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TypeScript helps us catch a particular type of problem around the use of object literals. Let’s look at the situation where the error arises: // @erro 阅读全文
posted @ 2022-07-25 16:15
Zhentiw
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If<C, T, F> Implement a type that evaluates to T if the type C is true or F if C is false. // Implement this type type If<C, T, F> = C extends true ? 阅读全文
posted @ 2022-07-21 15:02
Zhentiw
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Union type: means "one of" those types Intersection type: means "combination" of those types Intersection types type typeAB = typeA & typeB; interface 阅读全文
posted @ 2022-07-19 16:51
Zhentiw
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Res1: https://www.typescript-training.com/course/making-typescript-stick/08-type-challenges/#returnoff Res2: https://learntypescript.dev/09/l2-conditi 阅读全文
posted @ 2022-07-19 16:24
Zhentiw
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`any` type, you can assign any value for any type. For `unkown`, you can also assign any value to unkwon: But you cannot assign unkwon variable to ano 阅读全文
posted @ 2022-07-19 02:27
Zhentiw
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Key Terms Availability The odds of a particular server or service being up and running at any point in time, usually measured in percentages. A server 阅读全文
posted @ 2022-07-17 20:19
Zhentiw
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https://btholt.github.io/complete-intro-to-realtime/socketio https://btholt.github.io/complete-intro-to-realtime/intro-to-websockets Socket.io: FE: co 阅读全文
posted @ 2022-07-15 21:27
Zhentiw
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https://btholt.github.io/complete-intro-to-realtime/intro-to-http2-push long-running HTTP call HTTP2 PUSH FE: async function getNewMsgs() { let reader 阅读全文
posted @ 2022-07-15 19:43
Zhentiw
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Polling with setTimeout async function getNewMsgs() { let json; try { const res = await fetch("/poll"); json = await res.json(); } catch (e) { // back 阅读全文
posted @ 2022-07-15 19:10
Zhentiw
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const $: any = {} /** * Get the <button> element with the class 'continue' * and change its HTML to 'Next Step...' */ $("button.continue").html("Next 阅读全文
posted @ 2022-07-15 15:56
Zhentiw
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