Create a gist now

Instantly share code, notes, and snippets.

What would you like to do?
DOMTokenList supports() example for Preload
var DOMTokenListSupports = function(tokenList, token) {
if (!tokenList || !tokenList.supports) {
return;
}
try {
return tokenList.supports(token);
} catch (e) {
if (e instanceof TypeError) {
console.log("The DOMTokenList doesn't have a supported tokens list");
} else {
console.error("That shouldn't have happened");
}
}
};
// test if preload is supported
var linkSupportsPreload = DOMTokenListSupports(document.createElement("link").relList, "preload");
if (linkSupportsPreload) {
// ...
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment