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chore: [Idle detection] Deal with users on systems that don't handle emoji (#2941)

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* Deal with users on systems that don't handle emoji

* Leave no trailing space

* Move function to utils, and actually call it 🤣
Chapeau, TypeScript!

* Use grinning face instead of koala

* Tweak globalAlpha
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Thomas Steiner 2021-02-05 18:34:35 +01:00 • committed by GitHub
parent 6aa22bada8
commit 1a67642fd1
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2 changed files with 39 additions and 9 deletions
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17
src/utils.ts
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@ -369,3 +369,20 @@ export const getVersion = () => {
DEFAULT_VERSION
);
};
// Adapted from https://github.com/Modernizr/Modernizr/blob/master/feature-detects/emoji.js
export const supportsEmoji = () => {
const canvas = document.createElement("canvas");
const ctx = canvas.getContext("2d");
if (!ctx) {
return false;
}
const offset = 12;
ctx.fillStyle = "#f00";
ctx.textBaseline = "top";
ctx.font = "32px Arial";
// Modernizr used 🐨, but it is sort of supported on Windows 7.
// Luckily 😀 isn't supported.
ctx.fillText("😀", 0, 0);
return ctx.getImageData(offset, offset, 1, 1).data[0] !== 0;
};