Zhentiw - 博客园

2020年7月27日

[CSS 3 + JS] Create a Function to Convert JS Numbers into CSS Hex Colors

摘要： JavaScript numbers and CSS hexadecimal numbers don't play very well together. You can solve this with a conversion function that takes the number, con 阅读全文

posted @ 2020-07-27 16:09 Zhentiw 阅读(92) 评论(0) 推荐(0)

[Express] Handle Syncronous and Asyncronous Errors in Express

摘要： When express App run syncronous code: app.get("/test", (req, res) => { throw new Error("Oh no! The world has ended!"); }); Those code works fine. But 阅读全文

posted @ 2020-07-27 16:05 Zhentiw 阅读(181) 评论(0) 推荐(0)

2020年7月23日

[ML L12 N15] Regularization & Lasso Regression

摘要： If we have just one feature, the error is big, preformance is not good; but if we have too many features selected then it might be overfitting. So we 阅读全文

posted @ 2020-07-23 22:05 Zhentiw 阅读(160) 评论(0) 推荐(0)

[CSS 3] Responsive Text with vw unit

摘要： Just like the title h1 { font-size: 5vw; } Make font responsive to view width 阅读全文

posted @ 2020-07-23 19:06 Zhentiw 阅读(115) 评论(0) 推荐(0)

2020年7月22日

[XState] Guarded Transitions

摘要： Garuded Transitions, it prevents the state goes from current sate to its target state is condition is falsy. const machine = createMachine( { initial: 阅读全文

posted @ 2020-07-22 20:50 Zhentiw 阅读(152) 评论(0) 推荐(0)

2020年7月21日

[XState] Drag and Drop example (data-state, attr in css)

摘要： import { createMachine, assign, interpret } from "xstate"; const elBox = document.querySelector("#box"); const elBody = document.body; const assignPoi 阅读全文

posted @ 2020-07-21 18:46 Zhentiw 阅读(197) 评论(0) 推荐(0)

[Angular] Inherit Parent Route Parameters by Default with ParamsInheritanceStrategy

摘要： Right now, we're getting the ID route parameter off the of the parent route. This is because we want the info and items components to use the ID of th 阅读全文

posted @ 2020-07-21 15:43 Zhentiw 阅读(214) 评论(0) 推荐(0)

[Web] Use Web Speech API to make the browser speak out loud using SpeechSynthesis

摘要： Using the https://developer.mozilla.org/en-US/docs/Web/API/Web_Speech_API(Web Speech API) it is possible to use speech synthesis in the browser withou 阅读全文

posted @ 2020-07-21 15:35 Zhentiw 阅读(173) 评论(0) 推荐(0)

[React] useImperativeHandle + forwardRef

摘要： We have a message app: function App() { const messageDisplayRef = React.useRef() .... const scrollToTop = () => messageDisplayRef.current.scrollToTop( 阅读全文

posted @ 2020-07-21 15:26 Zhentiw 阅读(332) 评论(0) 推荐(0)

2020年7月20日

[XState] Assignement actions

摘要： Let's we want to keep tracking how many times on element was click inside Machine model. We can use 'context' & 'assign' function. import { assign, cr 阅读全文

posted @ 2020-07-20 22:36 Zhentiw 阅读(192) 评论(0) 推荐(0)

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