 KiB
TypeScript
function flunk() {
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// DO NOT USE i18next here.
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// IE Cannot handle it.
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const READ_THE_COMMENT_ABOVE = "This app only works with modern browsers.";
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alert(READ_THE_COMMENT_ABOVE);
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window.location.assign("https://www.google.com/chrome/");
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}
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const REQUIRED_GLOBALS = [
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"Promise",
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"console",
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"WebSocket",
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"Intl",
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"Set",
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];
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const REQUIRED_ARRAY_METHODS = [
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"includes",
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"map",
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"filter",
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];
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/** We don't support IE. This method stops users from trying to use the site.
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* It's unfortunate that we need to do this, but the site simply won't work on
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* old browsers and our error logs were getting full of IE related bugs. */
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export function stopIE() {
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try {
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// Can't use Array.proto.map because IE.
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// Can't translate the text because IE (no promises)
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for (let i = 0; i < REQUIRED_GLOBALS.length; i++) {
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if (!window.hasOwnProperty(REQUIRED_GLOBALS[i])) {
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flunk();
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}
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}
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for (let i = 0; i < REQUIRED_ARRAY_METHODS.length; i++) {
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if (!Array.prototype.hasOwnProperty(REQUIRED_ARRAY_METHODS[i])) {
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flunk();
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}
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}
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if (!Object.entries) { flunk(); }
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} catch (error) {
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flunk();
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}
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}
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