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我在terminal中设置了proxy后,开启proxyon后,执行npm install包错误: (proxyon是通过在~/.zshrc 中添加export http_proxy来实现的) 把proxyoff后,错误又没有了,不知道是啥问题。如果碰到这个问题就用: npm config set 阅读全文
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摘抄自react in action , see chapter4: 直接上图: DEFINITION Mounting is the process of React inserting your components into the real DOM. Once done, your comp 阅读全文
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摘抄自:https://medium.com/@agzuniverse/webpack-and-babel-what-are-they-and-how-to-use-them-with-react-5807afc82ca8 Webpack and Babel — Tools we can’t cod 阅读全文
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What is this? In JavaScript, the this keyword refers to an object. Which object depends on how this is being invoked (used or called). The this keywor 阅读全文
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import React, { Component } from "react"; import { render } from "react-dom"; import PropTypes from "prop-types"; const node = document.getElementById 阅读全文
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see: https://legacy.reactjs.org/blog/2015/12/18/react-components-elements-and-instances.html https://www.robinwieruch.de/react-element-component/ http 阅读全文
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参考: https://segmentfault.com/a/1190000007535316 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise https://devel 阅读全文
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js中的prototype绝对是js的一个重要知识点,有点像delegate的模式,和oop对象形式还是有些差别的,尽管可以做同样的事情。 简要学习可以参见:https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Objects/Objec 阅读全文
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我们可以这样create一个object: const person1 = { name: "Chris", introduceSelf() { console.log(`Hi! I'm ${this.name}.`); }, }; 但是当我们需要创建多个对象的时候,每次都要重复同样的code,这时 阅读全文
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在pycharm的Edit configuration中:“save console output to file”. see also: https://www.jetbrains.com/help/idea/setting-log-options.html?_ga=2.133841998.196 阅读全文