Well even though most browsers are fairly unified today, there are still some differences that will cause your code to not work exactly across all platforms. It's important to check that functionality is available per browser.
I like to refer to caniuse.com which is very clear on what browser support what functionality. It's why I only got serious about Javascript in the last 5 years but I've been developing for 24 years now. lol. Back in the day I just couldn't deal with the huge differences between browsers. It drove me crazy.
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So Safari is the new IE?
I didn't had to maintain production-level front-end JS in the last ~4yrs, from the outside the browser-compatibility seems resolved, kind of.
Well even though most browsers are fairly unified today, there are still some differences that will cause your code to not work exactly across all platforms. It's important to check that functionality is available per browser.
I like to refer to caniuse.com which is very clear on what browser support what functionality. It's why I only got serious about Javascript in the last 5 years but I've been developing for 24 years now. lol. Back in the day I just couldn't deal with the huge differences between browsers. It drove me crazy.