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This should test your understanding of falsy and truthy numbers in JavaScript 👇 |
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Featured content |
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JavaScript has come a long way in the past 10 years with brand new feature upgrades in each one. |
Let's look at the 5 most significant features that arrived in ES9; and see the ones you missed. |
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Async generators was a powerful one from ES9. |
Just like normal generators but now it pops out the values after asynchronous work like a network request or something: |
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So when we call .next() we'll get a Promise: |
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It's such a powerful tool for streaming data in web app in a structured + readable manner — just look at this function that buffers and streams data for a video-sharing app like YouTube: |
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And now to consume this generator we'll use for await of -- async iteration: |
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I wonder if the actual YouTube JavaScript code uses generators like this? |
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When I use String.raw I'm saying: Just give me what I give you. Don't process anything. |
Leave those escape characters alone: |
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No more escaping backslashes: |
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We can write: |
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Perfect for writing regexes with a stupid amount of these backslashes: |
Something like this but much worse: |
From this✅: |
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To this ✅: |
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So "raw" as in unprocessed. |
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It's one of those "cool" things you can do in JavaScript that are immensely powerful when put to good use. |
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A is ongoing but the user wants to do B but A needs to happen first. |
Example: Social app where users can create, save, and publish posts. Like Medium. |
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What if the user wants to publish the post when it's saving? |
Solution: Ensure the post saves before publishing happens, by resolving promise from outside. |
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Don't let the bugs byte,
Tari Ibaba |
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