For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.
samthor
/ eventlistener-signal-support.js
Last active
January 21, 2025 06:15
Polyfill/code for the signal argument to addEventListener
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| // This is part of the blog post here: https://whistlr.info/2022/abortcontroller-is-your-friend/ | |
| // ...and can be used to detect/polyfill the `signal` argument to addEventListener. | |
| // | |
| // Note that at writing, 86%+ of active browsers already support it: | |
| // https://caniuse.com/mdn-api_eventtarget_addeventlistener_options_parameter_options_signal_parameter | |
| // ...but that 92% of browsers support `AbortController` and signal. | |
| // | |
| // So there's 6% of total browsers which will fail silently when adding the `signal` argument. | |
| // Eyeballing it, this is mostly Safari 11-15 and Chrome 66-90. These snippets can help with those targets. | |
| // |
