Zhentiw - 博客园

2020年4月15日

[ARIA] Define a Live Region to Ensure Dynamic Changes are Announced by Assistive Technologies

摘要： When dynamic changes occur to content on a page they are usually visually apparent to users who can see the page but may not be made apparent to users 阅读全文

posted @ 2020-04-15 14:32 Zhentiw 阅读(115) 评论(0) 推荐(0)

[ARIA] Define Images with Appropriate Text Alternatives

摘要： Images must have text alternatives that describe the information or function represented by them so they can be read and understood by those using scr 阅读全文

posted @ 2020-04-15 02:03 Zhentiw 阅读(121) 评论(0) 推荐(0)

[Javascript] Javascript numeric separators

摘要： Big or non decimal numbers are sometimes hard to read inside code. Numeric separators are now part of the javascript specification and allow us to mak 阅读全文

posted @ 2020-04-15 01:57 Zhentiw 阅读(392) 评论(0) 推荐(0)

2020年4月11日

[RxJS] Extend Promises by Adding Custom Behavior

摘要： We will create a Promise wrapper, that can be used instead of normal promises, to track different tasks that we need to show the spinner for. export c 阅读全文

posted @ 2020-04-11 00:35 Zhentiw 阅读(129) 评论(0) 推荐(0)

2020年4月10日

[RxJS] Building an RxJS Operator

摘要： While we’ve made sure to expose our spinner service using simple, external APIs, most of the time, it will be called in the same way, from observables 阅读全文

posted @ 2020-04-10 23:07 Zhentiw 阅读(117) 评论(0) 推荐(0)

[RxJS] Build an Event Combo Observable with RxJS (takeWhile, takeUntil, take, skip)

摘要： After another pat on the back from our manager, we get a notification that a new task has been assigned to us: “While most users find it useful, some 阅读全文

posted @ 2020-04-10 22:54 Zhentiw 阅读(387) 评论(0) 推荐(0)

2020年4月8日

[RxJS] Encapsulate complex imperative logic in a simple observable

摘要： Two very important features of the Observable primitive is that they can be activated by subscribing to them and disposed off when we are not interest 阅读全文

posted @ 2020-04-08 16:02 Zhentiw 阅读(126) 评论(0) 推荐(0)

[RxJS] Remember previous value by using pairwise operator

摘要： pairwise() will remember the last emit value. const src = interval(1000) .pipe( pairwise(), scan((acc, [prev, curr]) => { console.log(prev, curr) retu 阅读全文

posted @ 2020-04-08 15:44 Zhentiw 阅读(217) 评论(0) 推荐(0)

2020年4月5日

[Javascript] Data ownership, avoid accidently mutation

摘要： When implementing the store partten, we need to be careful about mutation. class DataStore { private lessons: Lesson[] = []; private lessonsSubject = 阅读全文

posted @ 2020-04-05 01:18 Zhentiw 阅读(155) 评论(0) 推荐(0)

2020年4月3日

[Next.js] Consume Next.js API routes with the SWR library on the client-side

摘要： The cool thing about Next.js API routes is that we can directly consume the API endpoints from pages. SWR is a nice tool for handling data loading sta 阅读全文

posted @ 2020-04-03 03:06 Zhentiw 阅读(479) 评论(0) 推荐(0)

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